Tractor clutch friction disc replacement

Due to improper operation, the tractor is subjected to shock loads during use, which is prone to wear, cracks and burns of the main clutch driven disc friction disc, warping of the driven disc, loose friction disc and spline bushing rivets, and keyway wear and so on. The friction disc of the driven disc is worn to the extent that the rivets are exposed, the cracks are in more than two places, and the charring, etc., should be replaced with a new tractor friction disc.

14-Inch-16-Spline-PTO-Disc

1. Replacement of tractor clutch friction disc

(1) Use a drill bit slightly smaller than the diameter of the rivet to drill out the old rivet, or use a special punch to punch out 1 old rivet, remove the old friction plate, and check and correct the warpage of the steel plate.

(2) Put the steel disc and the spline bushing together on the mandrel for inspection, and close to the shoulder. Touch the dial indicator contact pin to the edge of the steel disc, so that the runout of the end face does not exceed 0.5 mm. Excessive use of wide-mouth wrench for correction. The steel plate can also be placed flat on the platform. Check its warpage by measuring the height of its edge.

(3) Clamp the friction disc on the steel disc with a vise, and drill the holes of the two friction discs according to the hole position of the steel disc, and make a mark to prevent dislocation during riveting, and the two friction discs cannot be interchanged.

(4) Countersink the friction side according to the diameter of the rivet head. The friction discs are then riveted to the steel disc with copper or aluminium rivets. Each row of rivets should be riveted from two sides alternately, so that the rivet heads are evenly distributed on both sides.

2-Inch-21-Spline-PTO-Disc-(1)

2. Matters needing attention when riveting the friction disc

(1) Select rivets with suitable diameter and length.

(2) The depth of the countersink is generally 3/5 of the thickness of the friction disc. If it is too deep, it will be easily damaged during work; if it is too shallow, the rivet head will be exposed quickly.

(3) After riveting of the driven disc, the rivets cannot be loosened, and the sinking depth of the rivet head shall not be less than the standard value in the manual.

(4) When the thickness of the driven disc exceeds the standard value or the surface unevenness of the friction disc exceeds the specified value, the surface should be milled or ground.

13-Inch-10-Spline-PTO-Disc-Asbestos-free

(5) If the friction disc is intact, but the rivets are loose, the old rivets can be removed and new rivets can be riveted. When the original rivet hole is ground, the hole can be enlarged, repaired by rivets with larger diameter, or re-drilled elsewhere.

(6) Some driven discs use elastic corrugated sheets, and attention should be paid when riveting: the two friction discs cannot be riveted together, but should be riveted on the elastic corrugated sheets with 8 rivets respectively; the elastic corrugated sheet itself has 1 mm The amount of deformation, there is no gap between the friction disc and the elastic corrugated sheet at the riveting, and there is a gap of about 1 mm in other places.

The above is a detailed introduction to the replacement of the tractor clutch friction disc. During the use process, the friction disc must be checked and replaced regularly to ensure the normal use of the clutch.

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How to judge clutch friction disc performance

The clutch disc is a composite material with friction as its main function and structural performance requirements. Tractor friction materials are mainly used to manufacture brake friction discs and clutch discs. These friction materials mainly use asbestos-based friction materials. With the increasing requirements for environmental protection and safety, semi-metal friction materials, composite fiber friction materials, and ceramic fiber friction materials have gradually appeared.

Since friction materials are mainly used in the manufacture of brake train and drive train parts on tractors, a sufficiently high and stable friction coefficient and good wear resistance are required. So how do we judge the performance of the clutch friction disc? In response to this problem, the tractor clutch manufacturer gave us a detailed explanation.

1. Appropriate friction coefficient

The friction coefficient is the most basic parameter of the friction material, which determines the basic braking torque of the brake disc. The national standard strictly requires manufacturers to indicate the coefficient of friction on the packaging. The friction coefficient must be appropriate. Too high will cause wheel lock, direction loss and burning during braking, while too low will result in too long braking distance.

2. Reliable security

Brake discs will generate instantaneous high temperature when braking, especially at high speed or emergency braking. At high temperature, the friction coefficient of the friction disc will decrease, which is called thermal recession. The level of thermal decay determines the safety in high temperature conditions and emergency braking.

3. Satisfactory comfort

Comfort is a direct reflection of friction performance, including braking feel, noise, dust, smoke, odor, etc. With the increase of private cars and the improvement of people’s living standards, on the basis of satisfying the basic premise of safety, comfort has increasingly become an important indicator of friction discs.

Among the comfort indicators, people are often most concerned about the noise of the brake discs. In fact, noise is also the most difficult problem for all friction material manufacturers to solve. The noise is caused by abnormal friction between the friction plate and the friction disc. The reasons for the noise are very complicated. The braking force, the temperature of the brake disc, the vehicle speed and the weather conditions may all be the reasons for the noise.

In addition, the causes of noise in three different stages of brake initiation, brake implementation and brake release are different. If the noise frequency is between 0 and 500Hz, it will not be felt in the car, but if it exceeds 1500Hz, the braking noise can be clearly felt.

4. Reasonable longevity

Service life is a product indicator that everyone is generally concerned about. Usually the brake discs can guarantee a service life of 30,000 kilometers. In order to meet the needs of different users, brake disc products are also developing in diversification, and two series of “safety” and “comfortable” have emerged to meet different customer needs. Among them, it provides better cost performance while meeting the requirements of safety and basic comfort.

Brake discs and brake shoes are wearing parts and safety parts that need to be replaced regularly. When the thickness of the brake discs is worn to a certain extent, it must be replaced. At this time, the electronic or mechanical alarm of the vehicle will remind the owner to replace it by means of a warning light or noise. Generally speaking, the wear degree of the brake discs or brake shoes in the same axle direction is the same and needs to be replaced at the same time.

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Analysis of Common Failures of Tractor Clutches

The tractor clutch is through the operating mechanism, relying on the friction between the main and driven components, the engine and the transmission are temporarily separated and gradually engaged, so as to provide or cut off the transmission power and ensure the smooth shifting of the transmission system. Some wheeled tractors mostly use friction clutches. Friction clutches transmit power by friction between contact surfaces. The clutch driving disc is connected with the crankshaft of the engine and rotates with the crankshaft, and the driven disc is connected with the input shaft of the transmission.

When sufficient pressure is provided to press the driven piece and the driving piece together, the power of the engine is transmitted to the driven piece through the driving piece due to the friction of the contact surfaces of the principal and driven pieces. When the pressing force is canceled and the master and the follower are out of contact, the power of the engine cannot be transmitted to the follower. Tractor work requires that the clutch can transmit the maximum torque from the engine without slipping, the separation is rapid and complete, the rotational inertia of the driven disc is small, and the engagement is smooth; and the heat dissipation is better, and the operation should be light. If these requirements can not be completed or the completion is not good, it means that there is a fault in the clutch that needs to be identified and eliminated in time.

Tractor clutch manufacturers have conducted a detailed analysis of clutch failures often encountered in use.

 

1. Change of clutch free stroke13-inch

The clutch free travel refers to the distance that the clutch pedal moves from the start of the clutch pedal movement until the clutch starts to disengage. The clutch free stroke has a specified value, and it is not qualified if it is too large or too small. If the free stroke of the clutch is too large, the clutch is not completely separated, and the gear shifting is difficult, which will cause the driven disc to wear out: If the free stroke of the clutch is too small, the clutch cannot be fully engaged, the power cannot be fully transmitted to the transmission, and the driving is weak. The free travel of the clutch pedal is one of the conditions to ensure the reliable operation of the clutch. The free travel of the tractor clutch pedal should be checked regularly and adjusted if necessary.

When a tractor is running, the free travel of the clutch pedal changes automatically, the power of the diesel engine decreases, the free travel uphill becomes smaller, the free travel downhill becomes larger, and there is an abnormal noise when going uphill. Check that the fixing bolts of the diesel engine are not loose, and the clearance of the clutch and transmission mechanism is normal. According to the above phenomenon, it is preliminarily judged that the semicircular thrust plate of the crankshaft is loose, remove the bottom cover of the clutch housing and use a crowbar to pry the flywheel back and forth. The distance between the front and rear of the flywheel has reached about 6 mm, and it is inferred that the front and rear semicircular thrust pieces have both fallen off. After further disassembly and inspection, it turned out that the crankshaft semicircular thrust piece fell off.

The crankshaft semi-circular thrust plate falls off, which makes the end clearance of the crankshaft larger, and the crankshaft can move back and forth in the body. Although the fixing bolt of the diesel engine is not loose, when the crankshaft moves forward, the flywheel and the clutch release lever also move forward together, and the release bearing and release fork are still fixed in their original positions, so the free stroke of the pedal is increased. When the crankshaft moves backwards, the flywheel and the clutch release lever also move backwards together, approaching the release bearing, making the free stroke smaller. The crankshaft moves forwards and backwards, so that the connecting rod also moves forwards and backwards, and makes the pistons approach the front and rear sides of the cylinders, so the power of the diesel engine drops and abnormal noises appear. At the same time, because the crankshaft pulley and the driven pulley are not on the same plane, it is easy to cause damage such as belt fluff and flanging. The fault disappeared after replacing the crankshaft thrust plate.

12 Inch 26 Spline

2. The clutch suddenly cannot be disengaged

Incomplete clutch separation means that it is difficult to shift gears, or even impossible to shift gears. There is a sound of gears and the clutch pedal is pressed, and the drive shaft still rotates, which also accelerates the wear of the friction plates.

A tractor suddenly stepped on the clutch pedal while driving, and the clutch could not be disengaged. It should be turned off and stopped to check that the clutch release fork can swing normally, but the pedal feels much easier than before. The bottom cover of the clutch housing was removed for further inspection, and it was found that the left and right bosses in contact with the release bearing seat and the release fork were not in the same plane, and the two bosses were seriously skewed.

The reason for this failure is that the return spring of the clutch release bearing seat is too soft, and the long-term use makes the limit surfaces of the left and right bosses of the release fork deviate. And the bearing seat moves forward, so that the clutch cannot be disengaged. At this time, the bearing seat should be released by replacing the clutch.

3. The clutch slips and separates incompletely

Clutch slip means that when the tractor starts, the clutch pedal is completely released, the tractor cannot move forward, and the engine does not turn off, then the clutch slips. It is mainly manifested in the tractor driving, the speed cannot be increased rapidly with the increase of the engine speed, that is, the acceleration performance is poor, when the heavy load, climbing or driving resistance is large, you can smell the burnt smell of the burnt friction plate.

A tractor that has been driving for many years, the clutch began to slip. After adjusting the free stroke of the clutch, not only did the slip not disappear, but a new fault was added: the clutch could not be completely disengaged, and the operator was very confused.

In fact, this fault is caused by the damage of the driven disc friction plate. After the friction plate is worn, it becomes thinner, and the ability to transmit torque is significantly reduced, which will inevitably lead to the clutch slipping. The problem of incomplete clutch disengagement is solved. In this case, only replace the friction plate with a new one. However, when replacing the clutch friction plate, pay attention to checking and adjusting the free stroke of the clutch pedal, otherwise the clutch is prone to incomplete separation: when the free stroke is too small, it is easy to cause the clutch to slip.

8-Inch-16-Spline

4. The transmission trembles after releasing the clutch pedal

When a tractor diesel engine is idling, depress the clutch pedal. Clutch rattles; release clutch pedal, transmission case shakes. Inspection found that the clutch release bearing was functioning properly. The main and driven discs are not faulty, but the front bearing of the first shaft of the transmission is damaged.

Cause analysis: The front bearing of the first shaft of the transmission is poorly lubricated, corroded or enters the dirt, the movement of the steel ball is blocked, resulting in damage to the cage, and the steel ball is concentrated somewhere between the inside and outside, causing the first shaft of the transmission to be misaligned with the crankshaft main journal, and the clutch Wobble occurs when the driven disc turns.

When the diesel engine is running idly, step on the clutch pedal, the bearing steel ball rolls at high speed in the original position, and makes an abnormal sound: when the clutch pedal is released, the damaged bearing rotates with the crankshaft and the main and driven discs of the clutch, and the sound weakens or disappears, but due to the transmission The axis of the first shaft is offset relative to the axis of the crankshaft main journal, so the phenomenon of jitter occurs. Troubleshoot after bearing replacement.

The above is a detailed analysis of several common faults in the use of tractor clutches. If you encounter relevant problems during operation, please feel free to contact us.

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Correct operating procedures for agricultural tractors

In our agricultural planting, we must reasonably grasp the production efficiency and use our tractors reasonably so as to make our vehicle braking more flexible, so how should we operate correctly during the operation woolen cloth?

Start

1. After the tractor starts normally, observe the surrounding environment, and after confirming that there is no obstacle, close the door and send a signal.

2. Disengage the tractor clutch, push the shift lever into the appropriate gear, and shift the gear smoothly and accurately.

3. Gradually increase the accelerator while slowly engaging the clutch to make the tractor start smoothly. The process of engaging the clutch should be fast and then slow. After the tractor has moved away, the clutch pedal can be fully released. Do not step on the clutch pedal while driving to avoid early wear of the clutch friction plates

Variable speed

When a tractor is driving, with the change of environmental conditions, it is necessary to continuously change the driving speed. Whether the tractor can shift gears in a timely, accurate and rapid manner has a great influence on prolonging the service life of the locomotive, ensuring smooth driving and saving fuel.

1. Selection of gears

Changing the gear is actually changing the ratio of the engine speed to the transmission shaft speed. The lower the gear, the greater the speed ratio, and the greater the torque and traction. Conversely, the higher the gear, the less torque and traction you get.

During driving, when the movement resistance increases and requires large traction (such as uphill, heavy load, etc.). The low-speed gear should be selected; but the low-speed gear has low vehicle speed, high engine speed, fast temperature rise, and large fuel consumption, so the low-speed driving time should be as short as possible.

The medium-speed gear is a transition gear from low to high or from high to low, and is usually selected when turning, crossing a bridge or when it is difficult to pass. When the road conditions are good and the engine has sufficient power, the high-speed gear should be selected.

High-speed gear travels fast and saves fuel, but traffic safety must be ensured.

2. The operation of shifting from low-speed to high-speed

1) Refuel to increase the speed (rushing), the rushing should be stable, the rushing time varies according to the load of the locomotive, the rushing time is longer when the load is heavy, and the rushing distance of the high-speed gear is longer than that of the low-speed gear;

2) Lift the accelerator, step on the clutch pedal, and place the gear lever in the neutral position;

3) Engage the clutch, then disengage the clutch and quickly shift the shift lever to a higher gear;

4) Refuel smoothly and shift is completed；

3. The operation of high-speed shifting to low-speed

1) Reduce the accelerator, disengage the clutch, and place the gear lever in the neutral position;

2) Engage the clutch and add empty oil;

3) Quickly depress the clutch pedal, shift the gear lever to a lower gear, engage the clutch, and refuel. The key to this process is to grasp the size of the empty oil, which depends on the speed of the vehicle. When changing the same gear, when the speed is fast, the empty oil should be added more, and vice versa. When the speed is very slow, it is not necessary to add empty fuel.

4. Precautions for shifting

1) When shifting gears, you should concentrate, keep your eyes on the front, hold the steering wheel in one hand and the ball head of the gear shift lever in the other hand, gently push into the required gear, do not look left or right, and do not push or pull hard on the gear lever, so as not to damage the meshing gear;

2) The speed change should be carried out step by step, and the gear should not be exceeded;

3) When changing the forward or reverse direction, the gear should be changed only after the locomotive stops steadily.

Turn

1. When the crawler tractor is turning, the joystick on the steering side can be pulled to turn. When making a sharp turn, first pull the lever all the way, then depress the brake pedal on that side, and then release the pedal and then the lever after turning.

2. When turning the wheeled tractor, it should decelerate first and then turn. When turning slowly, you should turn early and slow, and hit less and return less; when turning sharply, turn late and fast, and make more turns; when turning small turns, you can use unilateral braking assistance at low speed.

3. When turning, since the wheel tracks of the front and rear wheels on the inside do not overlap, the track of the rear wheel is biased to the inside. Therefore, when turning, don’t get too close to the inside. You should turn the steering wheel appropriately according to the size of the camber and the distance of the roadside obstacle, so that the inside rear wheel can pass smoothly and prevent the rear wheel from crossing the road and encountering obstacles.

Reversing

When reversing, keep your mind focused, use a low-speed throttle, and be ready to park at any time.

Brake

1. Braking method of tractor

One is engine braking and the other is braking with the brakes. Engine braking is to use the drag effect of the engine to brake, that is, when the speed of the vehicle is high, the accelerator is rapidly reduced, and the compression force of the cylinder is used to brake the driving wheels to achieve the purpose of reducing the speed of the vehicle.

Tractor braking is divided into two types: predictive braking and emergency braking according to its nature: predictive braking is to make judgments in advance according to terrain, environment, etc., to decelerate and stop in preparation, and the method is to reduce the “accelerator”, Use engine braking to reduce speed. If necessary, use the brake to brake intermittently at the same time. After the vehicle speed is reduced to a certain level, disengage the clutch and use the brake to stop the vehicle. In special circumstances, the brake pedal should be quickly stepped on, and then the clutch should be disengaged to stop within a short distance. When emergency braking, do not depress the clutch pedal first

2. Parking

When parking, choose a suitable location to ensure traffic safety. Decrease the accelerator to reduce the speed of the tractor, then depress the clutch pedal, place the shift lever in neutral, or lightly depress the brake pedal to assist in stopping. After the car is stopped, the engine should be idled, and the engine should be turned off when the engine temperature drops below 60°C. If the load of the tractor is light, the working time is short, and the engine temperature is not high, it can be turned off after stopping.

The above is all about the correct operation of the tractor. The tractor driver must master some necessary driving skills in the process of driving the locomotive, which is very important for the normal use of the tractor and the service life of the tractor gift box IQ. At the same time, it can also improve work efficiency, reduce unnecessary economic losses, and provide the most basic security guarantee for the safety of oneself and others.

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How to properly adjust a tractor clutch

The clutch is an essential and important part on the tractor. The clutch gradually engages the engine with the driveline, ensuring a smooth start of the tractor. When the transmission needs to change gears according to the driving of the tractor, the clutch can temporarily cut off the power transmission of the engine to ensure the smooth shifting of the transmission. The clutch also has overload protection, preventing damage from overloading the driveline and PTO by slipping the friction linings.

However, during the use of the clutch, due to natural wear and improper use and operation, the wear of the clutch transmission mechanism and the wear of the friction plate cause the clutch to slip during the operation of the tractor, and the clutch is not completely separated, which affects the normal use of the tractor. Therefore, the clutch should be used correctly during use, and maintenance and adjustment should be carried out in time to reduce the incidence of damage to the tractor clutch and prolong the service life.

1. Correct use of clutch

When driving a tractor, when operating the clutch, the disengagement should be quick and complete, and the engagement should be smooth and soft.

When the tractor is working, do not put your foot on the clutch pedal, let alone control the speed of the vehicle with a half-clutch method. Immediately after the clutch is engaged, take your foot off the pedal to avoid the clutch being half-engaged. Use the clutch reasonably, and do not use the method of slamming the clutch to overcome the trapping, overloading and overcoming obstacles. The tractor should not start with a high gear with a load, it should be in a low gear first, and then change into a high gear after starting.

2. Correct adjustment method of clutch

During the use of the clutch, due to the wear and tear of the parts, the clutch will slip or the clutch will not be completely separated. Therefore, it should be adjusted in time. In order to make the clutch work normally, it is necessary to ensure that there is a clearance of 2-3 mm between the release bearing and the inner end faces of the three release levers. When the clutch pedal is depressed until the clearance is eliminated, the travel required by the lower end of the release rocker arm along the axis of the limit bolt is called “free travel”.

After that, continue to step on the clutch pedal, so that the lower end of the release rocker arm continues to move forward along the axis of the limit bolt, and the clutch is completely separated. This distance is called “working stroke”.

During use, due to the wear of the friction plate, the pressure plate moves forward, which will gradually reduce the free stroke. Therefore, the free stroke must be checked and adjusted regularly. When the clutch is not completely disengaged, the working stroke should be adjusted. The adjustment method is: loosen the locking nut of the limit bolt, reduce the exposed length of the limit bolt, and make the working stroke reach the specified value.

If it does not work, the height of the release lever must be adjusted, and then the free stroke and working stroke must be adjusted. After replacing the friction plate with a new one, ensure that the distance between the inner end face of the release lever and the end face of the flywheel when the clutch is in the engaged state meets the regulations.

(1) Adjustment of single-acting clutch clearance

First, adjust the gap between the release lever and the release bearing by changing the length of the clutch lever, and then adjust the 3 release levers by twisting the release lever adjustment nut to make it consistent with the release bearing gap (the ends of the 3 release levers should be in the same plane).

(2) Adjustment of clutch clearance with small brake

First adjust the small brake clearance to the standard value, and then adjust the clutch clearance. The adjustment sequence cannot be reversed. The clutch should be engaged when adjusting the small brake clearance. At this time, the gap between the brake disc friction plate and the brake pressure plate should be 7~8.mm. When the clutch is disengaged, the gap between the small brake spring earring and the pressure plate should be 3~5mm. When the above gap does not meet the requirements, the specified gap value can be obtained by changing the length of the tie rod.

If the gap between the brake friction plate and the brake pressure plate is less than 7-8 mm when the clutch is engaged, and when the clutch is disengaged, the gap between the small brake spring earring and the pressure plate is greater than 3-5 mm, The connecting pin on the pull rod should be removed, the lock nut should be loosened, the pull rod fork should be withdrawn, and the pull rod should be extended until the above two gaps reach the standard value. On the contrary, if the former gap is too large and the latter gap is too small, adjust in the opposite direction.

After the small brake clearance is adjusted, adjust the clearance between the clutch release lever release bearings. The normal state of the clutch should be: when the clutch is in the engaged state, the gap between the end of the release lever and the end face of the release bearing is 3~4mm, the corresponding free stroke of the pedal is 30~40mm, and the ends of the 3 release levers should be On the same plane, the deviation should not be greater than 0.2 mm. If it does not meet the specified value, it should be adjusted. The method is: first remove the cotter pin of the adjusting nut, screw in or loosen the adjusting nut until the clearance is standard. After adjustment, when the full stroke of the clutch pedal is 150~160 mm, the clutch should be completely disengaged, and at the same time it should meet the braking time requirements, otherwise it should be re-checked and adjusted to the standard state.

(3) Double-acting clutch clearance adjustment

In addition to adjusting the clearance between the release lever and the release bearing according to the adjustment method of the single-action clutch, the clearance of the auxiliary clutch should be adjusted, that is, the clearance between the three support bolts and the stop pin. This clearance is adjusted by special screws, screwed in or loosened Remove the screw.

3. Maintenance of clutch

Every 10~20 hours of operation of the tractor, it is necessary to add butter to the front bearing and release bearing of the clutch (some are immersed in oil during disassembly and assembly). When adding butter, do not add too much. Generally, use a grease gun for 3 to 5 times. The amount of oil should be moderate, so as to prevent too much oil from entering the friction plate and causing the clutch to slip.

Due to the small clearance of the clutch, muddy water is easy to splash into the clutch during the working process, and the clutch should be cleaned frequently.

Once oil is found on the friction plate, it should be cleaned in time. When the clutch slips due to oil on the friction plate during operation, it should be cleaned. The method is as follows: add kerosene into the clutch housing (submerging 1/3 of the flywheel is appropriate), start the engine, and run it for 2-3 minutes with the clutch engaged to clean the oil on the surface of each part of the clutch, and release the cleaning oil after the engine is turned off. .

When the clutch is disengaged, it can be cleaned again to remove the oil stains on the contact end faces of the main and auxiliary driven parts. According to the requirements of the technical maintenance regulations, regularly check and adjust the clutch clearance. Once the clutch slips, incomplete separation and other faults are found, they should be eliminated in time, and “sick” operations are not allowed.

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How much does a tractor clutch replacement cost and how to replace it?

The tractor engine and gearbox power transmission device is the clutch three-piece set, that is, the pressure plate, the friction plate and the release bearing. It is generally recommended that the tractor clutch three-piece set needs to be replaced after reaching the limited mileage, and the replacement cost is about ￥500. The hourly rate varies from place to place.

Sometimes, many tractors have not reached the limited mileage, and may also need to replace the three-piece clutch, so how do you judge that your clutch plate needs to be replaced?

Symptoms of a clutch plate failure

1. When you step on the clutch pedal or lift it up, you can hear the sound of metal friction or even smell the smell, which is a very obvious phenomenon of serious wear of the clutch plate;

2. I feel that the clutch stroke has changed from when I first bought the car, and the clutch joint point has become higher, which is probably due to the wear of the clutch plate;

3. It feels that the power of the car drops when climbing a hill, and the engine speed increases, but the power response is not timely, or there is insufficient power;

4. When the clutch is lifted, it is felt that the power connection is not smooth, and the car is intrusive, which is also the result of the wear of the clutch plate.

The clutch plate is an important part of the clutch. Before the clutch needs to be replaced, the wear resistance of the clutch is generally reduced due to severe friction. Therefore, when the clutch is in use, there is a jerky feeling when stepping on and lifting the clutch, so the clutch needs to be replaced at this time. In short, how often the clutch is replaced is not fixed, and the frequency of tractor clutch replacement is also different according to the service life and the driver’s driving habits and road conditions.

Tractor Clutch Replacement

Remove the clutch fixing nut and pull the clutch lever. Generally, the clutch will fall off by itself, otherwise it will have grip. Take off the release bearing and remove the separator embedded in the bearing for replacement.

Tractor Clutch Replacement Precautions

(1) When repairing and disassembling the tractor clutch components, it is not allowed to clean with sanding or dry brushes and compressed air, so as to avoid powder dust (apply a cloth dipped in water). The clutch friction plate contains asbestos fibers. If dust is generated during maintenance, the asbestos fibers in the dust will be suspended in the air, and inhaling the air containing asbestos fibers will cause serious harm to the body.

(2) When disassembling and assembling the clutch cover, use special tools to fix the flywheel, and make a mark, and tighten it in stages during installation.

(3) Insert the special tool or the input shaft of the transmission into the central spline hub and the guide bearing of the transmission input shaft to prevent the clutch disc from falling off. Also use special tools or the input shaft of the transmission to align the guide bearing of the driven plate and transmission shaft during installation.​​
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(4) Before installing the new driven disc, put the new driven disc on the transmission input shaft to see if the spline fit is appropriate.
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(5) Gradually loosen the fixing bolts of the clutch cover diagonally; gradually tighten them diagonally during installation.​​
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(6) When installing the driven disc, the shock absorber should be facing backward, and a small amount of grease should be applied to the spline hub.
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(7) When installing the clutch cover parts, if there is lubricating oil or grease on the clutch surface and pressure plate, wipe it off with a dry rag.

(8) Align the locating pin on the clutch cover with the locating pin on the flywheel, and then gradually tighten the bolts alternately. Check the rear main bearing oil seal of the engine and the front oil seal of the transmission for oil leakage. If oil leakage is found, it should be repaired.

(9) Additional lubricating oil is not required for the release bearing and transmission guide. If additional oil is added, it may cause oil stains on the clutch driven plate and cause the clutch to slip.
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(10) When assembling, apply grease to the spline hub of the clutch driven disc, the leading edge of the release bearing, the inner seat of the release bearing, the release and the contact points of the push rod.
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(11) Disassembly and assembly of the clutch pipeline. Pay attention to the disassembly and assembly method of the clutch pipeline, and use a double wrench, otherwise it will be easily screwed.​​
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(12) When the friction plate is worn to the specified wear limit, the driven disc assembly should be replaced in time. To prevent the clutch from slipping and scratching the surface of the pressure plate and flywheel.
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(13) Handling should be handled with care and should not be dropped. During transportation, do not lift the separation ring to avoid deformation of the torsion spring.

(14) Use it correctly to avoid clutch slippage caused by improper operation. It is strictly forbidden for the driver to step on the clutch pedal all the time. In principle, the clutch is required to be opened quickly, and once the pedal is fully engaged, the pedal should be released as quickly as possible and engaged smoothly to prevent the long-term semi-linked state. time to happen. It is not allowed to start with a large accelerator and a high gear; when shifting from a low gear to a high gear, the accelerator is engaged before the vehicle speed is high enough; starting on a steep slope several times in a row; on a muddy road, the vehicle slips or the wheels sag. Under such circumstances, the driver uses the method of increasing the accelerator and half-clutch to force the rush, etc. In this way, the clutch will generate high temperature due to continuous severe friction, resulting in burnout of the friction plate, deformation of the pressure plate and even thermal cracking, resulting in serious consequences.


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(15) During the daily maintenance of the vehicle, the user should pay attention to the inspection of the clutch release operating mechanism, eliminate the leakage of the pump and pipeline in time, and ensure the normal operation of the clutch.

The above is all about the replacement of the tractor clutch. When operating the tractor daily, you must follow the operation essentials of one fast, two slow and three linkages, that is, when shifting gears, the clutch pedal just starts to lift quickly, and when the clutch plate reaches the semi-linked stroke When the clutch pedal is lifted, the lifting speed of the clutch pedal is slowed down. After the clutch is fully engaged, the clutch pedal is slowly lifted, and the accelerator pedal is depressed at the same time to let the vehicle start smoothly.

Secondly, in the process of driving, we should pay attention to stepping on the clutch pedal only when shifting gears and braking at low speed, and do not step on the clutch pedal in other situations, because some drivers like to put their feet on the pedal for a long time during driving. On the clutch pedal, doing so will accelerate the wear of the clutch plate, resulting in damage to the clutch plate. The only way to ensure that the clutch plate will not wear abnormally, affecting its service life.

For more information on the cost of tractor clutch repair, click to visit:

Tractor clutch friction disc replacement

How much does a tractor clutch replacement cost and how to replace it?

How Much Does a Tractor Clutch Replacement Cost?

How Much Does Tractor Clutch Repair Cost?

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How to use the tractor clutch correctly?

The tractor clutch is installed after the engine and before the transmission. Its basic function is to transmit and cut off the power. The main function is to transmit the power from the engine to the transmission; the second is to ensure that the engine starts and the tractor starts smoothly; Temporary parking; fourth, to prevent overloading of the transmission system; fifth, the double-acting clutch also plays the role of transmitting or cutting off the power output.

However, tractor clutches often fail frequently during use. In fact, among the clutch failures, in addition to the quality problems and design problems of the clutch itself, a large part of the failures are related to improper use and operation. The following tractor clutch manufacturers will give you the details. Introduce the correct operation and use of the tractor clutch.

Do not step on the clutch, do not step on the clutch halfway.

Some tractor operators habitually put their feet on the clutch pedal when working. This habit is not good, and it is easy to damage the clutch. When the clutch of the tractor is working normally, the disc spring tightly presses the friction plate on the flywheel of the engine, and the clutch is in the state of pressing and engaging, and the friction plate does not slip.

When the clutch needs to be disengaged, it is realized by stepping on the clutch pedal. If the tractor is always half-stepped on the clutch, and the foot is placed on the clutch pedal for a long time, the clutch will often be in a semi-engaged and disengaged state, making the clutch It is in a semi-slip state during operation, which accelerates the wear of the clutch friction plate and pressure plate, and reduces the ability of the clutch to transmit torque. It is easy to cause the clutch to slip and burn the friction plate. The end face of the flywheel is ablated and pulled, and the clutch disc spring is annealed. When driving a tractor, you generally do not need to step on the clutch except for starting, shifting and braking at low speed, and you generally do not need to step on the clutch at other times. At this time, do not always step on the clutch pedal.

Correct operation of the tractor when starting.

When the tractor starts, it is necessary to depress the clutch to engage the gear. When depressing the clutch, depress the clutch pedal quickly, and go all the way to the end, so that the clutch can be completely separated, then engage the gear, and then release the clutch pedal; when releasing the clutch pedal, Operate according to the principle of “fast first, then slow”, that is, the free stroke before the clutch is not engaged can be lifted slightly faster, when the clutch starts to engage and appears semi-linked (the engine sound changes at this time), it should stop for a while, and then Slowly lift the clutch pedal (at the same time gradually add the throttle), that is to say, in the process from semi-linked to fully combined, the pedal should be lifted slowly to make the clutch engagement smooth, and while the clutch pedal is slowly lifted, according to the size of the engine resistance Gradually step on the accelerator pedal, the operation of the accelerator should be smooth and appropriate, so that the tractor starts smoothly. After the clutch is fully engaged and the tractor starts smoothly, you should quickly remove your foot from the pedal and place it under the pedal. When the tractor is not using the clutch, it is strictly forbidden to put your foot on the clutch pedal.

Correct operation of the tractor when shifting gears.

At present, the transmission of tractors is still mostly a gear shifting structure with a mesh sleeve. It is recommended to use the two-leg clutch shifting method for shifting, which can make the shifting more smooth and reduce the wear of the shifting mechanism and clutch of the transmission. The specific operation method when using the two-foot clutch to shift gears is as follows: when shifting up, depress the clutch pedal and shift the shift lever to a higher gear; when shifting down, depress the clutch pedal with the first foot and shift the shift lever at the same time. Push to neutral, then lift the clutch pedal, and at the same time give a foot of empty oil according to the speed of the vehicle, so that the engine speed increases, then depress the clutch pedal again, and push the shift lever to the low-speed gear at the same time.

9-Inch-16-Spline

Correct use of the clutch when braking.

In the use of tractors, except for low-speed braking and parking below 10km/h, the clutch pedal is required, and the clutch pedal is generally not required for braking in other situations. When the tractor brakes and stops at low speed, depressing the clutch pedal is mainly to prevent the engine from stalling. At this time, the correct operation method is to depress the brake pedal first, and then depress the clutch pedal to make the tractor stop smoothly; When braking at medium or high speed, depressing the clutch pedal not only does not help braking, but may also bring danger to driving safety.

Pay attention to safety when using the clutch.

It is strictly forbidden to disengage when going uphill; it is strictly forbidden to step on the clutch and slide in neutral when going downhill; it is strictly forbidden to lift the clutch pedal sharply after engaging the gear; The door, the method of slamming the clutch pedal to pass; there is to minimize the number of clutch disengagement and engagement, and the number of semi-linkages during use.

The above is all about the correct use of the tractor clutch. In the process of operating the tractor, you must strictly abide by the correct operating procedures to avoid losses due to improper operation.

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Precautions for operating the tractor clutch

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When we operate the tractor clutch, we also need to master certain methods and steps, and pay attention to better prolong its service life. Here are some things that need to be paid attention to!

  1. Pay attention to the correct posture of stepping on the clutch. The clutch pedal should be controlled using the forefoot. When stepping on the clutch pedal, step on the clutch pedal with the soles of your feet, the heels should be close to the ground, and the knees should be kept slightly bent when the clutch is pressed to the top. Never step on the pedals with your toes or lift your heels off the ground to avoid underpowered or slipping.
  2. pay attention to control the timing of the clutch. When driving, do not release the clutch too quickly or deliberately increase the engine speed too high. This will accelerate the wear of the clutch.
  3. Be careful to shift gears only after fully depressing the clutch pedal.
  4.  Note that when driving, do not always put your left foot on the clutch pedal, and do not step on the clutch pedal with your right foot.


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Routine maintenance of tractor clutch

Regular lubrication of the clutch After the clutch works for a period of time, in order to reduce friction and damage, it must be filled with butter for lubrication. Usually, the front bearing and release bearing of the clutch should be filled with butter every 10 to 20 hours of operation of the tractor. When filling, if you use the oil gun to hit the oil for 3 to 5 times, the friction lining will slip if too much butter is stained. The models included in the common tractors at this stage use closed release bearings. The locomotive does not need to be filled with butter during normal operation. After 200 to 300 hours of operation, the bearings are impregnated with butter. Remove the release bearing, clean it with diesel oil, and then infiltrate the melted butter to fill the bearing with butter. After the water cools and solidifies, it can be removed and re-installed.

Precautions for tractor clutch

  1. Start to check whether the speed control operating handle is in the neutral position, whether the parking brake is in the braking position, and whether the power take-off handle is in the separation position, otherwise it will lead to a safety production accident.
  2. The tractor should observe whether the water temperature gauge and oil pressure gauge are normal during the application, otherwise it will cause abnormality in the vehicle and affect the application.
  3. When the tractor is transporting, the left and right brake pedals are chained together to prevent uncontrollable automatic steering during braking and lead to production safety accidents.
  4. The driver is forbidden to put his foot on the clutch pedal and brake pedal during the work of the tractor, otherwise it will cause the initial damage of the clutch and brake disc, which will affect the application.

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Correct operation steps of agricultural clutch

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Agricultural clutch is a kind of agricultural machinery, and its operation steps are as follows:

  1.  Try to start in 1st gear. In order to get the torque at the start, reduce the “overload” of the clutch.
  2. Use “semi-linkage” as little as possible. Drop the clutch as soon as possible after every successful start, and use the clutch as lightly as possible every time you shift gears.
  3. When using the clutch, the clutch pedal should be “stepped to the bottom” and “relaxed” to ensure the complete separation and reliable engagement of the clutch. In order to ensure full contact between the clutch plate and the flywheel and pressure plate.
  4. Change the throttle and gear reasonably, and try not to use semi-separation to reduce the speed of the vehicle; do not put your feet on the clutch pedal during driving, excessive use of semi-separation will cause premature wear of the release bearings, release levers and friction plates .
  5. When going downhill, use a low-speed small accelerator, and do not let the car slide freely in neutral; when the car is trapped, use the differential and differential lock correctly, and do not use the method of slamming the clutch pedal to start.
  6. Do not put your foot on the clutch pedal when driving normally.
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