When the truck is used for a period of time, there is often a phenomenon of the addition and subtraction throttle, which is often difficult to judge the source of the fault, the impact on the transmission system can easily lead to early damage of parts and components, and also cause poor driving feeling.  

 The gap of traction saddle is greatly increased and the impact of deceleration is strong

 The tractor is more susceptible to the addition and subtraction of the throttle to the impact of the fault, because it and the trailer are two parts, their connection point is also a high incidence area of such failure.  It is known that the part connecting the towing head and the trailer is the traction saddle and the traction pin, and that if the clearance between them is too large, there will be a strong impact on the acceleration and deceleration.  

 How should it be judged that there is a gap between them?  In fact, it is also easy, specific operation method: pull the driver brake ( no vehicle type can disconnect the air link between the tractor and the trailer ), so that the trailer emergency braking stops in place.  

 In combination, a person driving the tractor forward and backward several times, the other person to observe whether there is a relative gap between the towing wheel and the trailer, if it is easy to observe.  

 In addition, the upper and lower parts of the traction saddle also need to be observed, because the upper and lower parts of the saddle are fixed by a shaft pin, and the axle pin has the shaft sleeve, generally made of rubber or nylon material, if the damage of the sleeve is also very prone to the channeling of momentum leading to a sense of impact.  

 What should we do if we conclude that there is a greater gap between the towing saddle and the trailer?  Don't worry, this problem is generally handled well, there is a adjustable screw on the left side of the traction saddle, but the general people don't know what it is, in fact, it is the device to adjust the working clearance of traction saddle, screw the internal screw clearance into the big, and the clearance to be small, you can adjust according to the gap of the traction wheel of your own vehicle, but 10 million to remember to adjust the lock nut.  If the axle sleeve clearance of the upper and lower hinge parts of the traction plate is large, it can only be disassembled for the axle sleeve and shaft pin replacement maintenance, but such accessories are generally cheaper and the maintenance cost is not high.  

 Easily overlooked failure, double – drive, pull – arm damage

 The damage of the pull arm sleeve of the double – drive shaft type is also the cause of the impact sense of the acceleration and deceleration, the fault caused by it is generally few people can notice, often first suspect the other parts, after spending a lot of money maintenance, the real reason is not found, the maintenance hit shui Piao, it is easy to cause unnecessary loss.  

 If all of the Double models ( whether tractors, trucks carrying trucks, dump trucks ) such faults should first check the state of the arm sleeve ( need to drill under the vehicle, do not be afraid of dirty ), if there are obvious signs of damage should be immediately replaced.  Pulling arm sleeve damage does not only appear and add and minus the impact sense of throttle, often accompanied by the double drive shaft not parallel, eat tires and other fault, not as soon as maintenance can cause greater loss, in addition the arm sleeve replacement is more troublesome, do not recommend oneself, or find a repair shop is more reliable.  

 The transmission system itself has a sense of shock and deceleration

 In addition to the above two kinds of indirect impact factors, the most common is the transmission system itself running gap too large due to failure, this kind of fault occurs regardless of models, 4x, 6, 6, 8 models are likely to appear.  There are generally two most frequent points, the drive axle and the Baotou north – run heavy truck accessories drive shaft.  

 First talk about the driving axle, if it is a large gap in its operation, it is generally caused by the internal gear structure, the clearance is too large, how to judge is simple, rotate the drive shaft around the hand, determine the clearance of the drive axle, according to the free amount of the drive shaft, if it can not be judged according to the amount of rotation, can use other normal vehicles as a reference, can be very good discrimination.  

 If the gap is too large, it is recommended to carry out the drive axle disassembly and maintenance as soon as possible, because this time the drive axle is often too close to the breakdown damage, once the bad in the halfway caused by the loss will often be relatively large, rather than repair ahead.  

 The damage of the shaft of the transmission shaft of Baotou – north – Ben heavy truck accessory drive will also cause the impact feeling, which is generally good judgment, because it will cause the vibration of the car body vibration, if the acceleration and deceleration impact and the body shake at the same time, the general situation is that the cross shaft of Baotou Bei Ben heavy truck accessories shaft should be replaced immediately after the discovery, must not continue to drive.  

 ● afterword:

 The impact of the truck and deceleration is a very common failure, but because it does not affect the movement in the short term, many people will ignore it, but the impact on the vehicle transmission system in the past is not small, because they are generally very large, we hope that the vehicles of the same kind of failure to arrange repair as soon as possible, do not procrastinate, because some small failure caused greater loss.