The front suspension system mainly consists of parallel semiellipse leaf spring, cylindrical shock absorber, stop block and front push-rod.
1) Front leaf spring
MT106: 13 pieces in total, in which 4 main leaves, reinforced parallel semiellipse front leaf spring. The leaf spring configuration for each model has already been justified by vehicle performance test. It is not allowed to make modification without approval; otherwise it may lead to the system no longer in harmony with others or vehicle out of control which would cause unnecessary personal injury and property loss.
2) Fault diagnosis
The faults in front suspension system may be relating to multiple systems, including steering gear, front axle, tires, wheels, etc. When abnormal conditions occur during driving (such as noise, running deviation, vibration and abnormal damage), stop the vehicle immediately and do a thorough inspection to calibrate the items relating to the following:
a. If pressure of tires is normal;
b. If tires have non-uniform wear;
c. If tires are in unbalanced or damaged;
d. If the fasteners of each bracket are loose;
e. If steering components are worn and loose, such as tie rod high enough) is invalid. Check whether the oil leakage is resulted from
the damage of oil seal or the sealing washer. If it is, replace the washer.
The damper makes noises - It is resulted from the deformation of the dust proof cylinder or insufficient oil of damper for the damper collides with the leaf spring and the frame. Replace the damper or add oil.
f. If suspension components are damaged and loose, such as wear resisting washer between lifting lug and leaf spring eye or bracket;
g. If front axle and wheel alignment is correct;
h. If lubrication failure and oil, water or air leakage.
i. If the cylinder type shock absorber is malfunction.
3) Service and maintenance
a. Leaf spring plate and clip should be replaced in time.
These components are prone to be damaged under overload and severe road conditions. Once damaged parts are found, replace or repair them immediately; otherwise it may lead to major accident.
b. Leaf spring stop bolt should be checked and lubricated timely so as to ensure normal operating of suspension system.
c. bolts, nuts and leaf spring center bolts should be retightened every 1,500 km according to relevant torque requirements.
d. Once stop block is damaged or missing, replace it timely; otherwise it may lead to excessive jumping of axle which will accelerate break of leaf spring plate.
e.If the wear extent of the wear block exceeds 50% total thickness or it fall off, replace it immediately; otherwise, the leaf spring seat will bedamaged, thus influencing the service life of the seat;
f. If resistance is insufficient or any sound occurs due to insufficient oil or leakage of telescopic shock absorber, immediately repair or replace it; otherwise, comfort of the truck will be greatly degraded and even serious accidents may occur.
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