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Terex Terex accessories share with you the problem of steering wheel wobble during braking. In recent years, the dual steering front axle truck has been favored by users because of its good regulatory adaptability and its light weight and reasonable axle load distribution; However, due to the uneven research, production technology and supporting chain of each truck manufacturer, there are many problems for service stations and repair shops in the market with double steering front axle trucks. Face to face: 1 case.

● Fault phenomenon

Many double steering front axle trucks, dump trucks, and tractors often have some failures: when the vehicle speed exceeds 45km/h, step on the brake pedal normally, and the steering wheel swings back and forth at 2-4Hz. The driver cannot effectively control the steering wheel, and the braking effect is poor. Such faults greatly reduce the safety and comfort of the whole vehicle. After the user replaced the wheel hub, rim, brake, brake shoe and other components, the fault still exists

.

● Fault analysis

When a new car is undergoing the first level II chassis maintenance, the steering wheel swing frequency is the highest during braking after the disassembly and assembly of the front wheel hub. The instrument detects that the front wheel hub of the vehicle with the fault is out of round. The results show that the swing of the steering wheel is caused by the "out of round" wheel hub when the double steering front axle truck is braked. This article is from Zhimei Auto Repair

Use the wheel hub cutting equipment to repair the "out of roundness" of the wheel valley. After the wheel hub, rim and tire are reloaded, the fault still exists. The hub is then disassembled for inspection, and now the hub is "out of round" again. The results show that the "out of round" repair of a single pair of wheel hubs can effectively solve the problem of steering wheel swing when the dual steering front axle truck brakes.

Continue to analyze the cause: each time the repaired wheel hub is loaded, "out of round" occurs again. During this period, only one process was carried out, that is, rim screw tightening. Finally, it is confirmed that after single repair, the hub engages with the rim through the powerful tension of the rim screws, which will cause local deformation again, leading to "out of round", and the steering wheel will still swing when braking. Terex TEREX accessories

● Troubleshooting

First, engage and fasten the hub rim, and install the hub cutting equipment to repair the "out of roundness", so as to avoid the re tightening process of the hub rim. During the loading test, the steering wheel wobble disappears during braking.

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