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Dongfeng Military Truck Adjustment and Maintenance - Adjustment of Chassis and Common Troubleshooting - Front Bridge

Views: 4     Author: Site Editor     Publish Time: 2021-09-22      Origin: Site

Seventh quarter bridge

First, the adjustment of the front bridge

1. Adjustment of the main pin axial pretensioning

When the adjustment should be tightened when the wheel pin is tightened when the main pin is fastened, and the main pin stop screw is tightened with 1 to 20n.m torque, so that the steel ball is pre-tightened between the steel ball and the main push ball bowl. Then tighten the nut with 98n.m torque

2, adjustment of the front wheel steering angle and the front bore

Adjust the limit screw on the steeringhell housing to make the front inner wheel maximum angle of angle of 37 °. By adjusting the horizontal pulley, the front beam value is 2 to 5 mm.

3. Adjustment method of the front bore:

1) Let the two lock bolts on the lever adjustment set first.

2) Rotating adjustment sleeve, make the front beam value of 0 to 2 mm ° specific measurement method: cross-rear cross-rear cross-rear joint point of the horizontal surface of the two front wheels and the wheel center, measure the two front words and two The distance between the post-cross, the difference in the front and rear value is the lead.

3) Tighten the adjustment set lock bolt.

Second, front bridge common fault and exclude

1, steering run: left and right tyre The air pressure is not equal, the difference is too large, and it should be re-inflated. The left and right hub bearing is adjusted, and the steel spring U-shaped bolts are restored and fastened.

2, steering weight: The steering section adjustment gasket is tightened, and the forward beam is adjusted as required, adjust the forward beam. Front axis deformation, correction or replacement. tyre Insufficient air pressure, inflatable according to the specified. The transverse tilt ball head is adjusted too tightly, and the re-adjustment of the main pin is pre-tightening, re-adjusting the main pin screw.

3, the front wheel is automatically returned: the main pin is inconsistent, and the relevant parts affecting the front wheel positioning is normal, if necessary, when the front wheel is inconsistent. Replace the main pin or bushing, adjust the front hub bearing a moving parts lubrication, check and add the grease.

4, front wheel rumor

When the car is driving at a high speed or traveling at a higher cycle, it is unstable. The vehicle is shaking, the steering wheel also has \"Hand \" phenomenon is divided into low speed rumors and high speed rumors, and most of the low speed rumors are due to the turn of the steering system. Excessive causes; high-speed rumors include the cause of low-speed rumors, and the wheel (including brake hub) imbalance, front wheel positioning, front wheel deformation and displacement displacement of steel spring can be summarized as the following table :

cause of issue

Troubleshooting

Steering wheel free corner

Check the assembly of the steering transmission shaft, the steering machine gap and the steering wheel, adjust

Improper adjustment

Re-adjust the forward lead to design requirements

Front wheel bearing adjustment is incorrect

Re-adjusted to design requirements

Front axle deformation

Correction or replacement

The horizontal rod ball head pin is too large, and it is loosened. Tighten the nut loose

Adjustment replacement

Turning the throttle pin and the main bearing gap

Replace sales or bushing

Front steel spring \"u \" bolts loose, front steel spring left, right or lower, vibration damper failure

Check the fastening or replacement one by one

Wheels (including brake drums) imbalance

Check adjustment or machining solution

Steering machine and frame connection bolts loose

Tighten to within the specified torque

The gap between the steering gear convection pair is too large, or overwear

Re-adjust or replace


This article is reproduced from: Dongfeng Truck Corporation Heavy Car Factory - \"Military Dongfeng off-road vehicle Adjustment and Maintenance Manual\"

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