The axle is the core component assembly of the trailer, which is directly related to the load-bearing, braking and driving of the vehicle. If there is a problem with the axle, the safety, attendance and economic benefits of the vehicle will almost become empty talk. Therefore, it is particularly important to do a good job in the daily maintenance of the axle.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

If the owner is familiar with the structure, function and various parts of the axle, the daily maintenance can be operated by himself, and even some common small faults can be eliminated by himself, which can not only save the time of sending the vehicle for repair, but also save expenses and costs to a certain extent. However, compared with other parts, the structure of the axle is relatively complex, which leads to a relatively large workload of maintenance to a certain extent. Only with certain knowledge or technology can we better complete this work.

Therefore, Darong axle specially summarizes and combs the maintenance matters of the axle in daily use and the troubleshooting methods of some common faults for the majority of car owners for your reference.

Daily inspection and maintenance of axle

All safety inspections shall be carried out before the vehicle is running to avoid or prohibit driving with faults. The main inspection contents include: tire pressure, fastening of main bolts and nuts of wheel and suspension system, fracture of leaf spring or main beam of suspension system, working condition of lighting and braking system, air pressure condition of braking system and air suspension system, etc.

Every two weeks or in frost weather, it is necessary to open the drain valve at the bottom of the air reservoir to drain the accumulated water.

If it is a new car or new axle that has just been replaced, after the first load driving, it is necessary to check the fastening condition of the bolts and nuts of the wheel and suspension system to ensure that the specified torque can be reached.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

1. Check wheel nuts: after the new car is driven under load for the first time or after changing the wheel, check the fastening of wheel nuts / screw sleeves to ensure that the specified torque is reached.

Method: loosen nut D, tighten screw sleeve b, install and tighten nut D.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

2. Check the adjusting arm: it is recommended that the initial installation angle of the adjusting arm is 100 ° - 105 °, and the best braking angle is 90 °. It shall be adjusted every 15-30 days or every 5000-10000 km according to the use of the vehicle.

Method: pull the adjusting arm. If the stroke a value of the air chamber push rod is ≥ 35mm, the axle braking clearance needs to be adjusted; Turn the clearance adjusting screw clockwise until the brake is locked, and then turn it back 90 ° - 120 ° counterclockwise; Alternatively, the a value can be adjusted to 13% - 20% of the b value of the brake arm length with the help of the nut of the adjusting screw of the adjusting arm brake clearance.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

3. Check the brake shoe friction plate: it is recommended to check the thickness and looseness of the lower brake friction plate every month or every 10000 km. If the thickness of the friction plate is less than 5-6mm or looseness occurs, the friction plate must be replaced. The friction plate can be checked through the observation hole of the dust cover.

4. Check the brake drum: regularly check the brake drum every 3 months or according to the service condition of the vehicle. When the inner diameter of the brake drum is less than 422mm or the friction surface is cracked continuously, the brake drum shall be replaced in time.

5. Check the wheel hub bearing clearance: the wheel hub bearing clearance must be checked every three months for new vehicles. Regular inspection is recommended for non new vehicles. During the inspection, the axle can be lifted to make the tire leave the road, insert two crowbars between the tire and the ground, turn the wheel in the positive and negative directions, and check whether the sound is smooth, whether there is noise and whether the noise increases with the speed.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

6. Check or adjust the bearing clearance:

Double large shaft head series: loosen the hub cover; Remove the shaft head cotter pin; Use a special wrench to turn the wheel hub and tighten the shaft head nut at the same time. The torque to be specified is 350nm-400nm; Rotate the nut 1 / 7-1 / 6 in reverse direction and align the notch of the nut with the cotter pin hole; Insert a new cotter pin and bend the pin tail by 30 ° - 45 °; Install the hub cover and tighten the torque to 80nm-120nm.

German shaft head series: loosen the hub cover; Remove the shaft head cotter pin; Use a special wrench to tighten the shaft head nut with a minimum torque of 380 ± 10nm, and rotate the hub in reverse at the same time; Loosen the nut for one turn; Tighten the shaft head nut again with a torque of 70 ± 5nm / 90 ± 5nm; Align the notch of the shaft head nut with the cotter pin hole; Insert a new cotter pin and bend the pin tail by 30 ° - 45 °; Install the hub cover and tighten the torque to 80nm-120nm.

Large and small shaft head series: loosen the hub cover bolts and remove the hub cover; Straighten the two teeth locked by the locking gasket; Remove the locking nut, locking gasket and stop washer; Tighten the shaft head nut to the specified torque of 373 ± 10nm while turning the hub with a wrench; Loosen the nut of the shaft head for one turn; Tighten the shaft head nut again with a torque of 102 ± 5nm; Install the lock washer and loosen the shaft head nut 4.5-5 lock washer holes; Install the locking gasket and locking nut, and tighten the locking nut to the specified torque of 373 ± 10nm; Turn over and lock the two teeth of the locking gasket; Install the hub cover, washer and bolt and tighten them to the specified torque of 20-25nm.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

7. Axle lubrication:

Camshaft bushing: it is recommended to fill the lubricating grease every quarter or after maintenance. It can also be filled in advance according to the actual use situation until the lubricating grease overflows around.

Tapered roller bearing: it is recommended to add grease every half a year or after replacing the brake shoe, friction plate and hub, or in advance according to the actual situation. During filling, the bearing shall be thoroughly cleaned and checked for pitting, peeling, wear and other defects. If there are defects, it shall be replaced in time, and then a sufficient amount of grease shall be fully filled.

Hub cavity: it is recommended to fill it every six months, or after maintenance and replacement of the hub, or in advance according to the actual use. Pay attention to thoroughly clean the inner cavity of the hub, and then add an appropriate amount of grease.

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide

Common axle faults, cause analysis and Troubleshooting:

How to do the daily maintenance of trailer axle? Thank you for taking the detailed guide