Fashion Bag The fastest solution to the failure of final drive

The fastest solution to the failure of final drive

Problem 1

The travel motor does not rotate

1)Possible failure factor

The failure of components other than the travel motor and reducer causes the travel motor not to rotate

1)Solution

At this time,it is necessary to carefully check whether there is pressure in the oil inlet of the travel motor, such as the leakage of the central swing joint and the stuck travel valve stem.

2)Possible failure factor

The piston,cylinder block and valve plate of the travel motor are too worn, or the connection with the main shaft of the travel reducer is worn or broken,resulting in no work.

2)Solution

This situation requires inspection and repair or direct replacement of damaged parts.

Problem 2

The travelling speed is slow and the speed cannot be increased

1) Possible failure factor

In addition to the failure of the travel motor itself, the most common reason is that the hydraulic pump pressure is too low or the flow rate is too low due to the wear of the hydraulic pump or main control valve, which leads to slow travelling speed.

1)Solution

At this time, it is necessary to check whether the oil inlet pressure of the travel motor meets the standard, or check and repair the hydraulic pump and main control valve.

2) Possible failure factor

The volumetric efficiency of the travel motor is reduced and the piston,cylinder block is worn, resulting in an excessively slow travel speed.

2)Solution

In this case, it is necessary to check whether the fault is caused by the wear of the swash plate, piston and cylinder block.

3) Possible failure factor

The travel motor balance valve is stuck by foreign objects or the spring is damaged, resulting in slow speed.

3)Solution

In view of this situation, it is necessary to check whether the balance valve is worn and whether the spring is damaged, and finally repair or replace it.

Problem 3

Final drive can’t stop travelling and the vibration is big when it stops

1)Possible failure factor

The drive valve stem does not return and is stuck or is not closed tightly, which leads to walking all the time.

1)Solution

Check and service valve stem or replace.

2)Possible failure factor

The balance valve spring is damaged or the travel motor brake cannot be closed completely, causing abnormal noise.

2)Solution

Repair or replace damaged parts.

Problem 4

Final drive only at high speed or only at low speed

1)Possible failure factor.

The inability to change the speed is mainly because the travel speed solenoid valve or the valve core is stuck, and the other point is that the travel speed cannot be changed due to the line failure.

1)Solution

At this time, only the solenoid valve assembly can be repaired or replaced.

2)Possible failure factor

The speed of the travel motor is stuck and the speed cannot be changed.

2)Solution

Clean or repair the travel motor speed spool.