14
Oil
pump
noise
1. Most cases are caused by
insufficient oil absorption of oil pump,
such as blockage of oil absorption
filter; Oil level is too low; Inhalation of
air; Suction air at oil seal, etc
Keep oil level high and seal must be
reliable to prevent oil contamination
2. The return pipe is higher than the
oil level, and there are a lot of bubbles
in the oil
Immerse the return pipe below the oil
level
3. The viscosity of oil is too high and
the oil temperature is too low
Choose oil with proper viscosity
according to the season, or heat it up
4. The coaxial of the pump shaft and
prime mover shaft is too large
Adjust the coaxiality of the two axes
5. After maintenance, the driven gear
is inverted, and the meshing area
becomes smaller
Disassemble the oil pump and turn the
driven gear
Oil pump
temperature
rises too high
1, the pressure is too high, the speed is
too fast, the side plate burns
Properly adjust the overflow valve;
Reduce the speed to the specified
value; Repair the pump
2. The oil viscosity is too high or the
internal leakage is serious
Change the appropriate oil and check
the seal
3. The back pressure of oil return is
too high
Eliminate the cause of high return
back pressure
4, the fuel tank is too small, poor heat
dissipation
Increase the fuel tank
2.1.8 Other common faults and troubleshooting methods
Failure
cause
maintenance
Abnormal
sound during
exercise
1, hydraulic oil, gear oil and other oil
does not meet the requirements
Fuel until required
2, front and rear hub bearings loose,
broken
After tightening the bearing and
locking the nut, retract about 1/8 turn,
and the hub should be free to turn.
Fracture will renew the bearing
3, gearbox, gear, friction plate damage
replace
4, differential and cross shaft damage
replace
5. Fasteners are loose
Pry tight
