EKKO EK18A, Руководство по обслуживанию

Страница: 14 / 41

12
4. Steering gear failure Replace the steering gear
No action of
oil cylinder
(low pressure
or no
pressure)
1. There is foreign matter stuck
between the overflow valve or
overload valve main spool and valve
seat Clean valves, fuel tanks, pipelines, etc
2. The damping hole is blocked Hydraulic oil pollution is serious,
clean the hydraulic system
3, the cone spool has abnormal wear Inspect for wear and replace relief
valve assembly
4, pressure regulating spring
deformation Check spring quality
5. The adjustment screw of the relief
valve is loose After adjusting the pressure, tighten
the nut according to the specified
torque
6. Oil pump failure Replace the oil pump
The relief valve
has vibration
and dynamic
and noise
1, the hydraulic system has air The system will be discharged after
repeated operation for a while
2. The pump inhales air Check oil absorption test of oil pump
3, suction pipeline resistance is too
large or the suction side of the oil
pump produces negative pressure Check the cause of negative pressure
4. The oil suction filter is blocked Clean the oil filter and filter the oil
5, the relief valve has a pressure point
vibration and noise Adjust relief valve, slightly raise or
lower pressure gauge 1 ~ 2 scale grid
There is no
self-lock in
forward tilt or
the self-lock
in forward tilt
exceeds the
standard
1, the oil is not clean, so that the
forward control small spool stuck Clean valves, fuel tanks, pipelines, etc
2, the wrong oil port Switch the wrong oil connection
•
2.1.7
Gear pump failure reasons and troubleshooting methods
Failure cause maintenance
Pump suction
oil or oil
1. The flow area of the oil suction filter
is small or blocked by foreign bodies Replace the filter with a suitable flow
area or clean the blocked filter