4-31
There is water in the hydraulic
oil
Replace oil
Oil level is too slow
Refill the oil till the normal level
14.Hydraulic
Oil
pressure is too slow
or no pressure
Hydraulic pump is damaged
Consult with agent
Oil level is too slow
Refill the oil
Safety valve is trouble
Consult with agent
15.All the
Components are not
run
Hydraulic pump is damaged
Consult with agent
A.Oil pump make
noises
Lack of hydraulic oil
Refill oil
Air sucked for oil-intake pipe
Repair or replace
B.oil pump noises is
normal
Auxiliary pump is damaged
Replace
Hydraulic safety control unit
can’t
Check and repair
16.Every cylinder or
motor running weakly
or can’t run
Hydraulic pump is damaged
Consult with agent
Main safety valve pressure
turns low
Readjust the pressure.
Oil pressure and level is too
low
Refill oil
Oil suction filter is plugged
Clean oil filter
Oil seal is damaged
Repair or replace.
Piston rod is damaged which
cause oil leakage
Repair or replace.
Pilots valve is trouble
Replace
Pilots pipe damaged or oil
leakage
Repair or replace
17.Both travel motor
don’t work
Oil mixed in the center slewing
joint
Consult with agent
18.One of the travel
motor doesn’t work
Travel unit is damaged
Consult with agent
Controller is damaged
Check and repair
19. Travel unmorally
Crawler is too tight or loosen
Readjust crawler tension
Capability of the oil pump
lowered
Consult with agent
Crawler frame is damaged
Repair or replace
There is rock or crushed in
crawler chain
Remove foreign parts
Oil leakage in control valve
Consult with agent