Doosan DISD SD 310 User Manual

Basic faults and overcoming
S/N
Faults
Reasons
Overcoming methods

Working pressure is not
enough
Pressure of relief valve is
regulated too low
Adjust pressure of relief valve
Slide valve of relief valve is
blocked
Dismantle, clean and assemble again
Pressure regulation spring is
broken
Replace with new one
System pipe pressure is lost too
much
Replace pipeline or regulate pressure
of relief valve within the allowable
pressure range
2
Working flow is not
enough
Oil supply of the system is not
enough
Check oil source, check oil pump
Leakage in valve is large
a. Oil temperature is too high,
viscosity decreases
a. Take measures to reduce oil
temperature
b. Selection of oil is improper
b. Replace oil
c. Clearance between slide valve
and valve is too large
c. Replace slide valve according to
reasonable clearance
Fault of relief valve
Repair relief valve

Resetting does not work
Resetting spring is damaged or
deformed
Replace new ones
There is pollutant between valve
rod and valve
Clean parts

External leakage
Sealing ring is damaged
Replace new ones
Fasteners are loosed
Screw down fasteners

Slippage of swing arm
is large
Clearance between muti-way
valve and valve rod increases
Replace valve rod

Rotating bucket falls
Overload valve or oil
compensating valve is blocked by
pollutant
Dismantle, clean and reassemble
Main Control Valve SPC000014
Page 7

Doosan DISD SD 310 Specifications

General

Brand	Doosan
Model	DISD SD 310
Category	Compact Loader
Language	English