XCMG XDN450 Operation Manual page 99

!
5）Phenomenon: Increased oil temperature
No.
Unreasonable operation, the hydraulic system is
1 overflowing for a long time, and the system generates
heat
High work pressure
2
Leakage causes serious loss of volume
3
Hydraulic pipe joints age, causing pressure loss
4
Excessive friction between moving parts
5
Excessive oil viscosity
6
Small oil tank, poor heat dissipation conditions
7
Temperature rise caused by external heat source
8
6）Phenomenon: leaked
No.
Damaged or reversed seals
1
Loose fittings
2
One-way valve ball is not round, valve seat is
3
damaged
Mutual movement surface clearance is too large
4
Some parts wear
5
Pressure adjustment is too high
6
Oil viscosity is too low
7
Working temperature is too high
8
Causes
Causes
Measures
Reasonably operate the machine,
especially to prevent prolonged
pressure
Reduce work pressure reasonably
Reinforced seal
Replace pipe fittings
Improve the precision of parts
processing and assembly, reduce the
friction of the movement
Use low viscosity hydraulic oil
Increase fuel tank capacity, improve
heat dissipation conditions, set cooler
Isolated heat source
Measures
Replace the seal and correct the
installation direction
Tighten the fitting
Replace ball, with test seat
Replace some parts and reduce fit
clearance
Replace worn parts
Reduce work pressure
Use higher viscosity fluid
Reduce operating temperature or take
cooling measures
78