XCMG XDN450 Operation Manual page 98

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Directional
valve
3
Pipeline
4
5
Shock caused by shock and noise
Hydraulic system vibration caused by external
6
vibration
Vibration caused by motor and hydraulic pump
7
rotation
Hydraulic cylinder seal is too tight or machining
8
assembly error
Co-quake with other components
Electromagnet suction is not strict
Spool stuck
Bad electromagnet welding
Damaged or hard spring
Uneven internal diameter of hydraulic
hose
Loose or loose tube
Adjust pressure to avoid common
shock, or change the natural vibration
frequency of the vibration system
Repair electromagnet
Clean or rest valve bodies and spools
Resolder
Replace spring
Replace tubing
Refix the pipe
See table: 3. Phenomenon: Impact
Take earthquake-isolation measures
Take measures to reduce vibration
Appropriate adjustment of seal
tightness, replacement or repair of
defective parts, reassembly
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