SUNWARD SWDM40 - Troubleshooting; Common Failures and Solutions

SWDM40 OPERATION & MAINTENANCE MANUAL
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9 TROUBLESHOOTING
9.1 COMMON FAILURES AND SOLUTIONS
Failure
Cause
Solution
Engine does not start
or difficult to start
Battery failure or low battery
Replace or Charge
Starter damaged
Replace
Poor Connection/short circuit
Check and Repair
See engine manual for other malfunction
Handles loose/slow
action
Air mixed in hydraulic system
Check air leakage and vent it
Hyd. oil temperature too low, too sticky
Pre-heating engine
Hydraulic oil ageing
Replace oil
System low pressure
Check hydraulic system
Cylinder no working
or work slowly
Pilot valve failure
Repair
Cylinder oil seal damaged
Replace
Overflow valve failure
Repair
Abnormal sound in
Rotary drive
meshing
Lubricating oil dirty and ageing
Filtering and Replace
Lubricating oil level too low
Filling lubricant
Gear damage, worn out
Replace
Bearing worn out
Replace
No signal from
gauges
Gauges damaged
Repair or Replace
Fuse Burnt
Replace
Poor connection/short circuit
Repair
Swing platform no
swing or slow swing
Pilot valve failure
Repair and contract with supplier
Changing valve and brake valve failure
Hydraulic motor failure
Swing bearing failure
Engine stops, boom
down no work or
work slowly
No pressure or low pressure in box-type
accumulator;
Add Nitrogen
Check valve oil leakage;
Check valve port