SUNWARD SWDE120B-3 - Page 81

OPERATION & MAINTENANCE MANUAL SWDE120B-3
75
Changing Interval Time Recommendation
Part to be changed regularly
Interval
Time
(year)
Engine
Fuel hose(from fuel box to precipitator, from precipitator to
oil-line pump)
1.5
Main
structure
Parts
Pump intake hoses(from working oil tank to main pump)
2
Pump outlet hoses (from pump outlet to main control valve)
2
Main control valve working oil gate hoses (from main control
valve to working components)
2
Low pressure hoses(Pilot hoses, oil return hoses)
2
Working
Assembly
Parts
Kelly frame lifting oil cylinder hoses
2
Compensation oil cylinder hoses
2
Rotary head hoses
1.5
Attention: Change the sealants such as O-rings etc. when changing hoses.