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4.1.5 Engine maintenance
Please carry out periodic maintenance in the engine manual.
4.1.6 Periodic replacement of hydraulic hose
1) Make sure to carry out periodic inspection of machine to guarantee safe operation. If listed
parts are damaged, it may cause serious fire. Because it is difficult to judge the aging situation
of these parts by vision, you should replace them at listed intervals. However, if any part is
found bad in the inspection, it should be replaced before operation without consideration of
intervals. Also check the hose couplers, if they are distorted, cracked or aged, replace them if
necessary.
2) Make sure to check all hoses periodically, and replace them if necessary.
3) Consult your dealer about how to replace hose correctly.
Recommended periodic hose placement list
Periodic replaced parts
Replacement
Interval
Engine
Fuel hose (from fuel tank to precipitator, from precipitator to oil
feeding pump)
1.5 years
Pump inhaling hose (from oil tank to main pump) 2 years
Pump output hose (from pump outlet to multipurpose valve) 2 years
Multipurpose valve hose (from multipurpose valve to working
device, slewing coupler, slewing motor)
2 years
Machine
Body
Low pressure hose (pilot hose, oil-returning hose) 2 years
Boom cylinder hose 2 years
Arm cylinder hose 2 years
Working
Device
Bucket cylinder hose 2 years
Note: Make sure to replace seals (such as O ring) when replace hoses.
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