Wilorton Holding MK-C-10-BM SERIES, Operation Manual, Page: 106 / 416

8.2
Fault Cause possible Remedy
The crane boom cannot hold the load and
kreep down considerably
Permanent vibrations while operating on all
the movements
Considerable reduction in the speed of the
movements
The pilot operated check valve fitted on the
lift cylinder in question leaks
Oil leakage inside the cylinder concerned
Insufficient hydraulic oil
Clogging of hydraulic oil filter
Suction hose obstructed
Inefficient pump
Low speed of the engine
Radio and/or distributor system
malfunctioning
Inefficient pump
Have the valve checked and/or replaced
by an authorized repair workshop
Have the seals inside the cylinder replaced
by an authorised repair workshop
Add hydraulic oil to the tank (see para.
“Checking the hydraulic oil level”)
Replace the filter cartridge (see para.
“
Filters replacement” )
Locate the cause of the obstruction and
remove it
Check the pump flow; if it is not regular
replace the pump
Check the exact speed of the vehicle’s
engine on the basis of the hydraulic boom
extension time
Consult an authorised workshop
Check the pump flow; if it has decreased,
replace the pump
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MK-C-10-BM-317.1/1-EM