10
SERVICE
INTERVAL
MEASURE
Cables and hoses
Before each use
Check that all cables and hoses are intact.
Screws and bolts
Regularly, preferably
before each use
Check and retighten all bolts and screws.
Moving parts.
After each use
Grease moving parts regularly.
Hydraulic oil
Regularly
Always check the quality of the oil in the tractor's hydraulic system.
Dirty oil must not be used and must be changed before connecting
the grapple loader to the tractor.
TROUBLESHOOTING
CAUSE
MEASURE
The grapple loader won't
move or all its functions
are slow
Low oil level
Leaking hydraulic system
Defective valves, hoses or
cylinders
Check the hydraulic system, refill with oil if necessary.
Check all hoses, valves and cylinders.
Replace broken or defective parts.
One or more functions in the
grapple loader are too weak.
Low oil pressure
Worn relief valve or seals
in cylinder
Check the pressure using a manometer.
Switch the hose with one used for another function to
determine if the fault is in the valve section or cylinder (do not
forget to reconnect the hoses after checking). If the function
works after the hoses have been switched, then the fault is
in the valve section. If the fault persists, check the cylinders.
ROTATOR
USAGE RESTRICTIONS
(Safety instructions when working)
•
Check the rotator's maximum permitted load and the load weight.
•
Do not overload the rotator!
•
Make sure the hydraulics have reached working temperature.
•
Check movement speeds and directions as well as control lever function.
•
Lift the load before moving and rotating it.
•
Never leave a load unsupervised during lifting.
•
When there is no pressure in the rotator, there is no braking torque and the load may
rotate due to factors such as wind or imbalance. A counter movement has to be used if
this rotation is to be stopped.
•
Check that the hydraulic hoses do not touch any obstacles. A broken hose or nipple can
cause the load to fall or rotation to continue.
•
When in transit or in storage, position the crane so that it is not supported by the rotator.
For example, the crane boom must not be allowed to rest against the rotator.