To make lubrication of the vertical boom’s top head easier, the turning cylinders and
support legs have been scored. Before climbing atop the turning cylinder, extend the
boom directly backwards and attach it to the frame of the forestry trailer or lay it on the
ground. Lift the support legs into a horizontal position. The sliding boom is lubricated by
spreading vaseline on the boom’s sliding surfaces when they are fully exposed. Use
only high quality vaseline, example NESTE OH GREASE.
ADJUSTING THE SUPPORT BEARING OF THE GEAR RACK
Checking the tightness of the support bearings of the gear rack and the vertical boom's
tooth rim is essential to prevent breaking of the teeth. Check the adjustment after first
10 hours of operation and after it at intervals of about 100 hours. The recommended
clearance is 0.05 - 0.1 mm, which corresponds to a 10° - 20° turn of the tightening
screw. First loosen the lock nut and then tighten the tightening screw (torque 10 kPm).
After this open the screw about 10° - 20°. Finally screw the lock nut back and tighten it.
It is useful to check at times that the nut and screw have not turned loose by
themselves. If the loader is equipped with two gear racks, there are support bearings on
both sides of the slewing device.
POWERLESS LOADER MOTIONS
If the lifting power of the loader does not correspond to the values specified for it, check
the following points:
•
Measure the tractor take-out pressure: it should be over 185 bar.
•
Measure the pressure of the hydraulic return line; max. 5 bar, preferably under 2 bar.
If the pressure exceeds the maximum, arrange a free return line in the tractor.
However, observe the tractor manufacturer's instructions in connecting the return
line.
•
If the tractor take-out pressure is over 185 bar and the return line pressure is under
the maximum, check the loader's pressure limiting valves. Adjusting the loader's
valves must be entrusted to an authorized repair shop because the manufacturer's
guarantee will no longer be valid if the valves are adjusted improperly.
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