UT
Handbook for Use and Maitenance – 50000 WB-80-87-95
Edition
01/11
Revisione
00
39
50000WB_e111_E.doc
3.3.2 - EVERY 100 HOURS OF OPERATION
Lubricate the sliding shoes of the extension boom:
•
For the front shoes, spread grease on the lower surfaces of the extensions (Picture
31).
•
For the internal shoes, spread grease by slightly (not fully) extending the hydraulic
extensions through the holes on the upper part of the extensions (Picture 31);
repeat the procedure for each extension.
•
On completion of each greasing phase, move the extensions backwards and
forwards to ensure even spreading of grease.
•
Insufficient lubrication may cause irregular action of the extension cylinders.
•
Lubricate the rotating joint of the hook and its articulations.
DANGER OF SQUEEZING
•
Slew bearing greasing: Start greasing from grease nipple (zerk) 1 (picture 30),
grease by rotating the bearing for 180° back and forwards several time. Then use
grease nipple (zerk) 2 and rotate in the opposite direction for 180° back and
forward several times. This system will spread evenly the grease over all the 360°
of the bearing circumference.
Pay attention to the moving parts.
•
Through the grease nipples (Zerks), on the side, grease the stabilisers and also the
pin of the 3 points linkage.
3.3.3 - EVERY 200 HOURS OF OPERATION
•
Lubricate all the articulation pins through the relevant nozzles (see diagram in
Picture 31).
DANGER OF SQUEEZING
•
Grease the rotation bearing, through the grease nipples installed on the external
ring. Do the operation in more times, by rotating the turret more times in order to
distribute the grease on all the circumference.
Pay attention to the moving parts.
•
Grease the top bearing of the gear-box, through the grease nipple located on the
pinion, it can be reached by taking off the pinion cover or by taking of the plug on
top of the pinion cover.
•
Lubricate the slots of the extension cylinder attachments in the moving areas.
•
Lubricate the stabiliser cross members by spreading the special grease in the areas
of friction.
•
Lubricate all the joints.
•
Check the torque of the fixing bolts of the power take off and pump.
•
Check and clean the oil filter as described above.
3.3.4 - EVERY 600 HOURS OF OPERATION OR AT LEAST ONCE A YEAR
•
Check the pressures of the pilot stop valve seals (with suspended load and motor
off, when manoeuvring the crane in all possible directions nothing must move) and
check setting of the limiting device.
