MERLO P25.6, Instruction Manual, Page: 108 / 232

6 - ORDINARY MAINTENANCE
6 - 30
GENERAL MAINTENANCE
• INTRODUCTION
This chapter describes all the general maintenance operations to be performed on the machine based on its actual operating
conditions, without sticking to any rigorous schedule.
WARNING! Before carrying out the following, please, carefully read the instructions in the chapter ORDINARY
MAINTENANCE.
• SLIDING RUNNERS ADJUSTMENT OF THE TELESCOPIC BOOM
If play between the boom sections becomes excessive or the carriage isn't
correctly parallel to the ground the sliding runners of the boom need to be
adjusted as follows:
-
position the machine on a flat, perfectly level surface
- engage the parking brake
- correctly level the machine (if fitted with TILTING or SUSPENSIONS)
- remove the protective mufflers "P" from the lock nuts
- loosen the side runners and the lower M12 screws
-
hook a bridgecrane "C" to the end of the telescopic boom (as shown in the
photo) in order to lift the second boom section bringing it in contact with the
second boom section. Alternatively, it is possible to place the carriage on the
ground on a perfectly flat base, of small dimensions and centrally positioned
with respect to the boom. Lower the telescopic boom in order to lift the
second boom section bringing it in contact with the first. In both cases do not force the contact manoeuvre between the
booms so as not to risk damage to the structure of the telescopic boom.
- place a 1 metre long checking rod "X" symmetrically on the carriage
- position a spirit level "Y" in the centre of the rod "X"
- loosen all lower screws then tighten them to a torque of 1Kgm (7.24 quart) begining with those at the centre of each runner
and proceeding in a criss-cross fashion. Then tighten the side screws of both parts of the boom to a torque of 1Kgm again
proceeding in a criss-cross fashion;
- remove the bridgecrane or, if a base on the ground has been used, lift the telescopic boom.
-
check the planarity of the carriage with the spirit level "Y".
- if the carriage isn't level individual adjustment of the lower runner which is to be lowered needs to be carried out. To do this,
first all the side screws need to be loosened then the 2 lower external screws of the runner to be lowered need to be
unscrewed. Adjustment is done acting on the single central screw "G" until the spirit level shows that the carriage is
perfectly level. At this point the 2 lower screws and all the side screws need to be tightened to a torque of 1Kgm (7.24 quart)
- tighten all lock nuts
- completely extend the telescopic boom checking that the percentile of inclination of the boom never exceeds ±0,3%.