Pinguely-Haulotte HA20PX, Repair Manual

Page: 275 / 282

CORRECTIVE MAINTENANCE SHEET
Folio 1/2
CHANGING THE TURNTABLE ROTATION REDUCING GEAR
Sheet C117
3
1
1 - Preliminary operations
• Lift the boom to enable access to the turntable rotation reducing gear (1).
• Wedge the boom to take its weight (place on firm supports).
• Put the machine in the maintenance configuration (see corresponding
paragraph).
• Switch off electric power (see corresponding paragraph).
• Remove the turntable rotation hydraulic motor (5) (see corresponding
sheet).
2 - Removing the turntable rotation reducing gear
• Release then unscrew the counter-nuts and screws (2) as far as possible.
• Tighten the screws (2) as far as possible.
• Release the counter-nuts from the two screws (3).
• Unscrew the two screws (3) by a few turns, without removing them.
• Remove the four fixing screws (4) from the turntable rotation reducing
gear (1).
• Put in slings then remove the turntable rotaton reducing gear (1).
• Remove and retain the adjustment screws (2) with their counter-nuts.
3 - Installing the turntable rotation reducing gear
• Put back the adjustment screws (2) and (3) with their counter-nuts on the
new reducing gear (without blocking them) so that the heads are as flush
as possible.
• Position the new reducing gear on the turntable.
• Put back the reducing gear’s four fixing screws (4) without blocking them.
• Adjust the position of the reducing gear using the adjustment screws (2)
and (3):
- Turn the reducing gear to position the ring teeth marked with a colour
opposite the reducing gear pinion (this coloured mark corresponds to the
most excentric point of the ring).
- Adjust the gap between the teeth to 300
µ
m with a set of flakes.
- When the gap is set, block the counter-nuts of adjustment screws (2) and
(3).
• Block the reducing gear’s four fixing screws (4) to a torque of 196 N.m
(144.56 lb.ft).
4 - Additional operations
• Put back the turntable rotation hydraulic motor (5) (see corresponding
sheet).
• Remove the wedges from the boom.
• Put the machine back in the operational configuration.
• Make several turntable rotation movements to purge the hydraulic circuit
and check reducing gear operation.
• Check the level of the hydraulic oil tank.