Pinguely-Haulotte HA20PX, Repair Manual

Page: 271 / 282

CORRECTIVE MAINTENANCE SHEET
Folio 1/1
CHANGING THE EMERGENCY HYDRAULIC CIRCUIT
PRESSURE LIMITER
Sheet C114
Attention !
Ensure that the oil is not too
hot.
Attention !
Use a container to collect oil
to prevent pollution of the
environment.
.
2
3
1
15 - Preliminary operations
• Put the machine in the maintenance configuration (see corresponding para-
graph).
• Switch off electric power (see corresponding paragraph).
16 - Removing the emergency circuit pressure limiter
• Disconnect the return hose (1) of the emergency circuit at the pressure limiter
(2).
NB: Unscrew the hoses slowly to release residual hydraulic pressure.
• Put a cap on the hose.
• Remove the pressure limiter (2) by unscrewing the adapter (3).
• Retain the pressure limiter’s union and adapter.
17 - Installing the emergency circuit pressure limiter
• Put the union and adapter on a new pressure limiter.
• Install the pressure limiter by screwing the adapter onto the rigid pipe of the
emergency motor.
• Reconnect the hydraulic hose.
• Put the machine back in the operational configuration.
• Do not start the thermal motor and trip the emergency electropump unit.
• Make several movements to purge the hydraulic circuit.
• Adjust the pressure limiter if necessary (see «adjusting a pressure limiter»
sheet).
• Put the machine back in the operational configuration.
• Check the level in the hydraulic oil tank.