Johnston VM502, Maintenance Manual

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V Range 502
l
652
l
802 Maintenance Manual
MA1:14
Chapter - Scheduled Maintenance
Filter Regulator Unit
Comprises of a combined air filter/pressure regulator. It is mounted in the systems locker.
MO2MA-052
B
D
C
A
IN
The Air Filter Regulator Unit incorporates The following features;-
(A) Pressure regulator ensures the equipment is not over pressurised. It is factory set and sealed at
7
.
5 bar (108 psi).
(B) Isolation/drain valve, automatically dumps accumulated water when the machine is shut down or
when the air supply is isolated by the shut off valve
(C) Pressure switch is fitted to illuminate the low air pressure warning lamp on the JVM.
(D) Service connection enabling the system to be charged using a workshop air supply.
Pneumatic Cylinder Maintenance
Periodically inspect the cylinder rods for damage, blemishes or build up of material such as tar,
cement, paint etc. The rods can be cleaned with fine wire wool and/or spirit and should be kept clean
to ensure long seal life.
Hydraulic Cylinder Maintenance
Observe the notes on damage etc. described under pneumatic cylinders.
Avoid playing the water washdown hose or high pressure hand lance over the body tip cylinder when
in the fully raised condition.
PNEUMATICS
CAUTION:
The shut off valve must be used when servicing any item on the air system