Operation and maintenance manual

Section 230-0000
Body System - Body System Schematic
SM 1407 Rev 2 11-01
2
Pressure Test Points
There are two pressure check points within the body
hoist system. Pressure readings at these points should
be as follows:
Test Point A - Located in the manifold at the rear left
hand side of the tractor frame. The pressure is taken
off the outlet tube from port 'EF' in the flow amplifier
valve.
System Relief Pressure - 172 bar (2 500 lbf/in²)
Test Point B - Located in tee piece at port 'U' of pilot
supply valve (5).
Pilot Valve Pressure - 30 bar (435 lbf/in²)
d. Where a tube is fitted, ensure that the connection is
aligned correctly.
e. Tighten the nut a further 1/4 to 1/2 a turn using the
correct size of spanner (wrench).
f. Check that a satisfactory hose or tube routing has
been achieved.
MAINTENANCE
Maintenance instructions, intervals and warnings
contained in the individual component sections of this
manual should be strictly adhered to.
Hydraulic Oil
The hydraulic tank should be kept filled with hydraulic
fluid as specified in Section 300-0020, LUBRICATION
SYSTEM. Refer to Section 230-0040, HYDRAULIC
TANK for correct fill level and procedure.
SERVICE TOOLS
It is recommended that the following tools are used
when carrying out pressure or temperature checks
during maintenance procedures. These tools, along
with other general service tools, are available from
your dealer. Refer to Section 300-0070, SERVICE
TOOLS, for part numbers of these tools.
Multi-gauge
The multi-gauge is basically four pressure gauges in
one. Continuous system pressure readings are
indicated on one of three simultaneously reading
gauges through a pressure range of 762 mm (30 in)
of vacuum to 345 bar (5 000 lbf/in
2
).
Non-contact Infrared Thermometer
The infrared thermometer can be used to spot heat
problems early in electrical, mechanical and
hydraulic systems. Hand held and easy to use, you
simply aim, pull the trigger, and read the temperature.
Since there is no need to touch what you are
measuring, temperatures of hard-to-reach or moving
components can be taken without getting burned or
shocked.
SM - 1335
Fig. 2 - Assembly of Typical ORFS Connector
'O' RING
'O' RING
SLEEVE
TUBE
FITTING
NUT
Body Control Valve - Pilot Pressures
Position Port 'P1' Port 'P2'
Raise 30 bar 0 bar
Hold 0 bar 0 bar
Float 0 bar 30 bar
Lower 0 bar 13.5 bar
'O' RING FACE SEALS (ORFS)
Where hydraulic lines are fitted with ORFS
connections, the following procedure should be
carried out during installation. Refer to Fig. 1.
a. Ensure 'O' ring/seal is in place and that joining
surfaces are clean. If necessary, retain 'O' ring/seal
in place with a light coating of grease or vaseline.
b. Initially, the nuts should be tightened by hand.
c. Where a hose is fitted, ensure that it is not twisted
or kinked when the nuts are tightened so that it is
allowed to adopt a natural position.