Operation and maintenance manual

Section 210-0046
SM 2164 Rev 1 10-03
2
Cooling System - Low Pressure Relief Valve
bottom of the brake coolant tank. Install a length of
hose on remote drain fitting, open drain cock and drain
oil into a suitable container. Close drain cock, remove
hose and reinstall blanking cap.
4. Clean low pressure relief valve body and
surrounding area with a suitable solvent. Ensure that
no contaminant is allowed to enter the internal
galleries. Identify and tag all hydraulic lines connected
to the low pressure relief valve, to aid in 'Installation'.
5. With suitable containers available to catch leakage,
disconnect hydraulic lines. Fit blanking caps to all
open lines.
6. Remove bolts securing low pressure relief valve to
brake coolant tank. Remove low pressure relief valve.
Fit blanking cap to open port in brake coolant tank.
DISASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. Note position of all hydraulic connectors prior to
removing them from valve body.
2. To remove relief valve cartridge(s) (1), remove the
retaining circlip, taking care not to damage the bore.
3. Remove damaged or worn relief valve cartridge(s)
(1).
INSPECTION
Numbers in parentheses refer to Fig. 1.
1. Clean all parts with a suitable solvent and dry with
compressed air.
2. Check ports threads and make sure they are not
damaged or stripped.
3. Check cartridge valves (1) seats. Ensure they are
not worn, nicked, cracked or scored.
It is not recommended that any of the cartridge
assemblies (1) are disassembled for maintenance
purposes.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. Replace all 'O' rings on hydraulic connectors.
2. Replace relief valve cartridge(s) (1) and secure with
retaining circlip.
3. Install hydraulic connectors to valve body in correct
orientation.
INSTALLATION
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners to standard torques listed
in Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 250-0000,
BRAKING SYSTEM SCHEMATIC. Renew all 'O' rings
where used.
1. Remove blanking cap from tank and secure low
pressure relief valve to mounting surface on brake
coolant tank with bolts. Renew 'O' ring.
2. Remove blanking caps from hydraulic lines and
install lines to the low pressure relief valve as identified
during removal.
3. Fill brake coolant tank with oil as specified in
Section 300-0020, LUBRICATION SYSTEM. Refer to
Section 250-0025, BRAKE COOLANT TANK, for oil
level. Install filler cap on brake coolant tank filler neck.
4. Place the battery master switch in the 'On' position,
start the engine and bring hydraulic oil to operating
temperature.
5. Check low pressure relief valve and hydraulic line
connections for leaks and tighten as required.
6. Remove all blocking from road wheels and place
steering lock bar in the stowed position.
SPECIAL TOOLS
There are no special tools required for procedures
outlined in this section. Refer to Section 300-0070,
SERVICE TOOLS, for part numbers of general service
tools required. These tools are available from your
dealer.
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