Operation and maintenance manual

Section 210-0050
Cooling System - Disc Brake Oil Cooler
SM 2153 7-02
2
3. Remove blanking cap from remote drain line at the
bottom of the hydraulic tank. Install a length of hose on
remote drain fitting, open drain cock and drain hydraulic
oil into a suitable container. Close drain cock, remove
hose and reinstall blanking cap.
4. Remove blanking cap from remote drain line at the
bottom of the brake coolant tank. Install a length of
hose on remote drain fitting, open drain cock and drain
brake cooling oil into a suitable container. Close drain
cock, remove hose and reinstall blanking cap.
5. Remove bolts (15) securing rear guard assembly (9)
to casing (6). Remove rear guard assembly (9).
6. Clean disc brake oil cooler and surrounding area with
a suitable solvent. Ensure all hydraulic lines connected
to hydraulic motor (10) are identified for ease of
installation and, with suitable containers available to
catch leakage, disconnect hydraulic lines. Fit blanking
caps to all open lines.
7. Ensure all brake cooling lines connected to oil cooler
(3) are identified for ease of installation and, with
suitable containers available to catch leakage,
disconnect brake cooling lines. Fit blanking caps to all
open lines.
8. Identify and tag all hydraulic lines connected to two
speed control valve and relief valve mounted to casing
(6), to aid in 'Installation'. With suitable containers
available to catch leakage, disconnect hydraulic lines.
Fit blanking caps to all open lines.
9. Remove bolts (1) securing front cover (2) to casing
(6). Remove front cover (2).
10. Remove bolts (11), washers (12), isolation mounts
(13) and nuts (14) securing disc brake oil cooler to
fender.
11. Using suitable lifting equipment, remove brake oil
cooler from the vehicle to a clean area for
disassembly.
DISASSEMBLY
Numbers in parentheses refer to Fig. 1.
1. Remove bolts and washers securing two speed
control valve to casing (6). Remove two speed control
valve.
2. Remove bolts and washers securing relief valve to
bracket on casing (6). Remove relief valve.
3. Remove bolts and washers securing fan plate
assembly (8) to casing (6). Carefully remove fan plate
assembly (8), complete with fan (7) and hydraulic
motor (10) from casing (6).
4. Carefully remove fan (7) from hydraulic motor (10)
shaft.
5. Remove nuts securing hydraulic motor (10) to fan
plate assembly (8). Remove the hydraulic motor (10).
6. Loosen and remove nuts securing oil cooler (3) in
casing (6). Carefully remove oil cooler (3) from casing
(6).
MOTOR OVERHAUL
Numbers in parentheses refer to Fig. 1.
Internal parts of the hydraulic motor (10) are lubricated
by the operating fluid itself; therefore, preventive
maintenance is limited to keeping the fluid in the
system clean. Dirt should not be allowed to accumulate
on the motor or around the shaft seal. Check frequently
that all fittings and bolts are tight.
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners without special torques
specified, to standard torques listed in
Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
WARNING
To prevent personal injury and property
damage, make sure blocking or lifting
equipment is properly secured and of adequate
capacity to do the job safely.
Generally assembly is the opposite of disassembly. Be
careful not to damage oil cooler (3) when installing in
casing (6).
Note: Ensure there is even clearance, all the way
round, between fan (7) and fan plate assembly (8).
INSTALLATION
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners without special torques
specified, to standard torques listed in
Section 300-0080, STANDARD BOLT AND NUT