Rear Axle Housing - Komatsu 930E-2 Shop Manual

REAR AXLE HOUSING

Read and observe the following instructions be-
fore attempting any repairs on propulsion system
components!
• Do not step on or use any power cable as a
handhold when the engine is running.
• All removal, repairs and installation of propul-
sion system electrical components, cables etc.
must be performed by an electrical maintenance
technician properly trained to service the sys-
tem.
• In the event of a propulsion system malfunction,
a qualified technician should inspect the truck
and verify the propulsion system does not have
dangerous voltage levels present before repairs
are started.
After the truck is parked in position for the repairs, the
truck must be shut down properly to ensure the safety
of those working in the area of the wheel motors, and
possibly the electrical cabinet and retarding grids. The
following procedures will ensure the electrical system
is properly discharged before repairs are started.
PREPARATION
1. Reduce the engine speed to idle. Place the selec-
tor switch in NEUTRAL and apply the parking
brake. Be certain the parking brake applied indi-
cator lamp in the overhead panel is illuminated.
2. Place the drive system in the REST mode by
turning the Rest switch on the instrument panel
ON. Be certain the REST warning lamp is illumi-
nated.
3. Shut down the engine using the keyswitch. If, for
some reason the engine does not shut down, use
the shutdown switch on the center console. Place
the GF Cutout Switch in the CUTOUT position.
(See Figure 3-1, page E3-2, Propulsion System,
for GF switch location.)
G05015 9/99
REAR AXLE HOUSING
4. Verify the LINK VOLTAGE lights are OFF. If they
remain on longer than 5 minutes after shutdown,
notify the electrical department.
5. Verify the steering accumulators have bled down
by attempting to steer.
6. Bleed down the brake accumulators using the
manual bleed valves on the brake manifold.
7. Open the battery disconnect switches.
Front wheels must be securely blocked to prevent
movement as brakes will be released.
All electrical cables and hydraulic hoses should
be marked prior to removal.
Close the shut-off valves on the hydraulic pumps
to reduce amount of oil loss from brake system.
Removal
1. Remove the dump body as outlined in Section "B".
Block up truck and remove rear tires as described
in this Section of the manual.
2. Loosen hose clamps and disconnect wheel motor
cooling air duct from connection on front center
of housing.
3. With the pump shut-off valves in the closed posi-
tion, remove drain plugs at bottom of brake as-
semblies and drain oil from disc brakes.
4. Disconnect hydraulic hoses at manifold (4, Figure
5-1). Cap fittings and plug hoses to prevent con-
tamination.
5. Remove covers from access holes (17).
6. Remove cable grips at right front corner from
wheel motor cables (7), air pressure sensor/rear
light (8) and speed sensor (9) harnesses. Slide
cable grips forward on cables.
7. Remove cable grip mounting cover and slide
forward for access to brake cooling line clamp
inside axle housing.
8. Disconnect brake system cooling lines (2 & 10) at
each brake back plate. Disconnect brake apply
lines (11). Cap and plug openings.
9. Remove clamps (3) securing brake hoses to spin-
dles.
10. Open rear access cover and remove wing nuts
securing duct tube to axle housing. Remove tube.
Rear Axle Housing G5-1