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STEERING AND BRAKE PUMP
Removal
NOTE: Clean the steering pump and surrounding
area carefully to help avoid contamination of
hydraulic oil when lines are opened.
Relieve pressure before disconnecting hydraulic
and other lines. Tighten all connections before
applying pressure.
Hydraulic fluid escaping under pressure can
have sufficient force to enter a person's body by
penetrating the skin and cause serious injury and
possibly death if proper medical treatment by a
physician familiar with this injury is not received
immediately.
1. Turn the key switch OFF and allow 90 seconds
for the accumulators to bleed down. Turn the
steering wheel to be sure no oil remains under
pressure.
FIGURE 5-23. STEERING PUMP REMOVAL
1. Hoist Pump Outlet
Hoses
2. Mounting Cap Screws
3. Hoist Pump
4. Mounting Cap Screws
L5-28
5. Steering/Brake Pump
6. Shut-off Valve
7. Pump Mount Bracket
8. Outlet Hose
Steering Component Repair
NOTE: If oil in the hydraulic tank has not been
contaminated, the shut-off valve (6, Figure 5-23)
between the tank and steering pump can be closed,
eliminating the need to completely drain the tank.
2. Drain the hydraulic tank by use of the drain
located on the bottom side of the tank.
NOTE: Be prepared to contain approximately 901 l
(238 gal) of hydraulic oil. If the oil is to be reused,
clean containers must be used with a 3 micron
filtering system available for refill.
3. Disconnect the suction and discharge lines at
the steering pump (5, Figure 5-23). Disconnect
and cap pump case drain line from fitting at top
of pump housing. Plug all lines to prevent oil
contamination.
The steering pump weighs approximately 113
kgs (250 lbs). Use a suitable lifting device capa-
ble of handling the load safely.
4. Support the steering pump (5) and the rear sec-
tion of the hoist pump (3). Remove mounting
cap screws and rear support bracket (7).
Remove the four pump mounting cap screws
(4).
5. Move the steering pump rearward to disengage
the drive coupler splines from the hoist pump
and remove pump.
6. Clean exterior of steering pump.
7. Move the steering pump to a clean work area
for disassembly.
L05035
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