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4. Disconnect and remove the hose at the alterna-
tor end and swing clear of work area.
5. Close the shut-off valves (2 & 10, Figure 3-1).
Always maintain complete cleanliness when
opening any hydraulic connection. Ensure that
all system lines and components are capped
while the component is removed from the truck.
6. Cap or cover all lines and pump inlets and out-
lets to prevent contamination.
7. Remove the cap screws securing the hoist
pump drive flange to the drive shaft.
8. Loosen the cap screws securing the inlet hoses
(3) and outlet hoses (6) on the hoist pump and
allow oil to drain. Remove inlet and outlet
hoses.
The hoist pump weighs approximately 128 kg
(282 lbs). The hoist and steering pump together
weigh approximately 227 kg (500 lbs). Use a suit-
able lifting or support device that can handle the
load safely.
9. Attach a suitable lifting or support device to the
hoist pump capable of handling approximately
113 kg (250 lbs). Attach a support to the front
end of the steering pump to hold it in place dur-
ing removal of the hoist pump.
10. Remove the four cap screws securing the hoist
pump to the front support bracket. Remove the
six cap screws holding the support bracket to
the "T" bracket and remove support bracket.
L3-4
11. Make sure the lifting and support devices are in
place on both pumps. Loosen (but do not
remove) the rear support bracket cap screws
holding the steering pump. Lower the pumps
allowing hoist pump to come down further than
steering pump.
12. Remove the four cap screws (10, Figure 3-2).
Slide hoist pump forward to disengage the
splines of drive coupling (9) from the steering
pump.
13. Move pump to a clean work area for disassem-
bly.
Installation
NOTE: The following procedure assumes the
steering pump is already in position on the truck.
1. Install O-ring (16, Figure 3-2) to steering pump
(11). Install coupler (9) to hoist pump. If
removed coupler has a snap ring, remove the
snap ring and dispose.
The hoist pump weighs approximately 128 kg
(282 lbs). The hoist and steering pump together
weigh approximately 227 kg (500 lbs). Use a suit-
able lifting or support device that can handle the
load safely.
2. Attach a suitable lifting or support device to the
hoist pump capable of handling approximately
113 kg (250 lbs). Move pump into position in
truck.
3. Lubricate the steering pump spline shaft and
align with coupling (9). Install hoist pump to
steering pump and install cap screws (10) with
hardened washers and tighten to standard
torque. Raise pumps up into position.
Hydraulic Component Repair
L03039
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