Komatsu 930E-2 Shop Manual page 381

7. Attach a suitable lifting or support device to the
hoist pump capable of handling approximately
250 lbs (113 kg). Attach a support to the front end
of the steering pump to hold it in place during
removal of the hoist pump.
8. Remove the four capscrews (2, Figure 3-2) secur-
ing the hoist pump to the front support bracket.
Remove the six capscrews holding the support
bracket (6) to the pump module support. Remove
support bracket.
9. Make sure the lifting and support devices are in
place on both pumps. Loosen (but do not remove)
the rear support bracket capscrews holding the
steering pump. Lower the pumps allowing hoist
pump to come down further than steering pump.
10. Remove the four steering/brake pump mounting
capscrews (4). Slide hoist pump forward to disen-
gage the splines of drive coupling (9, Figure 3-3)
from the steering pump.
11. Move pump to a clean work area for disassembly.
L03027
Installation
NOTE: The following assumes the steering pump is
already in position on the truck.
1. Install O-ring (16, Figure 3-3) to steering pump
(11). Install coupler (9) to hoist pump.
The hoist pump weighs approximately 250 lbs (113
kg). The hoist and steering pump together weigh
approximately 500 lbs (227 kg). Use a suitable
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
250 lbs (113 kg). 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 capscrews (10) with hardened
washers and tighten to standard torque. Raise
pumps up into position.
4. Attach front support bracket to the pump module
support structure and to the pump with cap-
screws, lockwashers and nuts. Tighten cap-
screws to standard torque.
5. Connect hoist pump drive flange to drive shaft with
capscrews, lockwashers and nuts. Tighten to
standard torque.
6. Tighten steering pump support bracket (7, Figure
3-2) capscrews to standard torque.
7. Uncap inlet and outlet hoses and install to pumps
using new O-rings. Tighten capscrews securely.
8. Service the hydraulic tank with C-4 type hydraulic
fluid. Refer to Hydraulic Tank this section for filling
instructions.
9. Open the three suction line shut-off valves. Loosen
capscrews (at the pump) on suction hoses to
bleed trapped air. Then loosen capscrews (at the
pump) on pressure hoses to bleed any trapped
air. Tighten all capscrews securely.
NOTE: If trapped air is not bled from steering pump,
possible pump damage and no output may result.
10. Reinstall blower duct and support bracket.
Hydraulic Component Repair L3-3