Komatsu 830E Shop Manual page 457

After servicing the steering control unit, hydrau-
lic steering lines should be checked for correct
hook-up before starting the engine.
4. Tighten all capscrews to standard torque.
Unplug and attach hydraulic lines to their proper
ports. Refer to Figure 5-10 for port locations.
5. Start engine and check for proper steering func-
tion and any leaks.
6. Replace access cover and secure in place with
capscrews and lockwashers.
Disassembly
The steering control unit is a precision unit
manufactured to close
complete cleanliness is a must when handling the
valve assembly. Work in a clean area and use lint
free wiping materials or dry compressed air. Clean
type C-4 hydraulic oil should be used during
reassembly to insure initial lubrication.
1. Allow oil to drain from valve ports.
2. Match mark gear wheel set and end cover to
insure proper relocation during reassembly.
Refer to Figure 5-11.
FIGURE 5-10. DISASSEMBLY PREPARATION
1. Valve Assembly
2. Match Marks
L05026
tolerances, therefore
3. Capscrew with Pin
4. End Cover
Steering Component Repair
3. Remove end cover capscrews and washers.
Remove capscrew with rolled pin (3, Figure
5-11). Mark hole location of capscrew with
rolled pin on end cover to facilitate reassembly.
4. Remove end cover (4) and O-ring (2, Figure 5-
12).
5. Remove outer gear of gear wheel set (1) and
O-ring between gear set and distribution plate.
6. Lift inner gear off cardan shaft.
7. Remove cardan shaft (11, Figure 5-18), distribu-
tion plate (15) and O-ring (14).
8. Remove threaded bushing (4) and ball (3).
9. With valve housing positioned with the spool
and sleeve vertical, carefully lift spool assembly
out of housing bore.
Note: If housing is not vertical when spool and sleeve
are removed, pin (9) may slip out of position and trap
spools inside housing bore.
FIGURE 5-11. COVER END O-RING
1. Gear Wheel Set
10. Remove O-ring (5), kin ring (6) and bearing
assembly (7).
11. Remove ring (8) and pin (9) and carefully push
inner spool out of outer sleeve.
12. Press the neutral position springs (10) out of
their slot in the inner spool.
13. Remove the dust seal (2, Figure 5-13) using a
screwdriver. Take care not to scratch or damage
the dust seal bore.
2. O-Ring
L5-13