Cleaning And Inspection; Disassembly - Komatsu 930E-2 Shop Manual

Disassembly

1. Remove wheel hub and spindle as covered in
"Removal" before proceeding to Step 2. Clean
assembly to remove dirt accumulation.
2. To aid in complete disassembly of wheel hub and
spindle assembly, support assembly in a vertical
position using a fabricated spindle stand.
3. Install six, .50 in. diameter x .75 in. long socket
head capscrews (34, Figure 3-6) through the disc
brake back plate into the mating holes in the seal
retainer. Tighten securely.
NOTE: The capscrews installed in step 3 will secure
the seal carrier and face seal assembly to the brake
housing during brake removal.
DO NOT ROTATE WHEEL HUB.
4. Disconnect speed sensor cables. Loosen sensor
clamping capscrews and remove speed sensors
(16).
5. Remove capscrews (20) and hardened flatwash-
ers (21) securing brake adaptor (19) to brake
housing.
6. Remove cover (5) and discard O-ring seal.
7. Remove capscrews (11) and hardened flatwash-
ers (12). Remove bearing retainer (13) and shims
(8).
8. Attach a lifting device to the wheel hub/brake
assembly and carefully lift it straight up and off the
spindle. Remove outer bearing cone (7) and re-
tainer pin (40).
9. Rotate hub vertically 180° and place on blocking
to prevent damage to wheel studs and machined
surfaces.
10. Remove capscrews (14) and washers (15) secur-
ing seal carrier (37) sensor gear (35) and shims
(36) to wheel hub.
G03017 02/01
11. Remove capscrews (23) and hardened washers
(24) securing brake assembly inner gear to wheel
hub.
12. Attach lifting eyes to brake assembly, attach over-
head hoist and carefully lift off hub. Refer to Sec-
tion "J" for brake assembly rebuild instructions.
13. Remove and discard seal carrier O-ring (38)
14. If bearings require replacement, remove cups (6
& 29) from wheel hub.
15. Remove capscrews (31) and hardened flatwash-
ers (32). Remove brake adaptor and discard O-
rings (22 & 25).
16. Remove inner bearing cone (28) and retainer pin
(39).
17. Remove bearing spacer (27).

Cleaning and Inspection

1. Clean all metal parts in fresh cleaning solvent.
2. Inspect wheel hub studs (2, Figure 3-6) and
replace if damaged or broken.
NOTE: If new studs are installed, coat the hole in the
hub and serrated portion of the stud with an anti-seize
compound prior to installation. DO NOT coat threads.
3. Inspect tapped hole threads and re-tap if neces-
sary.
4. Inspect bearing seating surfaces in hub and on
spindle. Inspect bearing spacer. Use a stone to
carefully dress high spots that may interfere with
re-assembly.
5. Inspect all other machined surfaces for damage.
6. Always use new O-ring seals during assembly.
Front Wheel Hub and Spindle G3-5