Komatsu 830E-AC Shop Manual page 488

7. If removed, install disc (1, Figure 3-6) on the
wheel hub using cap screws and flat washers
(2). Lubricate the underside of cap screw (2)
heads and threads with multi-purpose grease
Number 2 with 5% Molybdenum Disulphide.
Tighten cap screws to 2007 N·m (1,480 ft lbs)
torque.
NOTE: The mating surfaces between the spindle and
the brake disc must be clean and dry, and with no
excess cap screw lubricant on these surfaces.
8. Using eight cap screws, washers and spacers,
install the wheel speed gear to the wheel hub.
Tighten cap screws same as in Step 7.
9. Install bearing cups (11 & 20 Figure 3-5) in the
wheel hub (1) as follows:
a. Preshrink cups by packing them in dry ice, or
by placing then in a deep-freeze unit.
NOTE: Do not cool below -54° C (-65° F).
b. Install cups in wheel hub bores.
c. After cups have warmed to ambient temper-
ature, press the cups tight against hub shoul-
der as follows:
1.) Inner Cup (20) - Apply 133,450 N
(30,000 lbs) force.
2.) Outer Cup (10) - Apply 102,300 N
(23,000 lbs) force.
10. Install the other half of the seal assembly (16) in
the hub using installation tool (TY2150) and soft
tipped mallet. Follow procedure outlined in step
6.
11. Check bearing cone (9) for free fit on the spindle
(17), then remove.
12. Referring to Figure 3-8, lift the hub and carefully
lower it down over the spindle. To aid installa-
tion and to prevent damaging the seal, the spin-
dle and hub should be level.
NOTE: All parts must be in place before wheel hub
(1) is installed.
G3-10
13. Install outboard pin (25, Figure 3-5) into slot on
spindle (17) and install inner bearing cone (9)
on spindle over pin (25).
14. Refer to Wheel Bearing Adjustment for final
assembly.
15. After the wheel bearings are adjusted, install
wheel speed sensor bracket. Install wheel
speed sensor in bracket.
16. Position wheel speed sensor to 0.5 - 1.5 mm
(0.02 - 0.06 in.) gap between sensor tip and
gear. Connect wire harness to sensor.
FIGURE 3-8. WHEEL HUB INSTALLATION
1. Support Chains
2. Wheel Hub
Front Wheel Hub and Spindle
3. Fabricated Support
Stand
G03029