Komatsu 830E Shop Manual page 299

4. Wrap a chain and chain binder (2, Figure 3-10)
around the top half of the tire. Secure chain
through the frame. Chain should be tightened
enough to prevent movement during bearing
adjustment procedure when the retainer plate is
removed.
5. Install another chain (3) around the bottom half
of the tire and tighten enough to prevent move-
ment during bearing adjustment procedure.
6. Drain oil at wheel hub drain plug (24, Figure 3-
5). Remove cover (3).
7. Remove capscrews (5), retainer plate (8), and
shims (7).
8. Reinstall retainer plate (with the thickness
dimension stamp facing toward the outside),
capscrews, and hardened washers. Do not
install shims.
9. Remove tire retaining chains (2 & 3, Figure 3-
10).
10. Torque retainer capscrews alternately using the
following procedure:
a. Tighten all capscrews to 60 ft. lbs. (81 N.m)
torque while rotating the hub.
b. Increase torque on all capscrews to 120 ft.
lbs. (163 N.m) while rotating hub.
c. Increase torque on all capscrews to 180 ft.
lbs. (244 N.m) while rotating hub.
d. Increase torque on all capscrews to 240 ft.
lbs. (325 N.m) while rotating hub.
e. Increase torque on all capscrews to 250 ft.
lbs. (339 N.m) while rotating hub.
FIGURE 3-10. WHEEL SUPPORT CHAIN
INSTALLATION
1. Suspension Support
Chain
G03018 04/03
2. Chain & Binder
3. Chain & Binder
Front Wheel Hub and Spindle
11. Loosen all six capscrews until the flat washers
are free, then select two capscrews 180° apart
and adjacent to the 0.50 in. (13 mm) holes in
the retainer plate. Tighten only these two cap-
screws to 55 ft. lbs. (75 N.m) torque while rotat-
ing the wheel hub. Refer to Figure 3-9.
12. Tighten the same two capscrews to 110 ft. lbs.
(149 N.m) while rotating the hub.
13. Using a depth micrometer, measure and record
the depth to the end of the spindle from the face
of the retainer plate through each of the two
holes in the retainer plate adjacent to the cap-
screws tightened in step 12.
14. Add the two depth dimensions measured in step
13 and divide the total by 2, to obtain an aver-
aged depth dimension.
Record average Depth (d
15. Subtract the dimension stamped on the face of
the retainer plate from the averaged depth
above to determine the required shim pack.
ave. Depth(d ) - plate Thickness(t
a
d - t = _______________ Shim Pack
a p
NOTE: The above procedure results in a shim pack
which will provide a nominal 0.007 in. (0.178 mm)
preload for the bearings.
16. Assemble a shim pack equal to the dimension
established in step 15 (within 0.001 in.).
NOTE: Shim pack must be compressed when
measuring.
17. Reinstall tire support chains (2 & 3, Figure 3-10).
18. Remove capscrews and retainer. Install shim
pack and reinstall retainer, capscrews, and
hardened washers.
19. Tighten all capscrews alternately to 750 ± 75 ft.
lbs. (1017 ± 102 N.m) torque in several succes-
sive increments while rotating the hub.
20. Using a new O-ring (10, Figure 3-5), install cover
(3). Install capscrews and washers (2) and
tighten to standard torque.
21. Remove tire support chains (2 & 3, Figure 3-10).
22. Rotate the wheel hub to position the fill plug (4,
Figure 3-5) at the 12 o'clock position. Remove
the fill plug and level plug (6). Fill wheel hub
assembly at fill hole with SAE 80W-90 oil. When
properly filled, oil should be present at the level
(lower) hole. Replace fill and level plugs.
):______________
a
)=Shim Pack
p
G3-9