Minor Repair Only; Bearing Retainer Removal; Bearing Retainer Installation; Piston Rod Removal - Komatsu 930E-2 Shop Manual

MINOR REPAIR ONLY (LOWER BEARING &
SEALS)

Bearing Retainer Removal

If only rod wiper, rod seals, bearing, O-ring and backup
rings are to be replaced, refer to steps below for lower
bearing retainer removal.
1. Remove lower bearing retainer capscrews and
hardened washers (20 & 21, Figure 2-6). Install
pusher bolts into tapped holes in retainer flange.
2. Tighten pusher bolts evenly and prepare to sup-
port bearing retainer as it exits the suspension
housing. Remove retainer assembly (18).
3. Remove wiper (29), rod seal (28), step seal (27),
O-ring (22), backup ring (23) and lower bearing
insert (24).

Bearing Retainer Installation

1. Install new rod seal (28), step seal (27) and rod
wiper (29).
When installing backup rings with rod seal (28)
and step seal (27), be certain radius is positioned
toward the seal and the white dot is positioned
away from the seal as shown in Figure 2-8.
2. Install new O-rings (22) and backup rings (23) in
their appropriate grooves in the lower bearing
retainer (18). Install new bearing (24).
NOTE: Backup rings must be positioned toward the
flange of bearing retainer as shown in Figure 2-9.
3. Install temporary, guide bolts to ensure bolt hole
alignment as bearing retainer is seated. Lift lower
bearing retainer (18) assembly into place and
carefully start into suspension housing.
4. Install capscrews and hardened washers (20 &
21). Tighten capscrews to 500 ft. lbs. (678 N.m)
torque.
5. Install wheel, tire and spindle assembly. Refer to
steps in Section "G", "Wheel, Tire and Spindle
Installation" for installation instructions.
H02013 2/01
FIGURE 2-7. PISTON ROD REMOVAL
1. Capscrew
2. Hardened Flatwasher
3. Capscrew
4. Hardened Flatwasher
5. Upper Bearing
Retainer
6. Housing
7. Piston
8. Mounting Holes
Front Suspensions
9. Steel Ball (2 ea.)
10. Roll Pin
11. Nut
12. Piston Stop
13. Key
14. Upper Bearing
15. O-Ring & Backup Ring
16. Cap Structure
H2-5