Doosan DX60R Shop Manual page 627

Preload Adjustment of Ball Bearing
NOTE:
In order to ensure the proper life for the ball
bearing (21), it is necessary to provide a certain
preload. Therefore, if replacing a part that
influences the amount of preload, temporarily
assemble in accordance with the following
procedure, and check the amount of preload. If
You assemble without checking, it could cause
the GM motor to operate poorly or break down
prematurely.
• Parts which influence amount of preload of the ball
bearing: Hub (1), spindle kit, ball bearing (21).
• If not replacing the parts listed above, skip this
process and proceed to process No. 3 of "Mount RV
Gear Assembly" on page 1-54.
• Preload check and preload adjustment instructions
are as follows.
1. Ball bearing (21) preload adjustment procedure.
A. Mount the main bearing preload adjustment jig on
the spindle (2), tighten the special nut, and apply
preload to the ball bearing (21). Special nut
tightening torque: 5 kgf•m (49 Nm) (36 ft lb)
NOTE: The hold flange and spindle have been
machined as a pair and are therefore configured
as an assembly. The hold flange alone therefore
cannot be replaced. At this time, the spindle
must be replaced together with it. This
assembly is referred to as the "spindle
assembly". If replacing by spindle assembly,
perform disassembly and assembly again.
2. Remove the main bearing preload adjustment jig from the
spindle (2).
3. After completing
adjustments of items I, II and III, proceed to the process
No. 3 of "Mount RV Gear Assembly" on page 1-54.
Travel Motor
hold flange adjustment
Figure 148
by the
SP001686
Page 69