JLG M4069 Service Manual - Manual (Page 68)

SECTION 3 - CHASSIS & SCISSOR ARMS
3-40 – JLG Lift – 3121824
Hub-Spindle Sub-Assembly
NOTE: Apply a light coat of oil on all component parts dur-
ing assembly.
1. Place the Hub (6) into a pressing base. Press 9
Studs (8) into the Hub.
NOTE: Use enough pressure to press in studs. Don’t use
excessively high pressure to press in Studs as this
may crack Hub.
Spray a generous amount of oil on bearings during
installation.
2. Press Bearing Cup (5), position "A" into Hub using
appropriate pressing tool.
3. Turn Hub over and press Bearing Cup, position "B"
into Hub using appropriate pressing tool.
4. Place Bearing Cone (9) into Bearing Cup, position
"B".
5. Grease Seal (refer to Figure 3-17.) lip and press Seal
into Hub using appropriate tool until seal is flush
with end of Hub.
6. Press Seal Boot (7) onto Hub, if required. Turn Hub
over and lower onto Spindle (1).
7. Install Bearing Cone (4) into Bearing Cup, position
"A".
8. Place Bearing Spacer (3) on top of Bearing Cone.
9. Using appropriate tool, install Retaining Ring (2) into
Spindle groove. Make sure ring is completely seated
in groove.
NOTE: Extra bearing pre-load caused by using tool in Step
#9 must be removed. This should be done by placing
a tool (NOT THE SAME TOOL USED IN STEP #9)
on the end of the Spindle, and then striking the tool
with a piece of bar stock. This should be adequate to
remove any additional bearing pre-load.
1. Spindle
2. Retaining Ring
3. Spacer
4. Bearing Cone
5. Bearing Cup
6. Hub
7. Boot Seal
8. Studs
9. Bearing Cone
Figure 3-24. Hub-Spindle Sub-Assembly