JLG 660SJ Service Manual - Manual (Page 55)

SECTION 3 - CHASSIS & TURNTABLE
3121298 – JLG Lift – 3-11
Hub-Spindle Assembly
NOTE: Spray a light film of oil on all component parts during
assembly. Spray a generous amount of oil on bearings dur-
ing installation.
1. Press Bearing Cup of part (1C), position "A", into Hub
using T-158422 pressing tool.
2. Turn hub over and press Bearing Cup of part (1C), posi-
tion "B", into hub using T-158422 pressing tool.(T).
3. Place Bearing Cone of part (1C), into Bearing Cup of part
(1C), position "B".
4. Grease Seal (1B) lip and press seal into Hub (1D) using
appropriate tool until seal is flush with end of hub.(T).
DO NOT USE EXCESSIVELY HIGH PRESSURE TO PRESS IN STUDS OR HUB MAY
CRACK.
5. Place Hub (1D) into pressing base. Press nine Studs (1H)
in Hub.
6. Set Spindle assembly (1A) on bench with flange down.
Turn Hub (1D) over and lower onto Spindle (5). Install
boot (21) if applicable.
7. Install Bearing Cone of part (1C) in Bearing Cup, position
"A".
8. Apply Loctite 243 or equivalent on Bearing Nut (1F)
thread. Screw Nut (1F) on top of Bearing Cone of part
(1C). Leave 0.003-0.005 inches end play to check initial
rolling torque with unit tied down. Torque Bearing Nut
(1F) until rolling torque is 40 - 50 in-lb (4.5 - 5.6 Nm)
greater than initial rolling torque. Using tool T-206569
for Bearing Nut.
NOTE: Final torque is initial rolling torque plus 40-50 in-lb E.g., if
initial rolling torque is 30 in-lb, final rolling torque is
between 70-80 in-lb. Be sure to rotate hub as torque is
applied to properly seat bearing. Be sure torque wrench is
tangent to the Hub (1D) OD.
9. Install two Set Screws (1G) in Bearing Nut (1F) threaded
holes. Make sure Set Screw is driven in spindle thread.
Tighten set screws to damage thread and stake edge of
nut around Set Screws (1G) so nut will not loosen.
Figure 3-12. Hub Spindle Assembly
1A
1B
1C
1H
1D
1C
1F
1G