Free Wheeling Option; Engage Drive Motors & Brakes (Normal Operation); Gear Hub Oil Service; Check Oil Level - JLG 1850SJ Service And Maintenance Manual

3.9 FREE WHEELING OPTION

Disengage Drive Motors & Brakes for Towing, etc.
(Free Wheel)
1. Chock wheels.
2. Removing screws and invert cover so center tip presses
on disengagement pin in hub. Reinstall screws.
3. Remove chocks.
Engage Drive Motors & Brakes (Normal Operation)
1. Chock wheels.
2. Removing screws and invert cover so center tip faces
out. Reinstall screws.
3. Remove chocks.
DRIVE
HUB
DRIVE
HUB
Figure 3-12. Disengaging Drive Hubs
3121619
DISENGAGEMENT
COVER
Drive Hub Engaged
DISENGAGEMENT
COVER (REVERSED)
Drive Hub Disengaged
SECTION 3 - CHASSIS & TURNTABLE

3.10 GEAR HUB OIL SERVICE

Check Oil Level

1. Position hub as shown in Figure 3-13.
2. Remove Level Plug (3) and check oil is level with plug
opening. Add oil as needed.
3. Reinstall plug.

Change Gear Hub Oil

NOTE: Change oil when reduction gear is hot.
1. Position hub as shown in Figure 3-13.
2. Place suitable tray underneath to collect waste oil.
3. Remove three plugs.
4. Flush gear hub with appropriate solvent.
5. Reinstall Drain Plug (2).
6. Fill with oil until level reaches level hole.
7. Reinstall Level Plug (3) and Fill Plug (1).l
3
Figure 3-13. Gear Hub Oil Fill and Drain
1
2
3-21