JLG 660SJ Service Manual - Manual (Page 89)

SECTION 3 - CHASSIS & TURNTABLE
3120840 – JLG Lift – 3-39
3.8 OSCILLATING AXLE BLEEDING
PROCEDURE AND LOCKOUT TEST
Lockout Cylinder Bleeding
ENSURE PLATFORM IS FULLY LOWERED AND BOOM IS CEN-
TERED OVER REAR AXLE PRIOR TO BEGINNING BLEEDING
PROCEDURE.
E NS UR E M A CH I NE IS O N A L E V E L S U R FA C E A N D REA R
WHEELS ARE BLOCKED, BRAKE WIRE IS DISCONNECTED.
1. Making sure machine is on a level surface and rear
wheels are blocked, brake wire is disconnected.
2. Center boom over rear axle making sure that cam
valve is depressed.
3. Using a Phillips screwdriver, remove screw from
connection on the brake valve and remove connec-
tor as shown.
4. Use suitable containers to retain any residual
hydraulic fluid, place containers under each lockout
cylinder.
5. Open all four bleeder screws (two on each lockout
cylinder).
6. Start the engine, position drive control lever on the
main hydraulic pump forward or reverse as shown.
7. Close bleeder screws when all air is dissipated
(bled).
8. Perform oscillating axle lockout test.
9. If necessary, repeat steps 1 thru 8.
Figure 3-21. Oscillating Valve Adjustment
Figure 3-22. Brake Valve Wiring Connection
Figure 3-23. Drive Manual Control Valve