JLG 510AJ Service Manual - Manual (Page 100)

SECTION 3 - CHASSIS AND TURNTABLE
3-58 – JLG Lift – 3121181
3.6 ADJUSTMENT PROCEDURE FOR LOCKOUT
VALVE
1. With the turntable centered, adjust the bracket with the
washers to push the plunger in 5/16" ± 1/16" (7.9 ± 1.6
mm).
2. The ideal adjustment is 3/8" (9.5 mm). Do not push the
plunger in more that 3/8" (9.5 mm). The extra adjust-
ment is needed for the turntable bearing play.
3.7 OSCILLATING AXLE BLEEDING PROCEDURE AND
LOCKOUT TEST
Lockout Cylinder Bleeding (Early Cylinders)
NOTE: The following procedure is to be used on machines built
prior to S/N 1300003222.
ENSURE PLATFORM IS FULLY LOWERED AND BOOM IS CEN-
TERED OVER REAR AXLE PRIOR TO BEGINNING BLEEDING
PROCEDURE.
ENSURE MACHINE IS ON A LEVEL SURFACE AND REAR
WHEELS ARE BLOCKED, BRAKE WIRE IS DISCONNECTED.
1. Make sure machine is on a level surface.
2. Center boom over rear axle to make sure the cam valve
in the rotary coupling is depressed.
3. Place chocks under the tires to ensure the machine does
not move. Disable the machine brakes by disconnecting
the brake solenoid(s) on the brake valve.
4. Use suitable containers to catch any excess hydraulic
fluid. Place the containers under each lockout cylinder.
5. Open one bleeder screw at a time.
6. Start the engine, position drive control lever forward or
reverse.
7. Close bleeder screws when all air is dissipated (bled).
8. Reconnect the brake solenoid(s) and remove the wheel
chocks.
9. Perform oscillating axle lockout test.
10. If necessary, repeat steps 1 thru 7.
1. Washer
2. Bracket
3. Lockout Valve
Figure 3-47. Valve Adjustment