JLG 3969electric Service Manual - Manual (Page 24)

SECTION 2 - PROCEDURES
2-12 – JLG Sizzor– 3120881
2.16 PRESSURE SETTING PROCEDURES
Main Relief at Pump
1. Install pressure gauge at port “G” on the control
valve.
2. Activate and bottom out Lift Up. Adjust Main Relief to
186 bar (2700 psi).
Lift UP Relief
1. With pressure gauge at “G” port on the control
valve, activate and bottom out Lift Up.
2. Adjust Lift Relief to 172 bar (2500 psi) on the 3369ES
and 186 bar (2700 psi) on the 3969ES.
Lift Down Relief
1. With pressure gauge at “G” port on the control
valve, activate and bottom out Lift Down.
2. Adjust Lift Relief to 62 bar (900 psi).
Steer Relief
1. With pressure gauge at “G” port on the control
valve, activate and bottom out steer left or right.
2. Adjust Steer Relief to 82.7 bar (1200 psi).
3. Shut down hydraulic system and remove pressure
gauge
2.17 DRIVE TORQUE HUB
Disassembly
1. Loosen all cover bolts (28 & 29) and drain oil from
unit.
2. Remove the cover bolts (28 & 29) and lift off input
cover. Remove and discard o-ring from counterbore
of input cover.
3. Remove sun gear and thrust washer.
4. Lift out the carrier and thrust washer.
5. Remove input spacer.
6. Lift out internal gear and thrust washer.
7. While wearing eye protection, remove the retaining
ring from the output shaft and discard.
8. Remove thrust washer from the output shaft.
9. The output shaft may now be pressed out of the
housing..
Figure 2-13. Pressure Setting Procedures