JLG 25RTS, Service & Maintenance

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SECTION 2 - PROCEDURES
3120826 – JLG Sizzor – 2-21
2.20 PRESSURE SETTING PROCEDURES -
(4 W/S)
Racine Three Stack Valve (If Equipped)
1. Install pressure gauge at quick connect on Racine
Two Stack Valve.
2. Adjust both Steer Section Crossover Relief’s all the
way in.
3. Adjust Main Relief Cartridge out several turns.
4. Activate engine and allow hydraulic system to come
up to operating temperature.
5. Bottom out Steer function. Adjust Main Relief to 172
bar (2500 psi).
6. Bottom out Front Steer Right and Steer Left func-
tions and adjust each Steer Crossover Relief to 103
bar (1500 psi).
7. Bottom out Rear Steer Right and Steer Left functions
and adjust each Steer Crossover Relief to 103 bar
(1500 psi).
8. Bottom out Lift Overload functions and adjust Lift
Up Relief Pressure as follows:
25RTS - 90 bar (1300 psi)
33RTS - 106 bar (1550 psi)
40RTS - 138 bar (2000 psi)
9. De-energize Lift function, shut down motor, and dis-
connect pressure gauge.
Lift Down Speed Adjustment
1. Activate engine and allow hydraulic system to come
up to operating temperature.
2. Adjust color flow valve lift down speed at 25-30 sec-
onds.
Leveling Jacks Valve (If Equipped)
1. Activate engine and allow hydraulic system to come
up to operating temperature.
2. Install pressure gauge at quick connect on Racine
Two Stack Valve.
3. Energize and bottom out any jack function. Adjust
relief cartridge as follows:
25RTS - 90 bar (1300 psi)
33RTS - 106 bar (1550 psi)
40RTS - 138 bar (2000 psi)
4. De-energize jack function and shut down engine.
Remove pressure gauge.
2.21 OSCILLATING AXLE LOCKOUT
CYLINDER BLEEDING PROCEDURE
NOTE: Ensure platform is fully lowered to open the cam
valve prior to beginning oscillating axle lockout cylin-
der bleeding procedure.
1. Making sure that machine is on a level surface and
rear wheels are blocked, disengage drive hubs.
NOTE: All drive hubs must be unlocked on machines
equipped with 4WD.
.
Figure 2-22. Oscillating Axle Cam Valve
Figure 2-23. Drive Hub Disconnect