JLG E300 Service Manual - Manual (Page 156)

SECTION 5 - HYDRAULICS
5-14 – JLG Lift – 3121253
5.3 PRESSURE SETTING PROCEDURE
Adjustments made at the Main Valve Bank
MAIN PRESSURE RELIEF VALVE – 3000 PSI (207
BAR)
1. Install pressure gauge at port MP of Main Valve
Bank.
2. Actuate and hold Telescope In to “end of stroke” &
take pressure reading.
3. After loosening relief valve jam nut, adjust valve
clockwise to increase setting or counter-clockwise to
reduce the setting accordingly.
4. Tighten relief valve jam nut and repeat step 2 to ver-
ify setting.
SWING RIGHT / LEFT – 750 PSI (52 BAR)
1. Install pressure gauge at port MP of Main Valve
Bank.
2. Activate Swing Right or Left and hold to the turntable
stop. Take pressure reading.
3. After loosening the relief valve jam nut, adjust valve
clockwise to increase pressure or counterclockwise
to reduce pressure accordingly.
USE CAUTION NOT TO EXCEED A RELIEF VALVE SETTING OF 750
PSI (51 BAR) AS COMPONENTS OF THE SWING CIRCUIT CAN BE
DAMAGED.
4. Tighten relief valve jam nut and repeat step 2 to ver-
ify setting.
MAIN RELIEF
VALVE
SWING RELIEF
VALVE