JLG E300 Service Manual - Manual (Page 161)

SECTION 5 - HYDRAULICS
3121253 – JLG Lift – 5-19
4. After loosening relief valve jam nut, adjust valve
clockwise to increase pressure or counterclockwise
to reduce pressure accordingly.
5. Tighten relief valve jam nut. Repeat step 3 and verify
the pressure setting.
Option 2:
1. Disconnect, cap, and plug the platform level down
hose and adapter either at the platform level master
cylinder, at the platform level slave cylinder, or at
port “16” of the Boom Function Valve Bank.
USE CAUTION WHEN DISCONNECTING / RECONNECTING HOSES
ON THE PLATFORM LEVEL CIRCUIT AS THIS CIRCUIT MAINTAINS
PRESSURE
2. Install pressure gauge in one of the following loca-
tions:
• at port “16” of Boom Function Valve Bank
• at end of platform level down hose which was discon-
nected in step 1 (do not use this location if port “16”
was chosen in step 1).
3. Activate Platform Level Down and hold. Take pres-
sure reading.
4. After loosening relief valve jam nut, adjust valve
clockwise to increase pressure or counterclockwise
to reduce pressure accordingly.
5. Tighten relief valve jam nut. Repeat step 3 and verify
the pressure setting.
6. Reconnect the platform level down hose that was
disconnected in step 1.
USE CAUTION WHEN DISCONNECTING / RECONNECTING HOSES
ON THE PLATFORM LEVEL CIRCUIT AS THIS CIRCUIT MAINTAINS
PRESSURE.
PLATFORM LEVEL
DOWN HOSE
MASTER CYLINDER
PLATFORM LEVEL
DOWN HOSE
SLAVE CYLINDER