JLG 4394RT Service Manual - Manual (Page 196)

SECTION 4 - HYDRAULICS
4-30 – JLG Lift – 3121249
Pressure Limiter Valve Replacement
NOTE: Replace the pressure limiter valve as a complete
unit. Do not attempt to repair individual components.
REMOVAL:
1. Using a 14 mm wrench, remove the pressure limiter
valves (L300/L400). Discard O-rings.
INSPECTION:
2. Inspect the sealing surfaces of the pump for nicks or
scratches.
REASSEMBY:
3. Install new O-ring. Lubricate 0-ring with petroleum
jelly.
4. Replace pressure limiter valves. Torque to 22 lb-ft
(30 Nm).
5. Operate pump at full range of controls to ensure
proper machine operation.
4.11 CHARGE PUMP FILTER
REMOVAL:
1. Disconnect and cap the hydraulic lines on the filter
(1).
2. Remove the four bolts (2) to remove the filter from
the bracket.
INSTALLATION:
1. Attach filter (1) to bracket using the four bolts (2).
2. Uncap and reconnect the hydraulic lines to the filter.
Pressure Limiter
14 mm
22 ft.lbs. 30 Nm
( )
L300
L022
14 mm
22 ft.lbs. (30 Nm)
L400
1 2
1. Charge Pump Filter
2. Bolt, 3/8"-16NC x 5/8"20
Figure 4-26. Charge Pump Filter