SECTION 4 - HYDRAULICS
3121642 – JLG Lift – 4-31
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.
4.12 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. Charge Pump Filter
2. Bolt, 3/8"-16NC x 5/8"20
Figure 4-26. Charge Pump Filter
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