JLG 530LRT, Service And Maintenance Manual

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SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
4-70 3121781
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
1. Inspect the sealing surfaces of the pump for nicks or
scratches.
REASSEMBLY
1. Install new O-ring. Lubricate 0-ring with petroleum
jelly.
2. Replace pressure limiter valves. Torque to 22 ft. lb. (30
Nm).
3. 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 (5 and 6) on
the filter assembly (3).
2. Remove the mounting bolts/washers (2) on top to
remove the filter assembly from the bracket.
INSTALLATION
1. Attach filter assembly (3) to mounting bracket (1)
using the mounting bolts/washers (2).
NOTE: Torque mounting bolts to 35 ft. lb. (48 Nm).
2. Uncap and reconnect the hydraulic lines (5 and 6) to
the filter.
NOTE: If removed and reinstalled, filter bowl torque is
30 ft. lb. (40 Nm).
Pressure Limiter
14 mm
22 ft.lbs. 30 Nm ( )
L300
L022
14 mm
22 ft.lbs. (30 Nm)
L400
1. Mounting Bracket
2. Filter to Bracket
Bolts/Washers
3. Filter Assembly
4. Filter Bowl
5. Inlet Hose from Port
F (Out) - Axial Pump
6. Outlet Hose to Port E
(Return) - Axial Pump
7. Rear Wall of Engine
Compartment
Figure 4-22. Charge Pump Filter
1