Lull 944E-42, Service Manual

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General Information, Specifications and Maintenance
2.20 Model 644E-42/944E-42 Rev. 6/04
2.5.11 Hydraulic System
Hydraulic System: 644E-42 and 944E-42
System Capacity 50.2 gal (190 liters)
Reservoir Capacity 33.5 gal (127 liters)
Type of Oil ISO Grade 46 Anti-Wear Hydraulic Oil
Refer to Section 2.6.4, “Hydraulic System.”
Description 644E-42 and 944E-42
Valve Relief Settings:
Port Relief Attachment Tilt (Both Sides) 4,000 ±100 psi (275,8 ±6,9 bar)
Port Relief - Aux 3,000 ±100 psi (206,8 ±6,9 bar)
Transfer Carriage Cylinder Base Port Relief 2,500 ±100 psi (172,4 ±7 bar)
Transfer Carriage Cylinder Base Port Relief 3,750 ±100 psi (258,6 ±6,9 bar)
Extend Base Port Relief 3,000 ±100 psi (206,8 ±6,9 bar)
Pressure Reducing Relieving Valve - Stabilizer 75-150 psi (5,2-10,3 bar)
Pressure Reducing Valve - Park Brakes 550 ±50 psi (37,9 ±3,4 bar)
Pressure, Steering Relief 2,500 ±100 psi (172,4 ±7 bar)
Main Pump Standby Pressure @ Valve Inlet 200-250 psi (13,8-17,2 bar)
Main Relief Pressure @ Main Valve Inlet 3,500 ±100 psi (241,3 ±6,9 bar)
Accumulator Charge Valve Low Setting 1050 ±50 psi (72,4 ±3,4 bar)
High Setting 1950 ±50 psi (134,4 ±3,4 bar)