938H Wheel Loader and IT38H Integrated Toolcarrier Hydraulic System Relief Valve (Line) Caterpillar


Relief Valve (Line)
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1.1. 264-5999 Relief Valve Group
2.1. 264-6000 Relief Valve Group
3.1. 270-0291 Relief Valve Group
4.1. 270-0351 Relief Valve Group
5.1. 270-0352 Relief Valve Group

Table 1
Machine Effectivity of the Line Relief Valves (1)    
Relief Valve     938G Series II Wheel Loaders     IT38G Series II Integrated Toolcarriers    
Tilt (head end)     270-0291     270-0351    
Tilt (rod end)     264-5999     270-0352    
Auxiliary (rod end)     264-6000     264-6000    
Auxiliary (head end)     264-6000     264-6000    
( 1 ) For the part numbers and pressure setting of the line relief valves, refer to the specifications that follow.

264-5999 Relief Valve Group




Illustration 1g01393712

Pressure setting at a flow of 19 L/min (5 US gpm) ... 31000 ± 350 kPa (4500 ± 51 psi)

(1) Torque at installation ... 65 ± 7 N·m (48 ± 5 lb ft)

(2) Tightening torque ... 95 ± 10 N·m (70 ± 7 lb ft)

(3) Tightening torque ... 61 ± 6 N·m (45 ± 4 lb ft)

264-6000 Relief Valve Group




Illustration 2g01393764

Pressure setting at a flow of 19 L/min (5 US gpm) ... 22100 ± 350 kPa (3205 ± 51 psi)

(13) Torque at installation ... 95 ± 10 N·m (70 ± 7 lb ft)

(14) Tightening torque ... 95 ± 10 N·m (70 ± 7 lb ft)

(15) Tightening torque ... 61 ± 6 N·m (45 ± 4 lb ft)

270-0291 Relief Valve Group




Illustration 3g01393725

Pressure setting at a flow of 19 L/min (5 US gpm) ... 31000 ± 350 kPa (4500 ± 51 psi)

(1) Torque at installation ... 95 ± 10 N·m (70 ± 7 lb ft)

(2) Tightening torque ... 95 ± 10 N·m (70 ± 7 lb ft)

(3) Tightening torque ... 61 ± 6 N·m (45 ± 4 lb ft)

270-0351 Relief Valve Group




Illustration 4g01393721

Pressure setting at a flow of 19 L/min (5 US gpm) ... 9000 ± 350 kPa (1305 ± 50 psi)

(4) Torque at installation ... 65 ± 7 N·m (48 ± 5 lb ft)

(5) Tightening torque ... 95 ± 10 N·m (70 ± 7 lb ft)

(6) Tightening torque ... 61 ± 6 N·m (45 ± 4 lb ft)

270-0352 Relief Valve Group




Illustration 5g01393756

Pressure setting at a flow of 19 L/min (5 US gpm) ... 28000 ± 350 kPa (4060 ± 51 psi)

(10) Torque at installation ... 65 ± 7 N·m (48 ± 5 lb ft)

(11) Tightening torque ... 95 ± 10 N·m (70 ± 7 lb ft)

(12) Tightening torque ... 61 ± 6 N·m (45 ± 4 lb ft)

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