938G Series II Wheel Loader and IT38G Series II Integrated Toolcarrier Hydraulic System Caterpillar


Relief Valve (Line)

Usage:

938G II B9Y

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)     C     B    
Tilt (rod end)     A     C    
Auxiliary (rod end)     A     A    
Auxiliary (head end)     A     A    
Pin Coupler (rod end)     -     A    
Pin Coupler (head end)     -     A    
( 1 ) For the part numbers and pressure setting of the line relief valves, refer to the specifications that follow.

(A) 186-0908 Relief Valve

Pressure setting at a flow of 20 L/min (5.3 US gpm) ... 22100 ± 350 kPa (3200 ± 50 psi)



Illustration 1g00921139

(1) Tighten the locking nuts to the following torque. ... 14 ± 2 N·m (124 ± 18 lb in)

(2) Tightening torque ... 45 ± 5 N·m (33 ± 4 lb ft)

(3) Torque at installation ... 45 ± 5 N·m (33 ± 4 lb ft)

(B) 186-0901 Relief Valve

Pressure setting at a flow of 20 L/min (5.3 US gpm) ... 9000 ± 350 kPa (1305 ± 50 psi)



Illustration 2g00921139

(1) Tighten the locking nuts to the following torque. ... 14 ± 2 N·m (124 ± 18 lb in)

(2) Tightening torque ... 45 ± 5 N·m (33 ± 4 lb ft)

(3) Torque at installation ... 45 ± 5 N·m (33 ± 4 lb ft)

(C) 185-7712 Relief Valve

Pressure setting at a flow of 4 L/min (1.1 US gpm) ... 25900 ± 350 kPa (3750 ± 50 psi)



Illustration 3g00921146

(4) Tighten the locking nut to the following torque. ... 24 ± 2 N·m (212 ± 18 lb in)

(5) Torque at installation ... 45 ± 5 N·m (33 ± 4 lb ft)

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