143H and 163H Motor Graders Hydraulic and Steering System Pump Control Valve (Pressure and Flow Compensator) Caterpillar


Pump Control Valve (Pressure and Flow Compensator)
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143H and 163H Motor Graders Hydraulic and Steering System [SENR8514]
HYDRAULIC SYSTEM
PUMP GP
143H and 163H Motor Graders Hydraulic and Steering System Pump Control Valve (Pressure and Flow Compensator)
12H, 140H, 143H, 160H and 163H Motor Graders Hydraulic and Steering System Piston Pump (Hydraulic and Steering)



Illustration 1g01391017

The load sensing margin pressure is set at the following pressure. ... 2100 ± 150 kPa (305 ± 22 psi)

The pressure compensation is set at the following pressure. ... 25500 ± 500 kPa (3700 ± 72 psi)

Note: When you tighten sealing locknuts (2), hold adjustment screws (1) .

(2) Torque for two sealing locknuts ... 17 ± 3 N·m (150 ± 27 lb in)

(3) Torque for margin plug ... 79 ± 4 N·m (60 ± 3 lb ft)

(4) 9T-7750 Spring

Length under test force ... 43.8 mm (1.72 inch)
Test force ... 52.0 ± 11.0 N (12.0 ± 2.5 lb)
Free length after test ... 45 mm (1.8 inch)
Outside diameter ... 15.42 mm (0.607 inch)

(5) Torque for O-ring plug ... 30.5 ± 1.5 N·m (270.0 ± 13.0 lb in)

(6) Torque for two plugs ... 30.5 ± 1.5 N·m (270.0 ± 13.0 lb in)

(7) Torque for compensator plug ... 101.5 ± 4.5 N·m (75.0 ± 3.0 lb ft)

(8) 6E-4228 Spring

Length under test force ... 44.7 mm (1.76 inch)
Test force ... 871.27 ± 1.00 N (195.0 ± 0.2 lb)
Free length after test ... 57.15 mm (2.250 inch)
Outside diameter ... 24.5 mm (0.96 inch)



Illustration 2g01391045

Section A-A

(9) Torque for needle valve ... 6.7 ± 0.7 N·m (60.0 ± 6.0 lb in)

Information System:

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