994 Wheel Loader Steering System Caterpillar


Steering Pump Pressure and Flow Compensator Valve

Usage:

994 9YF



Illustration 1g00101346



Illustration 2g00101348

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Maximum system pressure (cutout pressure) with the pump at rated speed ... 31000 kPa (4500 psi)

Margin pressure ... 2100 ± 105 kPa (305 ± 15 psi)

(1) Torque for the five bolts ... 21 ± 5 N·m (15 ± 4 lb ft)

(2) Torque for the two valve groups ... 60 ± 10 N·m (45 ± 7 lb ft)

(3) Turning adjustment screw clockwise increases the system pressure. Turning adjustment screw counterclockwise decreases the system pressure.

One turn of adjustment screw (3) will change system pressure approximately. ... 7405 kPa (1075 psi)

(4) Torque for the two locknuts ... 22 ± 5 N·m (16 ± 4 lb ft)

(5) 6E-3854 Spring (Outer spring for the flow compensator valve) :

Free length after test ... 19.4 mm (.76 inch)
Outside diameter ... 14.6 mm (.57 inch)

(6) 6E-3855 Spring (Inner spring for the flow compensator valve) :

Free length after test ... 17.1 mm (.67 inch)
Outside diameter ... 8.6 mm (.34 inch)

(7) 6E-3858 Spring (For the pressure compensator valve) :

Free length after test ... 20.71 mm (.815 inch)
Outside diameter ... 14.05 mm (.553 inch)

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