ARTICULATED DUMP TRUCK HYDRAULIC SYSTEMS Caterpillar


Steering Control Valve (5U282)

Usage:

(1) Cylinder flow balance shims:

5J4776 Shim thickness ... 0.13 mm (0.005 in.)

Two 5J4776 Shims will change the steering time at high idle by approximately ... 0.05 second

4J8224 Shin thickness ... 0.25 mm (0.010 in.)

Two 4J8224 Shims will change the steering time at high idle by approximately ... 0.1 second

NOTE: The addition of shims will cause a faster right turn (stop to stop) and a slower left turn. The result is opposite when shims are removed.

(2) 9J5714 Spring for valve spool:

Length under test force ... 40.6 mm (1.60 in.)

Test force ... 56.2 ± 6.0 N (12.6 ± 1.4 lb.)

Free length after test ... 55.4 mm (2.18 in.)

Outside diameter ... 36.6 mm (1.44 in.)

(3) 9H2367 Spring for check valve:

Length under test force ... 23.9 mm (0.94 in.)

Test force ... 1.47 ± 0.13 N (0.33 ± 0.03 lb.)

Free length after test ... 29.5 mm (1.16 in.)

Outside diameter ... 8.6 mm (0.34 in.)

(4) Shims for flow control valve:

4J6806 Shim thickness ... 1.22 mm (0.048 in.)

One shim will change the steering time (stop to stop) at high idle by approximately ... 0.1 second

Steering Time (Stop to Stop)

With engine operating at high idle.

With oil cold ... 4 - 5 seconds

With oil hot ... 3 - 4 seconds

(5) 2J6088 Spring (outer) for flow control valve:

Length under test force ... 38.9 mm (1.53 in.)

Test force ... 98.3 ± 4.9 N (22.1 ± 1.1 lb.)

Free length after test ... 59.44 mm (2.34 in.)

Outside diameter ... 20.62 mm (0.812 in.)

(6) 4J7490 Spring (inner) for flow control valve:

Length under test force ... 41.4 mm (1.63 in.)

Test force ... 59.2 ± 3.1 N (13.3 ± 0.7 lb.)

Free length after test ... 50.8 mm (2.00 in.)

Outside diameter ... 15.24 mm (0.6 in.)

(7) 2J6089 Spring for pilot valve:

Length under test force ... 36.6 mm (1.43 in.)

Test force ... 300.7 ± 30.2 N (67.6 ± 6.8 lb.)

Free length after test ... 44.2 mm (1.74 in.)

Outside diameter ... 12.50 mm (0.492 in.)

(8) Pressure relief setting for steering system ... 17,000 ± 345 kPa (2500 ± 50 psi)

Shim for pilot valve spring:

3U8811 Shim thickness ... 0.25 mm (0.010 in.)

One 3U8811 Shim will change the relief pressure by approximately ... 280 kPa (40 psi)

NOTE: 3U8811 Shim can be made from 3H2549 Shim.

Caterpillar Information System:

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