2003/03/31 Correction to Specifications , "Steering Control Valve" {4307} Caterpillar

Wheel Tractor-Scraper:

631G (S/N: CLR1-UP)

637G (S/N: CEH1-UP)

Specifications, RENR5713, "631G and 637G Wheel Tractor-Scraper Steering System", "Steering Control Valve". This module is part of Service Manual, RENR5700 and Service Manual, RENR5710.

Disregard the information for the steering control valve. Refer to the following information.

Steering Control Valve

Illustration 1	g00977641

(1) Torque for two screws ... 12 ± 2 N·m (9 ± 2 lb ft)

(2) Spring

Color code ... green stripe

Test length ... 40.4 mm (1.59 inch)

Test force ... 64 N (14.5 lb)

Free length after test ... 47.8 mm (1.88 inch)

Outside diameter ... 15.88 mm (0.625 inch)

(3) Shim

Thickness ... 0.12 mm (0.005 inch)

Pressure change for one shim ... 6 kPa (1 psi)

(4) Shim

Thickness ... 1.20 mm (0.048 inch)

Pressure change for one shim ... 55 kPa (8 psi)

Note: As required, use shim (3) and shim (4) in order to set the pressure for the pressure reducing valve.

(5) Spring

Color code ... yellow stripe

Test length ... 34.04 mm (1.34 inch)

Test force ... 45 ± 6 N (10 ± 1 lb)

Free length after test ... 42.2 mm (1.66 inch)

Outside diameter ... 11.91 mm (0.469 inch)

(6) Apply 154-9731 Thread Lock Compound to the plug.

(7) Spacers

Thickness of one spacer ... 0.25 mm (0.010 inch)

Thickness of one spacer ... 0.90 mm (0.035 inch)

Note: As required, use spacers (7) to set the flow control valve.

(8) Spring (exterior)

Test length ... 61.0 mm (2.40 inch)

Test force ... 161 ± 24 N (36.2 ± 5.5 lb)

Free length after test ... 69.9 mm (2.75 inch)

Outside diameter ... 30.5 mm (1.20 inch)

(9) Spring (interior)

Test length ... 38.8 mm (1.53 inch)

Test force ... 98 ± 5 N (22.0 ± 1.1 lb)

Free length after test ... 59.5 mm (2.34 inch)

Outside diameter ... 20.62 mm (0.812 inch)

(10) Spring

Color code ... brown stripe

Test length ... 34.1 mm (1.34 inch)

Test force ... 242 ± 20 N (54.4 ± 4.4 lb)

Free length after test ... 42.9 ± 1.6 mm (1.69 ± 0.06 inch)

Outside diameter ... 11.91 mm (0.469 inch)

(11) Torque for nut ... 50 ± 7 N·m (37 ± 5 lb ft)

(12) Pressure change for one turn of the retainer ... 8941 kPa (1297 psi)

(13) Shims

Thickness of one shim ... 0.25 mm (0.010 inch)

Thickness of one shim ... 0.12 mm (0.005 inch)

Note: As required, use shims (13) to balance the cylinder pressure.

(14) Spring

Test length ... 55.09 mm (2.169 inch)

Test force ... 238 ± 18 N (54 ± 4 lb)

Free length after test ... 69.85 mm (2.750 inch)

Outside diameter ... 52.99 mm (2.086 inch)