120H and 135H Motor Graders Hydraulic and Steering System Control Valve (Snow Plow/Dozer Lift) Caterpillar


Control Valve (Snow Plow/Dozer Lift)
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Illustration 1g01389369

A cross section of the control valve with backup ring (8)




Illustration 2g01958528

A cross section of the control valve without backup ring (8)

(1) Torque for two check valve groups ... 80 ± 4 N·m (60 ± 3 lb ft)

(2) Lightly lubricate the O-ring seals with the lubricant that is being sealed.

(3) 6E-5153 Spring

Length under test force ... 14.00 mm (0.551 inch)
Test force ... 18.00 ± 1.44 N (4.0 ± 0.3 lb)
Free length after test ... 18.38 mm (0.724 inch)
Outside diameter ... 7.2 mm (0.28 inch)

(4) Torque for pipe plug ... 35 ± 7 N·m (26 ± 5 lb ft)

(5) Torque for plug assembly ... 70 ± 15 N·m (50 ± 11 lb ft)

(6) Torque for relief valve group ... 35 ± 3 N·m (26 ± 2 lb ft)

(7) Lightly lubricate the O-ring seals with the lubricant that is being sealed.

(8) Lightly lubricate the backup rings with the lubricant that is being sealed.

Before you assemble six balls (10) and other components into the detent valve, insert retainer (11) into spacer (12) .

Lightly lubricate the piston (9) and six balls (10) with the lubricant that is being sealed.

(13) 128-8643 Spring

Length under test force ... 15.00 mm (0.591 inch)
Test force ... 44.20 ± 4.20 N (9.9 ± 0.9 lb)
Free length after test ... 20.50 ± 0.50 mm (0.807 ± 0.020 inch)
Outside diameter ... 20.23 mm (0.796 inch)

(14) 128-8644 Spring

Length under test force ... 15.00 mm (0.591 inch)
Test force ... 128.60 ± 12.90 N (29.0 ± 2.9 lb)
Free length after test ... 19.50 ± 0.50 mm (0.768 ± 0.020 inch)
Outside diameter ... 27.06 mm (1.065 inch)

(15) 111-8234 Spring

Color code ... Light blue stripe
Length under test force ... 21.00 mm (0.827 inch)
Test force ... 11.00 ± 0.60 N (2.5 ± 0.1 lb)
Free length after test ... 29.234 mm (1.1509 inch)
Outside diameter ... 15.00 mm (0.591 inch)

(16) 6E-3007 Spring

Length under test force ... 8.60 mm (0.339 inch)
Test force ... 0.234 ± 0.024 N (0.1 ± 0.0 lb)
Free length after test ... 10.00 mm (0.394 inch)
Outside diameter ... 4.6 mm (0.18 inch)

(17) Seat the ball gently into the valve body at assembly.

(18) 102-7412 Spring

Length under test force ... 28.00 mm (1.102 inch)
Test force ... 46.00 ± 2.40 N (10.3 ± 0.5 lb)
Free length after test ... 48.417 mm (1.9062 inch)
Outside diameter ... 18.20 mm (0.717 inch)

(19) Torque for lever ... 25 ± 6 N·m (18 ± 4 lb ft)

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