120H and 135H Motor Graders Hydraulic and Steering System Blade Lift Control Valve Caterpillar


Blade Lift Control Valve
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Illustration 1g00591073

(1) Lubricate seals with a thin covering of the lubricant that is being sealed.

(2) Torque for two plugs ... 80 ± 15 N·m (60 ± 11 lb ft)

(3) 102-7412 Spring

Test length ... 28 mm (1.1 inch)
Test force ... 46.0 ± 2.4 N (10.00 ± .54 lb)
Free length after test ... 48.42 mm (1.906 inch)
Outside diameter ... 18.2 mm (.72 inch)

(4) Torque for blade lift relief valve ... 35 ± 7 N·m (26 ± 5 lb ft)

Note: Before you install the two valves (5) and the two seats (6) into the control valve body, assemble the valves and seats together.

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

(8) Torque for plug ... 70 ± 15 N·m (52 ± 11 lb ft)

(9) 6E-5153 Spring

Test length ... 14.0 mm (.55 inch)
Test force ... 18.0 ± 1.4 N (4.00 ± .32 lb)
Free length after test ... 18.4 mm (.72 inch)
Outside diameter ... 7.2 mm (.28 inch)

(10) Lubricate seals with a thin covering of the lubricant that is being sealed.

(11) 9J-0403 Spring

Quantity ... 2
Test length ... 18.7 mm (.74 inch)
Test force ... 12.9 ± 1.0 N (2.90 ± .23 lb)
Free length after test ... 25.1 mm (.99 inch)
Outside diameter ... 10.4 mm (.41 inch)

Before you assemble the six balls (14) and other components into the detent valve, insert the retainer (13) into spacer (12) .

Lubricate the six balls (14) and piston (15) with a thin covering of the lubricant that is being sealed.

(16) Torque for two bolts ... 35 ± 8 N·m (26 ± 6 lb ft)

(17) 128-8644 Spring

Test length ... 15.0 mm (.59 inch)
Test force ... 128.6 ± 12.9 N (28.91 ± 2.90 lb)
Free length after test ... 19.5 ± 0.5 mm (.78 ± .02 inch)
Outside diameter ... 27.06 mm (1.065 inch)

(18) 128-8643 Spring

Test length ... 15.0 mm (.59 inch)
Test force ... 44.2 ± 4.2 N (9.94 ± .94 lb)
Free length after test ... 20.5 ± 0.5 mm (.81 ± .02 inch)
Outside diameter ... 20.23 mm (.797 inch)

(19) Torque for detent ... 12 ± 3 N·m (106 ± 27 lb in)

(20) 111-8234 Spring

Color Code ... Light blue stripe
Test length ... 21 mm (.83 inch)
Test force ... 11.0 ± 0.6 N (2.47 ± .14 lb)
Free length after test ... 29.2 mm (1.15 inch)
Outside diameter ... 15.0 mm (.59 inch)

(21) 6E-3007 Spring

Test length ... 8.6 mm (.34 inch)
Test force ... 0.234 ± 0.024 N (.053 ± .0054 lb)
Free length after test ... 10.0 mm (.39 inch)
Outside diameter ... 4.6 mm (.18 inch)

Gently seat ball (22) into the control valve body at assembly.

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




Illustration 2g00591079

View (A)

(24) Lubricate seals with a thin covering of the lubricant that is being sealed.

(25) Lubricate rings with a thin covering of the lubricant that is being sealed.

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