12H, 140H and 160H Motor Graders Air System and Brakes Service Brakes Caterpillar


Service Brakes
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12H, 140H and 160H Motor Graders Air System and Brakes [RENR1414]
BRAKING SYSTEM
BRAKE GP



Illustration 1g00609781

Note: All surfaces that contact the rubber toric rings and the actual rings must be cleaned and dry at assembly. Also apply a thin film of oil to the contacting surfaces of the seals.

(1) Shims

Outer diameter of all shims ... 66.55 mm (2.620 inch)
Thickness of 7D-8439 Shim ... 0.18 mm (.007 inch)
Thickness of 7D-8441 Shim ... 0.13 mm (.005 inch)
Thickness of 9D-7047 Shim ... 0.51 mm (.020 inch)

(2) Torque for 3 bolts ... 260 ± 14 N·m (192 ± 10 lb ft)

(A) Complete Brake Pack

New Thickness ... 50.14 ± 1.65 mm (1.974 ± 0.065 inch)
Maximum Wear Of The Thickness Of The Brake Pack That Is Permissible ... 4.83 mm (0.190 inch)
Thickness For Inspection ... 45.31 mm (1.784 inch)

(3) Lubricate the friction discs at assembly with the lubricant that is being used.

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

(5) Lubricate the bores with a thin covering of the lubricant that is being sealed.

(6) 7D-8434 Disc

Quantity ... 10
New Thickness ... 1.91 ± 0.05 mm (.075 ± .002 inch)

(7) 6Y-7916 Friction Disc

Quantity ... 9
New Thickness ... 3.45 ± 0.13 mm (.136 ± .005 inch)
Reusable Minimum Thickness ... 2.92 mm (.115 inch)
New Minimum Groove Depth ... 0.40 mm (.016 inch)
Reusable Minimum Groove Depth ... 0.127 mm (.0050 inch)

(8) Torque for six bolts ... 40 ± 7 N·m (30 ± 5 lb ft)

(9) 9J-5498 Spring

Quantity ... 6
Test length ... 46.02 mm (1.812 inch)
Test force ... 200 ± 10 N (45 ± 2 lb)
Free length after test ... 68.8 mm (2.71 inch)
Outside diameter ... 20.96 mm (.825 inch)

(10) Torque for ten bolts ... 240 ± 40 N·m (175 ± 29 lb ft)

(11) Torque for two bolts ... 240 ± 40 N·m (175 ± 29 lb ft)

Information System:

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