120K and 120K Series 2 Motor Graders Air System and Brakes Caterpillar


Service Brake Control

Usage:

120K JAP



Illustration 1g01703554

View of the brake system

(1) Apply white Loctite Low Breakloose PST to threads prior to assembly.




Illustration 2g01957880

Partial view of the right hand side of the machine

(2) Assemble in order to make dimension (B) . ... 530 ± 2 mm (20.9 ± 0.1 inch)

(3) Spring

Assembled length ... 96.0 mm (3.78 inch)
Load at assembled length ... 26.6 ± 2.6 N (5.98 ± 0.58 lb)
Free length after test ... 84.0 mm (3.31 inch)
Outside diameter ... 16.8 mm (0.66 inch)

(4) Tighten the nuts until the rubber clamps contact each other.




Illustration 3g01957864

View of the brake pedal and the subframe

(D) Clearance from the subframe to the lower front edge of the pedal ... 95.0 ± 6.0 mm (3.74 ± 0.24 inch)

(E) The free travel of the pedal prior to the activation of the brake switch ... 18 ± 2 mm (0.71 ± 0.08 inch)

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