621G, 623G and 627G Wheel Tractor-Scrapers Air System and Brakes Caterpillar


Brake Actuator

Usage:

621G CEP



Illustration 1g00926980

Maximum working pressure ... 862 kPa (125 psi)

Maximum release pressure ... 635 kPa (92 psi)

Minimum holdoff pressure ... 600 kPa (87 psi)

Maximum stroke ... 76.2 ± 3.0 mm (3.00 ± 0.12 inch)

(1) Torque for mounting nuts ... 135 ± 33 N·m (100 ± 24 lb ft)

(2) Outer spring

Free length ... 247.6 mm (9.75 inch)
Outside diameter ... 136.7 mm (5.38 inch)

(3) Inner Spring

Free length ... 190.5 mm (7.50 inch)
Outside diameter ... 65.0 mm (2.56 inch)

(4) Torque for eight bolts ... 17 ± 3 N·m (13 ± 3 lb ft)

(A) Distance between base and center of yoke assembly ... 187.5 ± 3.1 mm (7.38 ± 0.12 inch)

Caterpillar Information System:

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