armado y desarmado booster de frenos

Disassembly and Assembly 776B TRACTOR & 777B TRUCK VEHICLE SYSTEMS

Retarder And Service Brake Master Cylinder And Rotochamber SMCS - 4277-015; 4277-016

Disassemble Retarder And Service Brake Master Cylinder And Rotochamber

START BY:

a. remove retarder and service brake master cylinder and rotochamber

1. Remove four bolts (1) and the lockwashers from head assembly (2) and the bracket.

Shutdown SIS

Previous Screen

Product: TRUCK Model: 777B TRUCK 4YC Configuration: 776B TRACTOR & 777B TRUCK 4YC00001-UP (MACHINE) POWERED BY 3508 ENGINE

Media Number -SENR3153-00 Publication Date -01/03/1986 Date Updated -26/10/2004

SENR31530032

Página 1 de 10776B TRACTOR & 777B TRUCK 4YC00001-UP (MACHINE) POWERED BY 3...

12/05/2010https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis...

2. Remove the head assembly, and remove seals (3). Inspect the seals, and make a replacement as needed.

3. Pull tube assembly (4), and remove it from the power piston.

4. Apply air pressure at the inlet port to extend the rod and power piston (5) as shown.

5. With the rod extended, remove power piston retainer ring (6) and power piston (5). Remove the flange and gasket. Inspect the gasket, and make a replacement if it is torn or damaged.

NOTE: Carefully release the air pressure before disconnecting the air supply after the power piston has been removed.

6. Remove seal ring and expander ring (7) and ring (8) from each end of the piston. Remove lip-type seal (9) from the piston. Inspect the seals and rings, and make a replacement as needed.



7. Remove two nuts (12) and lockwashers, and remove bracket (10) and the gasket. Make a replacement of the gasket if it is torn or damaged.

8. Remove two locknuts (11) and the washers.

9. Install tooling (A) as shown.

10. Carefully remove bolts (13) and the lockwashers.

11. Use tooling (A) to slowly release tension on the brake spring.

12. Remove tooling (A). Remove cover (14) and brake spring (15).

13. Remove nuts (16) and the washers.



14. Pull the diaphragm unit out of body (17).

15. Remove nuts (18) and the washers.

16. Remove rod (19), guide (20), diaphragm (21), clamp (22) and clamp (23).



Assemble Retarder And Service Brake Master Cylinder And Rotochamber



1. Put clamp (4) into position in clamp (5).

2. Install guide (2) in diaphragm (3).

3. Put the diaphragm and guide in position on the studs of clamp (4).

4. Put rod (1) into position in guide (2), and install the washers and nuts on the studs.

5. Put the outer lip of diaphragm (3) around the outer edge of clamp (5). Put 5P960 Multipurpose Type Grease on the diaphragm.

6. Install the diaphragm unit in body (6).

7. Install washers and nuts (7). Tighten the nuts to a torque of 24 ± 7 N·m (18 ± 5 lb.ft.).

8. Put brake spring (9) and cover (8) into position on rod (10).



9. Install tooling (A). Use tooling (A) to put compression on spring (9) until cover (8) is in position in body (6).

10. Install the lockwashers and bolts (11). Tighten the bolts to a torque of 43 ± 7 N·m (32 ± 5 lb.ft.).

11. Put bracket (12) into position on the rotochamber, and install the two lockwashers and nuts (13) to hold it in place. Make sure the gasket that goes between the bracket and the bottom cover of the rotochamber is not damaged.

12. Install washers (14) and locknuts (15) on the rod as shown. Tighten the locknuts to a torque of 100 ± 14 N·m (75 ± 10 lb.ft.). The distance from the face of the rotochamber and the face of washer (14) must be 68.3 mm (2.69 in.).



NOTE: The expander ring (rubber) must be installed in the groove of the piston first. The seal ring (plastic) must be installed in the groove last.

13. Put clean SAE 10W oil on the seal ring, expander, ring (16) and rings (17). Install them on the power piston.

14. Put clean SAE 10W oil on lip-type seal (18), and install it on the piston with the lip toward the bottom cover of the rotochamber.

15. Put flange (19) and the gasket into position, and install breather assembly (20).



16. Apply pressure to the inlet port on the top of the rotachamber, and extend the rod and piston (21). Install the retainer ring to hold the piston in place.

17. Put tube assembly (22) into position over power piston (21), and push into flange (19).



18. Put clean SAE 10W oil on seals (23), and install them on head assembly (25).

19. Put the head assembly into position on the tube assembly, and install the four lockwashers and bolts (24). Tighten the bolts in the number sequence as shown to an initial torque of 13.6 N·m (10 lb.ft.). Tighten the bolts again in the same number sequence to a torque of 43 ± 7 N·m (32 ± 5 lb.ft.).

END BY:

a. install retarder and service brake master cylinder and rotochamber

Copyright 1993 - 2010 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees.

Wed May 12 23:03:14 CDT 2010

Página 10 de 10776B TRACTOR & 777B TRUCK 4YC00001-UP (MACHINE) POWERED BY...


armado y desarmado booster de frenos

Documents