Armado de Freno de Servicio y de Estacionamiento Mf 793

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Producto: TRUCK

Modelo: 793C TRUCK ATY

Configuracin: 793C Truck 3516 Engine ATY00001-UP (MACHINE)

Desarmado y Armado793C Off-Highway Truck Machine Systems

Nmero de medio -RENR2535-12 Fecha de publicacin -01/10/2009 Fecha de actualizacin -26/10/2009

i03742880

Service and Parking Brake (Rear) - Assemble

SMCS - 4251-016

Assembly Procedure

Required Tools

Tool Part Number Part Description Qty

A 1P-7405 (3/8 inch NC Lifting Eye) 2

B FT-0841 Spring Compressor 1

Table 1

Illustration 1 g00440250

Install O-ring seal (32) on ring (29) .1.

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Install plate (30) , 44 bolts (31) , and the washers on ring (29) . The weight of plate (30) is 110

kg (242.5 lb). Tighten bolts (31) to a torque of 500 50 Nm (368.8 36.9 lb ft).

2.


NOTICE

Failure to follow the recommended procedure or the specified toolingthat is required for the procedure could result in damage to

components.

To avoid component damage, follow the recommended procedureusing the recommended tools.




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Turn over the assembly. Install two dampers (27) , the 15 friction discs, and 14 plates (28) onthe service brake assembly.

3.

Note: When the two dampers, the 15 friction discs, and the 14 plates are installed, begin with adamper. Next, install a friction disc. Then, install a plate. Continue installing the friction discsand the plates. After the last friction disc is installed, install the other damper.


Install eight studs (26) on ring (29) . Tighten studs (26) to a torque of 100 15 Nm (73.8 11.1 lb ft).

4.


Install four plugs (23) and the four O-rings on anchor (3) .5.

Install 21 studs (25) and 47 studs (24) on anchor (3) . Tighten studs (24) to a torque of 230 30Nm (169.6 22.1 lb ft). Tighten studs (25) to a torque of 400 40 Nm (295.0 29.5 lb ft).

6.




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Install three O-ring seals (19) , (20) , and (21) on anchor (3) .7.

Install 12 studs (22) on anchor (3) .8.




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Install 46 springs (17) and 42 inner springs (18) on anchor (3) .9.

Note: There are four springs (17) at location (X) that do not have inner springs (18) . Refer tothe identification marks on the springs for installation purposes.


Install guide spring (6) and guide (7) in piston (13) . Use Tooling (B) to compress guide spring(6) . Install the pin. Repeat this step for the remaining three pins, guides (7) , and guide springs(6) .

10.


Install O-ring seal (16) on piston (13) .11.




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Install two seal rings (14) . Install two seal rings (15) on housing (12) .12.

NOTICE

Failure to follow the recommended procedure or the specified toolingthat is required for the procedure could result in damage to

components.

To avoid component damage, follow the recommended procedureusing the recommended tools.

Note: During installation, proper orientation of the seal rings is important. Improper installationof the seal rings can cause the seals to leak.

Note: The yellow side (C) of inside seal ring (D) must face out.




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Seal rings that are incorrectly installed.


Seal rings that are correctly installed.




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Install piston (13) on anchor (3) .13.


Install housing (12) on the service brake assembly. Install 12 nuts (11) on housing (12) .Tighten nuts (11) by one turn at a time in order to draw the housing downward. After 12 nuts(11) have bottomed out, tighten the nuts to a torque of 271 24 Nm (200 18 lb ft). The nutsshould be tightened in a crisscross pattern.

14.




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Install two ring seals (9) . Install two ring seals (10) on piston (5) .15.

Note: During installation, proper orientation of the seal rings is important. Improper installation

of the seal rings can cause the seals to leak.

Note: The yellow side (C) of inside seal ring (D) must face out.


Seal rings that are incorrectly installed.




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Seal rings that are correctly installed.


Use Tool (A) and a suitable lifting device to install piston (5) . The weight of piston (5) is 83 kg

(183.0 lb).

16.

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Press down piston (5) . Install four pins (8) in four guides (7) .17.


Install two 3/8 inch - 16 NC forcing screws in piston (5) . Evenly tighten forcing screws inorder to compress the guide springs.

18.

Remove the four pins from four guides (7) .19.

Remove the forcing screws from piston (5) .20.




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Turn over the service brake assembly. Install twelve bolts (1) and the washers that are identifiedin the picture on the service brake assembly.

25.

End By: Install the front service and parking brakes that are on the right or the left. Refer toDisassembly and Assembly, "Service and Parking Brake (Rear) - Install" for the correct procedure.

Copyright 1993 - 2011 Caterpillar Inc.

Todos los derechos reservados.

Red privada para licenciados del SIS.

Sat Jun 25 09:07:49 UTC-0300 2011


Armado de Freno de Servicio y de Estacionamiento Mf 793

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