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793C Off-Highway Truck Machine Systems Caterpillar


Cab - Remove

Usage:

793C 4AR

Removal Procedure

Start By:

  1. Install the retaining cable. Refer to Disassembly and Assembly, "Truck Body Retaining Cable - Remove and Install" for the correct procedure.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.

Dispose of all fluids according to local regulations and mandates.

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------ WARNING! ------

The space between the body and the frame becomes a zero clearance area when the body is lowered. Failure to install the retaining cable can result in injury or death to personnel working in this area.

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------ WARNING! ------

Personal injury can result from hot oil or hot components.

At operating temperature, oil is hot and under pressure. Hot oil can cause burns.

Remove the fill cap only when the engine is stopped, and the fill cap is cool enough to touch with your bare hand.

Do not allow hot oil or components to contact skin.

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    Illustration 1g00488496

    (A) Cab. (B) Handhold. (C) Catwalk.

  1. Remove four bolts (2), four washers, two clamps (3), and mirror (1) .
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    Illustration 2g00488497

    (A) Cab. (B) Handhold. (C) Catwalk. (E) Rear Cab Support.

  1. Remove five nuts (9), ten washers, five bolts (10), strip (11), and mud flap (8) .

  1. Remove five nuts (19), ten washers, five bolts (20), strip (21), and mud flap (22) .

  1. Remove 12 nuts (16), 24 washers, 12 bolts (17), strip (15), and mud flap (18) .

  1. Remove two nuts (4), four washers, two bolts (5), and plate (6) .

  1. Remove four nuts (12), eight washers, four bolts (13), and plate assembly (14) .
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    Illustration 3g00488498

    (A) Stairs. (B) Left Fender.

  1. Remove five bolts (26), five washers, and plate (27) .

  1. Remove four bolts (28), four washers, and bracket (29) .

  1. Remove eight bolts (23), eight washers, plate (24), and mud flap (25) .
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    Illustration 4g00488499

    (A) Cab.

  1. Use a suitable hoist to support hand rail (31). Remove 12 bolts (34), 12 washers, and hand rail (31) .

  1. Remove four bolts (33) and four washers.

  1. Use a suitable hoist to support hand rail (30). Remove 16 bolts (32), 12 washers, and hand rail (30) .
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    Illustration 5g00488521

    Top view of the left air cleaner

    (A) Left air cleaner.

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    Illustration 6g00488523

  1. Remove two nuts (40), four washers, two bolts (41), and brace (42) .

  1. Repeat Step 13 for remaining brace (43) .

  1. Remove two locknuts (37) and U-bolt assembly (38) .

  1. Disconnect tube (35) from adapter (36) .

  1. Loosen two clamps (44). Disconnect two hoses (45) .

  1. Loosen clamp (46). Disconnect hose (47) .

  1. Remove air line (39) .

  1. Remove three bolts (48), three washers, and guard (49) .

  1. Remove two nuts (51), four washers, two bolts (52), and brace (50) .
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    Illustration 7g00488524

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    ------ WARNING! ------

    In order to prevent possible personal injury, release the air pressure from the air tank before disconnecting any components of the air system.

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  1. Release the pressure in the air tank.

  1. Disconnect five assemblies (56). Remove five O-ring seal (57). Disconnect hose assemblies (54) and (55) .

    Note: Prevent the contamination of the hydraulic system when the hose assemblies and the components are removed from the machine. The contamination of the hydraulic system with foreign material will reduce the service life of the components in the hydraulic system.

  1. Remove bolt (58), the washer, and clip (59). Disconnect hose assembly (60) from the air horn.

  1. Disconnect hose assemblies (61) and (62) from the heater coil.
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    Illustration 8g00488526

  1. Use a suitable hoist to support the weight of air cleaner (67). The air cleaner weighs approximately 191 kg (421.1 lb).

  1. Remove ten bolts (66), ten washers, two plate assemblies (63), plate (64), and two plates (65). Remove air cleaner (67) .
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    Illustration 9g00488527

  1. Disconnect two electrical connections (71) .

  1. Remove two bolts (69) and two clamps (70). Reposition harness (68) .
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    Illustration 10g00488529

  1. Use a suitable hoist to support the weight of fender assembly (73). The fender assembly weighs approximately 48 kg (105.8 lb).

  1. Remove nine bolts (72), nine washers, and fender assembly (73) .
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    Illustration 11g00488534

    (A) Cab.

  1. Remove three nuts (76), six washers, and three bolts (77) .

  1. Remove two bolts (78) and two washers.

  1. Use a suitable hoist to support catwalk (79). Catwalk (79) weighs approximately 62 kg (136.7 lb).

  1. Remove ten bolts (75), ten washers, and catwalk (79) .

  1. Use a suitable hoist to support catwalk (74). Catwalk (74) weighs approximately 37 kg (81.6 lb).

  1. Remove eight bolts (75), eight washers, and catwalk (74) .
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    Illustration 12g00488535

  1. Disconnect seven electrical connections (82) .

    Note: Before disassembly, mark the harnesses and the hose assemblies for installation purposes.

  1. Disconnect nine hose assemblies (80). Remove nine O-ring seals (81) .

  1. Disconnect tube (83) .

  1. Remove bolt (84). Disconnect ground strap (85) .
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    Illustration 13g00488537

  1. Use a suitable hoist to support the weight of cab. The cab weighs approximately 1705 kg (3758.9 lb).

  1. Remove eight bolts (86), eight spacers (87), and eight retainers (88). If necessary, remove eight mounts (89) .
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    Illustration 14g00488538

  1. Remove six bolts (90), six spacers (87), and six retainers (88). If necessary, remove six mounts (89) .

  1. Remove six bolts (91), six spacers (87), and six retainers (88). If necessary, remove six mounts (89) .
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    Illustration 15g00488540

  1. Remove cab (92) .
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    Illustration 16g00489468
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    Illustration 17g00489470
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    Illustration 18g00489473
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    Illustration 19g00489488

  1. Remove 20 mounts (89). Remove shims (93) and shims (94) .
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    Illustration 20g00489490

  1. Use a suitable hoist to support the weight of support assembly (99). Support assembly (98) weighs approximately 182 kg (401.2 lb).

  1. Remove ten bolts (95), ten spacers (96), and support assembly (99) .

  1. Use a suitable hoist to support the weight of support assembly (100). Support assembly (100) weighs approximately 240 kg (529.1 lb).

  1. Remove six bolts (97), six bolts (98), 12 spacers (96), and support assembly (100) .

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