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C175 Tier 4 Final Engines for Caterpillar Built Machines Caterpillar


Control Cabinet - Disassemble

Usage:

793F D3T

Disassembly Procedure

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NOTICE

Ensure that the engine is stopped before any servicing or repair is performed.

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NOTICE

Inspect all O-rings, seals, and gaskets for wear and damage. Replace if necessary.

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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 product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.

Dispose of all fluids according to local regulations and mandates.

Note: Refer to Special Instruction, REHS8231, "Removal Procedures for Diesel Exhaust Fluid (DEF) Connectors" for the correct removal procedure of hose assemblies (2) and (5).

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    Illustration 1g06353346

  1. Disconnect latch (1).

  2. Remove 14 bolts (3) and two covers (4).

  3. Remove 28 bolts (5) and front cover (2).
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    Illustration 2g06353387

  4. Remove 18 bolts (6) and top cover (7).

    Note: Record the position of all tube and harness assemblies for use in assembly procedure.

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    Illustration 3g06357658

  5. Remove all mounting hardware (8).
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    Illustration 4g06358378
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    Illustration 5g06357953
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    Illustration 6g06361220

    Note: Hose assemblies on four diesel exhaust fluid pump groups (12) are color coded to assist with organization.

  6. Disconnect harness assemblies (14) and remove hose assemblies (9) and (10).

  7. Disconnect hose assembly (11) and position out of the way.

  8. Repeat Steps6 and 7 on four diesel exhaust fluid pump groups (12).

  9. Disconnect eight harness assemblies (14) from wiring harness (13) and electrical harness (15).

    Note: To maintain cleanliness, properly cap all hoses and ports.

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    Illustration 7g06358180

  10. Disconnect harness assemblies (16) from control valve assembly (17) and loosen hose clamp (20).

  11. Remove four bolts (18) and control valve/tube assembly (19).

  12. Repeat Steps 9 and 10 for each control valve/tube assembly (19).
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    Illustration 8g06358360

  13. Remove hose clamps (20) and hose assemblies (21) and (23).

  14. Remove four bolts (22).
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    Illustration 9g06359805

  15. Release special connector (24).

  16. Disconnect harness assembly (26).

  17. Remove three bolts (25) and diesel exhaust fluid pump group (12).

  18. Repeat Steps 14 through 16 for each diesel exhaust fluid pump group (12).
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    Illustration 10g06359798

  19. Pull two tabs (29) on harness assemblies (27) and (28) to disconnect and position out of the way.

  20. Remove four bolts (30) and electronic control module (31).
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    Illustration 11g06361134
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    Illustration 12g06361131

  21. Disconnect two hose assemblies (32) and position out of the way.

  22. Disconnect two harness assemblies (33).

  23. Loosen two hose clamps (20) and remove six bolts (34) on each hose assembly attached to diesel exhaust fluid manifold assembly (35).

  24. Remove two diesel exhaust manifold assemblies (35A) and two diesel exhaust manifold assemblies (35).

  25. Remove four bolts (36) and solenoid valve and mounting group (37).

  26. Repeat Steps 21 through 24 on the opposite side.
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    Illustration 13g06361113

    Note: If dropped onto a hard surface, this part should NOT be used.

  27. Loosen hose clamp (38) from position (39) and remove filter (41).

  28. Remove hose clamp (20) and hose assembly (40).

  29. Remove plate (42).
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    Illustration 14g06359115

  30. Disconnect harness assembly (44), remove two bolts (43), and solid-state relay assembly (45).

  31. Remove two bolts (46) and position switch assembly (47) out of the way.
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    Illustration 15g06359119

  32. Remove two covers (48).
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    Illustration 16g06359288

  33. Loosen two bolts (49) enough to remove two connector plug assemblies (50).
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    Illustration 17g06359305

  34. Remove four bolts (51), electronic control group (54), and bracket (55).

  35. Remove hose assemblies (52) and (53).

  36. Remove voltage control. Refer to Disassembly and Assembly, "Voltage Control (Load Protection) - Remove and Install".
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    Illustration 18g06359310

  37. Remove two bolts (56) and push connector receptacle assembly (57) inside.
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    Illustration 19g06359321

  38. Remove bolt (58) and position electric line (59) out of the way.
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    Illustration 20g06359345

  39. Remove bolt (60) and position three ground wires (61) out of the way.
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    Illustration 21g06359348

  40. Disconnect four plugs (64).

  41. Remove four nuts (62) and four relays (63).
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    Illustration 22g06359351

  42. Remove four bolts (65) and block assembly (66).

  43. Remove two nuts (67) and push two receptacle assemblies (68) inside.
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    Illustration 23g06360774

  44. Remove electrical harness/tube assembly (13) from tank (69).
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    Illustration 24g06359760

  45. Remove six bolts (70) and heater valve (71).
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    Illustration 25g06360736

  46. Remove four bolts (72) and cover (73).
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    Illustration 26g06360739

  47. Remove four bolts (74) and DEF manifold group (75).
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    Illustration 27g06359766
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    Illustration 28g06359769

  48. Remove two clamps (78) and tube assembly (79). One clamp (78) is not shown.

  49. Remove nut (76) adapter (77). Nut (76) is not shown.
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    Illustration 29g06359772

  50. Remove plug (80).
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    Illustration 30g06359774

  51. Open lock (81) and remove cap (82).
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    Illustration 31g06359775

  52. Remove screen (83). Inspect screen (83) for contaminants. Clean or replace if necessary.

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