HARNESS AS 4534703 - Caterpillar

Turn the fuel supply to the OFF position.
Illustration 1 g03827869
Remove bolts (1), bolts (2), and guard (3).
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Remove plug (4) and the O-ring seal.
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Use Tooling (A) to rotate the crankshaft until the timing mark on the fuel pump is visible through the inspection hole. Install Tooling (B) and tighten to a torque of 9 1 N m (80 9 lb in).Note: Mark the damper in relation to the front timing cover as a visual reference to ensure that the crankshaft has not moved while the fuel injection pump is removed.Note: The pump will not function while Tooling (B) is installed. Running the fuel injection pump with the tooling installed will result in pump damage and system contamination.
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Remove bolts (8) and clamps (9).
Remove clamps (6), hose (7), bolts (10), and tube assembly (5).
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Disconnect hose assembly (11) and hose assembly (13).
Remove bolt (15) and clamps (14).
Disconnect tube assembly (16). Remove adapter assembly (12).
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Disconnect tube assembly (17) and tube assembly (18).
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Remove lock nuts (19) and adapter assembly (20).
Remove nut (22), stud (23), and plate (21).
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Disconnect harness assemblies (24).
Illustration 9 g03828048Note: All high-pressure fuel line connections to be closed with protective caps.
Remove bolt (26) and clamps (25).
Disconnect tube assembly (27).Note: If tube assembly (27) is loosened or removed after tightening, tube assembly (27) is to be discarded and replaced.
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Remove nut (28), nut (30), stud (29), stud (31), and bracket (32).
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Remove bolts (33) and fuel injection pump (34).
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Remove adapter assembly (35), elbow assembly (36), adapter assembly (37), adapter assembly (38), and adapter assembly (39).Installation Procedure
Install fuel injection pump (34) in the reverse order of removal.
Tighten nut (30) and nut (22) to a torque of 28 7 N m (248 62 lb in).
Hand tighten both ends of tube assembly (27).
Loosely install clamps (25) and bolt (26.)
Tighten nut at pump and quill side of tube assembly (27) to a torque of 8 N m (71 lb in). Turn nut an additional 70° 5° clockwise.
Tighten nut at rail side of tube assembly (27) to a torque of 10 N m (89 lb in). Turn nut an additional 90° 5° clockwise.
Adjust clamps (25) and fully tighten bolt (26).
Lubricate the bore of tube assembly (5) with lubricate that is being sealed.
Tighten clamps (6) to a torque of 100 5 N m (74 4 lb ft).