DIFFUSER 5397201 - Caterpillar

Remove bolt (18) and cap (17). Remove bolts (19) and manifold (20).
Illustration 9 g03365521
Remove O-ring seals (23) from cap (21). Remove plug (24) and plug (25) from manifold (21).
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Disconnect harness assembly (26) and remove solenoid assembly (27).
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Remove relays (28).
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Remove bolts (29). Remove control module (30).
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Disconnect harness assembly (33). Remove cable straps (32). Remove electronic control (31).
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Remove cover (34).
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Remove expansion device (35).
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Remove filter (36).
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Remove cable straps (38), bolts (39), and bracket (37).
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Disconnect harness assembly (40).
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Remove bolts (41). Separate support assembly (42) from pump (43).
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Remove cable straps (45) and harness assembly (44).
Illustration 21 g06003622Note: Place identification marks on DEF pump coolant connectors (46) and DEF pump connectors (47) for installation purposes. DEF pump coolant connectors (46) and DEF pump connectors (47) are not interchangeable.
Remove DEF pump coolant connectors (46) and DEF pump connectors (47) . Remove the O-ring seals.
Illustration 22 g06040542
Remove bracket (48). Remove hose assembly (49).
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Remove nuts (53). Remove straps (52). Remove tank (50) from support assembly (51).