C18 Generator Set Engines Caterpillar

Diesel Exhaust Fluid Module - Assemble

Usage:

Specifications

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Illustration 1	g03368670
Typical example

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Table 1
Specification for 378-3179 DEF Pump and Mounting Gp and 378-3182 DEF Pump and Mounting Gp
Item	Qty	Part	Specification Description
1	3	230-2603 Bolt	Torque to 19 ± 2 N·m (168 ± 18 lb in) with maximum wrench speed of 60 rpm. Use of impact tool is prohibited.
2	1	378-3188 Filter Cap	Torque to 20 ± 5 N·m (177 ± 44 lb in).

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Illustration 2	g03370951

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Table 2
Specification for the 378-3184 Electronic Control and Mounting Gp and 378-3190 Electronic Control and Mounting Gp
Item	Qty	Part	Specification Description
1	3	355-6247 Bolt	Torque to 10.0 ± 2.0 N·m (88.5 ± 17.7 lb in).

Assembly Procedure

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Table 3
Required Tools
Tool	Part Number	Part Description	Qty
A	-	Distilled Water	-
		De-ionized Water
		Diesel Exhaust Fluid (DEF)

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Illustration 3	g06003622

Note: DEF pump coolant collectors (46) and DEF pump coolant collectors (47) must be installed in the original location when removed. DEF pump coolant collectors (46) and DEF pump coolant collectors (47) are not interchangeable.

Install the O-ring seals (not shown) , DEF pump coolant collectors (46) and DEF pump coolant collectors (47).
Tighten fittings (46) to a torque of 5.5 ± 0.5 N·m (48 ± 4 lb in).
Tighten fittings (47) to a torque of 4.5 ± 0.5 N·m (40 ± 4 lb in).
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Illustration 4 g03366053
Install harness assembly (44) and cable straps (45).
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Illustration 5 g03366046

Note: Do not use an impact on bolts (41).
Install pump (43) in support assembly (42).
Install bolts (41). Tighten bolts (41) to a torque of 19 ± 2 N·m (168 ± 18 lb in).
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Illustration 6 g03366035
Connect harness assembly (40).
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Illustration 7 g03366015

Note: Do not use an impact on bolts (39).
Install bracket (37), bolts (39), and cable straps (38).
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Illustration 8 g03383610
Install filter (36).
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Illustration 9 g03383609
Install expansion device (35).
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Illustration 10 g03383608
Install cover (34). Tighten cover (34) to a torque of 20 ± 5 N·m (177 ± 44 lb in).
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Illustration 11 g03365554
Install electronic control (31).
Install cable straps (32) and connect harness assembly (33)
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Illustration 12 g03365547
Install control module (30) and bolts (29). Tighten bolts (29) to a torque of 10 ± 2 N·m (89 ± 18 lb in).
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Illustration 13 g03365540

Note: Do not use an impact on the bolts for relays (28).
Install relays (28).
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Illustration 14 g03365528

Note: Do not use an impact on the bolts for solenoid assembly (27).
Install solenoid assembly (27) and connect harness assembly (26).
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Illustration 15 g03365521
Install plug (24) and plug (25) on manifold (22).
Install O-ring seals (23) in cap (21).
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Illustration 16 g03365514

Note: Do not use an impact on bolts (19).
Install manifold (20), bolts (19), cap (17), and bolts (18). Tighten bolts (18) to a torque of 6 ± 1 N·m (53 ± 9 lb in).
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Illustration 17 g03365493
Install bracket (16) on the tank.
Install bolts (15).
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Illustration 18 g03365477
Install pump assembly (14) and bolts (13).
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Illustration 19 g03365475

Note: Do not use an impact on bolt (12).
Install bolt (12). Tighten bolt (12) to a torque of 4 ± 1 N·m (35 ± 9 lb in)
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Illustration 20 g03365468
Install bolts (11).
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Illustration 21 g03365465
Install the gasket (not shown), manifold (10), plate (9), and bolts (8). Tighten bolts (8) in an alternating sequence to a torque of 5 ± 1 N·m (44 ± 9 lb in). Tighten bolts (8) a second time in an alternating sequence to a torque of 5 ± 1 N·m (44 ± 9 lb in).
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Illustration 22 g03365463
Connect harness assembly (7) and install cable straps (6).
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Illustration 23 g03365452

Note: Do not use an impact on the bolts for clips (1) and (5).
Install hoses (3). Apply Tooling (A) to the O-rings (not shown) inside hose assemblies (4). Connect hose assemblies (4) and harness assemblies (2). Install clips (1). Tighten the bolts for clips (1) to a torque of 6 ± 1 N·m (53 ± 9 lb in). Install clips (5).
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Illustration 24 g03350789

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Illustration 25 g03376333
Install tank (48) in support assembly (49).
Install straps (50) and nuts (51). Tighten nuts (51) to a torque of 8 ± 2 N·m (71 ± 18 lb in). Torque nuts (51) to a final torque of 11 ± 1 N·m (97 ± 9 lb in).
Note: Only apply torque once to nuts (51) when tightening straps (50). Apply torque to nuts (51) in the W, X, Y, Z sequence shown in Illustration 25.
Note: Two types of straps are used to support different tank configurations. Only apply torque once to the nuts on both types of straps.
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Illustration 26 g03349224
Install bracket (46) and hose assembly (47).