C-15, C-16 and C-18 Truck Engines Caterpillar

Water Temperature Regulator - Remove and Install

Usage:

C-15 6NZ

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

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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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Drain the coolant from the engine into a suitable container for storage or disposal.
Disconnect the upper radiator hose from the manifold housing.
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Illustration 1 g00615062

Typical example
Loosen hose clamps (1). Remove three bolts (3).
Remove water temperature regulator housing (2) and manifold (4) for the water temperature regulators as a unit.
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Illustration 2 g00494763
Remove gasket (5) from manifold (4) for the water temperature regulators.
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Illustration 3 g00494766
Remove four bolts (6). Separate water temperature regulator housing (2) from the manifold for the water temperature regulators.
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Illustration 4 g00494803
Remove gasket (7) from manifold (4) for the water temperature regulators.
Remove two water temperature regulators (8) from water temperature regulator housing (2).
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Illustration 5 g00494820
Remove two lip seals (9) from water temperature regulator housing (2).

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-0510	Driver Group	1

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

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Install two lip type seals (9) in the water temperature regulator housing with Tool (A). Install the lip type seals until the seals are in the seat of the counterbore of the water temperature regulator housing.
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Illustration 7 g00494803

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NOTICE

The water temperature regulators must be installed in the water temperature regulator housing, as shown, or the engine will overheat.
Install two water temperature regulators (8) in water temperature regulator housing (2).
Put gasket (7) in position between water temperature regulator housing (2) and manifold (4) for the water temperature regulator.
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Illustration 8 g00494766
Put water temperature regulator housing (2) in position on manifold (4) for the water temperature regulator. Install four bolts (6) and tighten the bolts to a torque of 50 ± 10 N·m (37 ± 7 lb ft).
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Illustration 9 g00494763
Install gasket (5) on manifold (4) for the water temperature regulator.
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Illustration 10 g00615062

Typical example
Put water temperature regulator housing (2) and manifold (4) for the water temperature regulator in position on the engine.
Install three bolts (3). Tighten hose clamps (1).
Fill the cooling system to the correct coolant level. Refer to Operation and Maintenance Manual, "Refill Capacities" in the Maintenance Section.