3116 Engine for Challenger 35, Challenger 45 Agricultural Tractors and 3126 Engine for Challenger 55 Agricultural Tractor Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Open the hood and apply the hood latch.

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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.

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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 Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

1. Drain the coolant until the level is below the water temperature regulator. The coolant must be drained into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the correct capacity.

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Illustration 1	g00530197

2. Disconnect upper radiator hose (1) .

3. Remove two bolts and washers (2). Remove pipe (3) and gasket (4) .

4. Remove the water temperature regulator.

Installation Procedure

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NOTICE
If the water temperature regulator is installed incorrectly, it will cause the engine to overheat.

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Illustration 2	g00530197

1. Insert the water temperature regulator into the housing.

2. Inspect gasket (4) for wear or damage. If necessary, replace the gasket. Put gasket (4) and pipe (3) in position and install two bolts and washers (2) .

3. Connect upper radiator hose (1) .

4. Fill the cooling system with coolant to the correct level. Refer to the Operation and Maintenance Manual for the correct filling procedure.

End By: Release the hood latch and close the hood.