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. Remove the alternator. Refer to Disassembly and Assembly Manual, "Alternator - Remove".

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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 into a suitable container for storage or disposal. The capacity of the cooling system is 32.6 L (8.60 US gal).

Note: The fan guard has been removed for photographic reasons.

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Illustration 1	g00530705

2. Loosen bolt (3) on idler (4) in order to release V-belt tension.

3. Remove V-belt (2) from water pump (1) and idler (4) .

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Illustration 2	g00531341

4. Identify inlet hose and outlet hose (6) for installation. Turn two valves (5) to the off position. Remove inlet hose and outlet hose (6) from water pump (1). Plug hoses (6) .

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Illustration 3	g00530707

5. Loosen hose clamp (10) and remove lower radiator hose (11). Loosen hose clamp (7). Remove four bolts (9) that hold water pump (1) to the engine. Remove water pump (1) from the engine and slide water pump (1) off hose (8). Check the condition of the large O-rings and the small O-rings. The O-rings are located on the back of water pump (1). If the O-rings are worn or damaged, replace the O-rings with new O-rings.