KIT-UNLOADER 3076205 - Caterpillar

Remove the water temperature regulator according to the instructions that are in the Service Manual. Inspect the water temperature regulator for good condition. Ensure that the water temperature regulator operates properly according to the test procedure that is in the Service Manual.Replacing the water temperature regulator prior to failure is a recommended preventive maintenance practice because it reduces the chances for unscheduled downtime.Depending on load, a water temperature regulator that fails in a partially opened position will cause either an overheating or an overcooling condition.If the water temperature regulator fails in the closed position, it will cause excessive overheating. Excessive overheating could result in cylinder head cracking or piston seizure problems.If the water temperature regulator fails in the open position, it will cause the engine operating temperature to be too low during partial load operation. Low engine operating temperatures during partial loads could cause an excessive carbon buildup inside the cylinder. This excessive carbon buildup could result in accelerated ring and liner wear.
Failure to replace the water temperature regulator on a regularly scheduled basis could cause severe engine damage.Caterpillar engines incorporate a shunt design cooling system and require operating the engine with a water temperature regulator installed.If the water temperature regulator is installed wrong, the engine may overheat, causing cylinder head damage. Ensure that the new water temperature regulator is installed in the original position. Ensure that the water temperature regulator vent hole is open.DO NOT use liquid gasket material on the gasket or cylinder head surface.
Refer to the Service Manual for the temperature regulator replacement procedure, or consult with your Caterpillar dealer. If replacing water temperature regulators ONLY, drain the coolant from the cooling system to a level below the water temperature regulator housing.Refer to the Coolant Specifications in this publication for all information regarding acceptable water, coolant/antifreeze and SCA requirements, or consult your Caterpillar dealer for assistance.