PLATE 1981203 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Drain the coolant from the cooling system to a level below the water temperature regulator into a suitable container for storage or disposal.
Loosen the hose clamp from the upper radiator hose and remove the upper radiator hose from the water temperature regulator housing.
Illustration 1 g00953937
Remove the setscrews (2) that hold the water temperature regulator housing (1) in position on the cylinder head. Remove the water temperature regulator housing. Remove the O-ring seal from the water temperature regulator housing. Discard the O-ring.
Squeeze the retainers (A) and rotate the water temperature regulator in order to release the water temperature regulator from the tabs of the water temperature regulator housing.
Refer to Systems Operation, Testing and Adjusting, "Water Temperature Regulator - Test" for the correct procedure on testing the water temperature regulator. Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Clean the water temperature regulator housing.
Illustration 2 g00953937
Position the water temperature regulator (3) in the water temperature regulator housing. Squeeze the retainers (A) and rotate the water temperature regulator in order to secure the water temperature regulator to the water temperature regulator housing. Note: The retainers (A) must be inserted behind the tabs of the water temperature regulator housing in order to secure the water temperature regulator during engine operation.
Install a new O-ring seal on the water temperature regulator housing (1). Lubricate the O-ring seal with red rubber grease. Position the water temperature regulator housing on the cylinder head.
Install the setscrews (2) that fasten water temperature regulator housing (1) to the cylinder head.
Install the upper radiator hose and tighten the hose clamps. Refer to the Torque Specifications Manual for the correct torque.
Fill the cooling system to the proper level. Refer to the Operation and Maintenance Manual, "Refill Capacities" for further information.