PISTON & ROD GP 1618420 - Caterpillar

Remove Water Temperature Regulators
1. Drain the cooling system until the level of the coolant is below the exhaust manifolds. 2. Remove the bolts that hold flanges (2) to the expansion tank.3. Remove the bolts that hold housing (1) to the regulator housing. Remove housing (1), the two tubes and flanges (2) as a unit from the engine. 4. If necessary, remove ferrule (3) and the ball from housing (1). 5. Remove regulators (4) from the regulator housing.6. Remove the gaskets from the regulator housings, flanges and expansion tank. 7. If necessary, remove ferrule (5) and the ball and lip-type seals (6) from the regulator housing.Install Water Temperature Regulators
1. Install the ball and ferrule (1) in the regulator housing. Make sure the end of ferrule (1) with the holes is toward the inside. Install the ferrule until it makes contact with the bottom of its bore in the housing.2. Use tool group (A), and install the water temperature regulator seals in the housing. Make sure the lips of the seals are toward the inside as shown.
If the water temperature regulators are installed wrong, it will cause the engine to overheat.
3. Install water temperature regulators (2) in the housing with the springs up as shown. 4. Install the ball and ferrule (3) in housing (4). Make sure the end of ferrule (3) with the holes is toward the inside. Install ferrule (3) until it makes contact with the bottom of its bore in housing (4). 5. Put the gaskets for housing (4) and flanges (5) in position. Install housing (4), the tubes and flanges (5) on the engine.6. Fill the cooling system with coolant to the correct level. See the Maintenance Manual.