HOSE AS 8W4202 - Caterpillar

Remove And Install Water Pump
1. Drain the coolant from the engine.2. Remove the alternator and alternator mounting group from the engine if so equipped. 3. Loosen the clamps on breather tube (1), and pull it back for clearance. Loosen the clamps on hose (3). Slide hose (3) off of the water pump cover.4. Remove two bolts and remove elbow (2). 5. Remove bolt (4) from the cover on the side of the cylinder block. 6. Remove the three bolts that hold cover (5) to the water pump. Remove cover (5) from the water pump. 7. Remove the two bolts, and remove elbow (7) from bonnet (6). Remove the two bolts, and remove bonnet (6) from the water pump. It is not necessary to remove bolts (10). These bolts only hold the cover to the timing gear cover.8. Remove six long bolts (9) that hold the water pump to the timing gear cover. Remove water pump (8). The following steps are for the installation of the water pump.9. Check the O-ring seals and gaskets, and make replacements if needed. 10. Make sure O-ring seal (11) is in position on the water pump. Put water pump (8) into position in the timing gear cover. Install the bolts that hold the water pump in place.11. Make sure the gaskets are in place. Connect bonnet (6) to the water pump. Connect elbow (7) to the bonnet. 12. Make sure O-ring seal (12) is in position, and install cover (5) on the water pump.13. Install bolt (4) on the cover on the side of the engine.14. Put breather tube (1) in position, and install the clamps that hold it.15. Install the alternator mounting group and alternator on the engine if so equipped. 16. Install the gasket and O-ring seal on elbow (2). Lubricate the O-ring seal with clean oil. Install elbow (2)in the bore of the water pump. Use two bolts to fasten the elbow to the cylinder head.17. Slide hose (3) into position on the water pump. Tighten the hose clamp.18. Fill the cooling system to the correct level. See the Maintenance Manual.Disassemble And Assemble Water Pump
Start By:a. remove water pump The water pump seal can be replaced without removing the water pump from the engine.An intermittent leakage of a small amount of coolant from the hole in the water pump housing is not an indication of a water pump seal failure. This is required to provide lubrication for the seal. Replace the water pump seal only if a large amount of leakage or a constant flow of coolant is observed draining from the water pump housing. 1. Remove O-ring seal (3) from adapter (4). Remove the adapter from housing (7). Remove the O-ring seal from the outside of the adapter.2. Remove bolt (1) and washer (2). Use tooling (A) to remove impeller (6) from shaft (13).3. Remove spring and seal (5) from the shaft.4. Remove four bolts (16) from retainer (12) that hold the shaft assembly to the pump housing. Remove