NUT (3/4-16) 1885856 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9S-1366 Bolt 2 Note: The water pump seal can be replaced when the water pump is mounted on the engine. Use the following procedure to replace the water pump seal.
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.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Drain the coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct draining procedure.
Illustration 1 g03885053
Remove bolts (1).
Illustration 2 g03885055
Remove bolts (2). Remove bolts (4) and remove tube and elbow assembly (3).
Illustration 3 g03885054
Disconnect harness assemblies (6). Remove bolts (5) and manifold (7).
Illustration 4 g03885066
Remove bolts (13) and housing (8).
Remove O-ring seal (12) from the housing.
Loosen bolt (9) that holds impeller (11) in place. Do not remove the bolt.
Use a block and Tooling (A) to put tension on impeller (11). Tap on the center of the block in order to loosen impeller (11) on the shaft.
Remove the following components from the shaft: bolt (9), washer (10) and impeller (11).
Remove seal group (14).