GASKET 4W6638 - Caterpillar

Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 242-9955 Puller (Two Jaw) 1
B 193-8094 Spline Socket 1
C 1P-0510 Driver Gp 1
D 5P-4758 Retaining Ring Pliers As 1
E 280-2059 Spanner Wrench Assembly 1
F 8T-0276 Bolt 2
G 8H-0663 Bearing Puller Gp 1 Start By:
Remove the auxiliary water pump. Refer to Disassembly and Assembly, "Auxiliary Water Pump - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Disassemble the Check Valve
Note: If the hose assembly is leaking, the entire hose assembly must be replaced.
Illustration 1 g01644713
Remove hose assembly (1), check valve (2), and the gasket from the auxiliary water pump.
Illustration 2 g01644824
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Use Tooling (D) in order to remove retainer (3) from the body of check valve (2).
Remove spring (4) and disc (5) from the body of check valve (2). Disassemble the Pump
Illustration 3 g01645413
Remove bolts (6) and cover (7). Remove O-ring seal (8) from cover (7).
Illustration 4 g01645415
Remove port plate (9).
Illustration 5 g01645633
Use Tooling (B) to hold the end of the drive shaft. Remove bolt (10), thrust washer (11), and the O-ring seal.
Illustration 6 g01645634Note: Note the orientation of the locking rings during removal.
Position the auxiliary water pump in a vertical position on suitable cribbing. Ensure that the shaft assembly is supported. Use Tooling (C) and a suitable hammer to tap impeller (13). This will release the taper on locking rings (12). Remove lock rings (12), impeller (13), ring (14), O-ring seal (15), and port plate (16).
Illustration 7 g01645635
Remove bolts (17). Use bolts (17) as forcing bolts in order to remove body (18). Remove O-ring seal (19) from body (18).
Illustration 8 g01646414
Use Tooling (A) and Tooling (C) in order to remove impeller (20).
Illustration 9 g01646456
Remove the rotating segment of seal assembly (21) from the pump body.
Illustration 10 g01646457
Place the auxiliary water pump in a vertical position on suitable cribbing, as shown. Remove bolts (23) from bearing housing (22). Use Tooling (F) in Holes (24) in order to separate bearing housing (22) from the pump body.
Illustration 11 g01721917
Use Tooling (C) and a suitable press to remove the stationary segment of seal assembly (21) from the pump body.
Illustration 12 g01646635
Use Tooling (D) to remove retaining ring (25) from bearing housing (22).
Illustration 13 g01646637
Remove setscrews (27) from seal collar (28). Use a suitable press to remove shaft assembly (26) from bearing housing (22). Remove shaft assembly (26), seal collar (28), and the O-ring seal.
Illustration 14 g01646638
Illustration 15 g01723074
Use Tooling (B) and Tooling (E) to remove locknut (29) from shaft assembly (26).
Use Tooling (G) and a suitable press to remove bearing (30) from shaft assembly (26).
Illustration 16 g01646918
Remove oil seal (31) from bearing housing (22). Use Tooling (D) to remove retaining ring (32). Remove roller bearing (33) and bearing race (34) from bearing housing (22). Check the condition of the O-ring seal on the oil supply orifice. Replace the O-ring seal, if necessary.