SEAL-O-RING 3B8453 - Caterpillar

Note: Whenever the lower bearing is replaced, the upper bearing must be replaced as well.Removal Procedure
Illustration 1 g00985643
(1) (1) Screw (2) Assembly (Rotor Position Sensor) (3) O-ring (4) Hex Bolt (5) Wheel (Rotor) (6) Spacer (7) Screw (8) Shipping Plug (9) Plug with an O-ring (10) O-ring (11) Assembly (Top Bearing) (12) Sensor (Vacuum) (13) Assembly (Bottom Bearing) (14) Spacer (15) Retaining Bolt (16) Mounting Hardware for the Drain (Charge) (17) Mounting Hardware for the Drain (Charge) (18) Drain (Charge) (19) Load Plate (20) Shims (Load Cell) (21) Load Cell and Base Plate Assembly (22) Hex Bolt (23) Spacer (24) Hex Bolt with Polished Head (25) Screw (26) O-ring (27) Assembly (Static Drain)
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     190-8386     Shim     4    
B     191-5217     Guide Pin     1    
C     190-8385     Bearing Puller Gp     1    
Shut down the System before attempting to remove the lower bearing. Refer to the Testing and Adjusting, "System Shutdown" for the proper shutdown procedure.
Illustration 2 g00843202
Remove vacuum hose (30) from the system. This relieves the vacuum from the system.
Disconnect the following items from the bottom of the flywheel: the 19 pin instrument connector and the cable for the thermistor.Note: Skip forward to steps 13 through 12 if this system is equipped with an assembly (load cell). Refer to Illustration 1.
Disconnect the 19 pin instrument connector.
Disconnect the yellow connector for the thermistor.
. Remove four screws (25). Remove Assembly (Static Drain) (27) .
Remove polished rotor retainer bolt (24) .
Illustration 3 g00852370
Use four feeler gauges. Measure the gap that is between the bearing cartridge and the end plate. Take measurements at four locations. The measurements will be used during the installation of the new bearing. Record the results in table 2.
Table 2
Location    Measurement    
1        
2        
3        
4        
Remove 6 bolts (22) that are holding the load cell.
Remove the load cell (21) .
Remove the Shims (Load Cell) (20) .
Remove the Plate (Load Cell) (19) .
Remove four plugs (9) from the lower end plate. Remove four O-rings from the four plugs.
Illustration 4 g00712417
190-8386 Shim
Remove four plugs (9) from the bottom of the flywheel housing.
Install four 190-8386 Shims. Install one tool in each hole. The holes are located in the lower end plate.Note: Refer to illustration 4 for the correct placement of the 190-8386 Shims .The shims prevent the rotor from setting down on the hall effect sensors.
Loosen eight screws. Use quarter turns. Use a star pattern. Loosen the screws until the rotor rests on the 190-8386 Shim . When the rotor is setting on 190-8386 Shim, remove eight screws.
Install a 191-5217 Guide Pin in one of the eight bolt holes that are located in the bearing cartridge. This will prevent the bearing cartridge from turning.Note: The location for the connector for the cable (thermistor) must be maintained when the bearing is reinstalled.
Illustration 5 g00852427