JET AS-PISTON COOLING 7W4990 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     191-5217     Guide Pin     1    
B     190-8385     Bearing Puller Gp     1    
Illustration 1 g00730858
(1) Screw (2) Commutation Sensor Assembly (3) O-ring (4) Bolt (5) Commutation Sensor Wheel (6) Spacer (7) Screw (8) Plate for the Commutation Sensor Port (9) Plug and O-ring (10) O-ring (11) Rotor Retainer (12) Polished Rotor Retainer Bolt (13) O-ring (14) Rotor Static Discharge Drain (15) Screw (18) Screw (19) Hole
Illustration 2 g00700951
Serial terminal "J1"
Connect a PC to the RS-232/RS-485 port. The port is located on the bottom back corner of the system's I/O board.
Click on "Enter Password" menu option in order to view the "Enter User Name / Password" dialog box.
Illustration 3 g00697157
The "Enter User Name / Password" dialog box
Enter a valid "User Name" and then enter a valid "Password".After the password has been entered, the menu options will change. The menu bar will contain a "Calibrate" option.
Depress the "" keys and hold the "" keys.The system will enter the "MANUAL" mode.
Depress the "" keys and hold the "" keys. This is done in order to bring the system to zero RPM.
The system will prompt you to confirm the option. Depress the "" key.A minimum of 15 minutes is required to secure the rotor.Note: This procedure is only available once during a 24 hour period.
Ensure that the flywheel is at zero rpm.
Isolate the system from the load by closing the bypass circuit breakers.
Open the circuit breaker for the output of the system.
Open the AC circuit breaker for the input of the system.
Allow the capacitor banks to bleed down for approximately 5 minutes.Note: When the flywheel is spinning, the following components are energized: the bus, the armature leads and the fuses. Accomplish the procedure as quickly as possible. During the procedure, the rotor is spinning on the bottom bearing.
Illustration 4 g00689031
(17) Vacuum Hose
Remove vacuum hose (17) from the system. This relieves the vacuum from the system.
Disconnect the yellow connector for the thermistor and the 19 pin instrument connector.
Illustration 5 g00702286
(1) Screw (2) Commutation Sensor Assembly (3) O-ring (4) Bolt (5) Commutation Sensor Wheel (6) Spacer (7) Screw (8) Plate for the Commutation Sensor Port (9) Plug and O-ring (10) O-ring
Remove three screws (1) .
Remove commutation sensor assembly (2) .
Remove O-ring (3) .
Remove bolt (4) .
Remove commutation sensor wheel (5) .
Remove spacer (6) .
Illustration 6 g00702346
Points for the Measurements (19) Hole
Use three feeler gauges. Measure the gap that is between the bearing cartridge and the end plate. Take measurements at three locations. The measurements will be used during the installation of the new bearing. Record the results in the following table.
Table 2
Location    Measurement    
1        
2        
3        
Loosen eight screws (18). Use quarter turns. Use a star pattern.
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.
Illustration 7 g00702558
190-8385 Bearing