GEAR AS-CRANKSHAFT 4905448 - Caterpillar

Assembly Procedure
Note: Before assembly, clean all parts in cleaning fluid. Allow the parts to air dry. DO NOT dry the parts with wiping cloths or with rags. Cloths and rags contain lint. Inspect all parts. Replace worn parts and replace damaged parts.
Illustration 1 g00825148
Install ball bearing (28) into the front frame. The installation of this component requires force.
Illustration 2 g00825149
Install retainer (27). Install three bolts (26) .
Illustration 3 g00825154
Install spacer (25) onto the rotor.
Illustration 4 g00825155
Install rotor (24) onto the front frame. The installation of this component requires force.
Illustration 5 g00825156
Install stator (23) onto the front frame. Align the mark on the stator to the mark on the front frame.
Illustration 6 g00825158
Install roller bearing (22) into the rear frame. The installation of this component requires force. Apply grease to the roller bearing, if necessary.
Illustration 7 g00825168
Install field coil (21) onto the rear frame. The leads must fit through the rear frame. Install three bolts (20) .
Illustration 8 g00825170
Attach rear frame (18) to front frame (19). Align the mark on the rear frame to the mark on the front frame. The stator leads must pass through the appropriate openings. Install four bolts (17) .
Illustration 9 g00825173
Install rectifier (16). Install five bolts (14). Connect the stator leads to the rectifier and install four bolts (10). Tighten "B+" terminal (9) to the following torque: 18.2 2.4 N m (13.4 1.8 lb ft)
Install "R" terminal (12). Install grommet (11). Install bolt (13) .
Install "B-" terminal (15). Tighten the "B-" bolt to the following torque: 4.4 1 N m (39 9 lb in)
Illustration 10 g00825175
Install regulator (8). Install the three bolts (7). Connect the field winding leads to the regulator. Install two bolts (6) .Note: The regulator terminal that is closest to the "B+" terminal goes on top of the rectifier terminal. The regulator terminal that is farthest from the "B+" terminal goes underneath the rectifier terminal.
Illustration 11 g00825176
Install the rear cover. Install three bolts (5) .
Illustration 12 g00825178
Install spacer (4), fan (3), washer (1), and pulley nut (2) to the rotor shaft. Tighten the pulley nut to the following torque: 127 10 N m (94 7 lb ft)
Restore the residual magnetism in the alternator. Refer to Testing and Adjusting, "Residual Magnetism - Restore".End By: Install the alternator on the machine. Refer to Disassembly and Assembly, "Alternator - Install" for the machine that is being serviced.