Alternator - Delco 21SI Caterpillar

Alternator - Assemble

Usage:

980C 13B

Assembly Procedure

Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause problems in the future. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.

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Table 1
Required Tools
Part Number	Part Description	Qty
1P-0510	Driver Gp	1

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Illustration 1	g00706948

Install bearing (28) into the rear frame. Use 1P-0510 Driver Gp .

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Illustration 2	g00706939

Install rectifier (24) and install screw (23). Install capacitor (27). Install screw (25) and install insulated screw (26) .

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Illustration 3	g00706922

Install regulator (20) and install screw (21). Install brush holder (18). Install screw (22) and install insulated screw (19) .

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Illustration 4	g00706931

Install B+ terminal (11) and install connector strap (15). Install nut (16). Install R terminal (12) and install connector strap (13). Install diode assembly (14) and install insulated screw (17) .

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Illustration 5	g00706884

Install stator (10) into rear frame (4). Install three nuts (9) .

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Illustration 6	g00707145

The brushes (29) must be held in the depressed position in order to install the rotor in the rear frame. Depress brushes (29). Insert a piece of wire (30) through brush holder (18). Wire must extend through the back of the rear frame (4) for removal in step 9.

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Illustration 7	g00706882

Install rotor (8) into rear frame (4) .

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Illustration 8	g00706873

Note: Do not apply force to the inner race of bearing (7). To install the bearing, apply force to the outer race.

Install bearing (7) into the drive frame. It may be necessary to use a hydraulic press to install the bearing. Install retainer (6) and install three bolts (5) .

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Illustration 9	g00706866

Position drive frame (3) over the rotor shaft. Carefully push the drive frame (3) to the rear frame (4). Align the marks on the frames that were made during disassembly. Install four bolts (2). To tighten bolts (2), refer to Specification, "Alternator" for the proper torque.

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Illustration 10	g00706834

Note: Do not install the pulley while the rotor shaft is vertical. This may cause internal damage to the alternator. Install the pulley while the rotor shaft is horizontal.

Install fan (1) onto the rotor shaft. Install the pulley. Install the washer and install the nut. To tighten the nut, refer to Specification, "Alternator" for the proper torque.