Figure 4-30. Alternator output and system test setup.

Figure 4-30. Alternator output and system test setup.

could damage the alternator, voltage regulator, or other parts.

a. Removal.

(1) Loosen the adjusting screw (1, fig. 4-31) and push the alternator toward the engine to loosen the fan belt.

Disengage the fan belt from the alternator drive pulley.

(2) Disconnect the electrical leads from the alternator. Tag leads to facilitate reassembly.

(3) Remove the alternator from the engine, following the sequence of index numbers 1 through 15 in figure 4-

31.

b. Alternator Brush Replacement.

(1) Remove the two assembled washer screws '(1, fig. 4-32) that secure the brush cover (2) to the

alternator; carefully pull the cover away from the alternator.

put and system test setup.

(2) Remove the two terminal screws (4), nuts (5), insulating washers (6), leads (7), washers (8), and bushings

(9) from the brush cover.

(3) Remove the two screws (10) that secure the insulator (11) and brush assembly (12) to the alternator;

remove the brush assembly with the attached electrical leads (7).

(4) Inspect the brush assembly for cracks, signs of overheating, and distortion. Check that the brushes slide

freely in the brushholders and that the brush springs provide sufficient brush tension. Inspect the brushes for cracks, oil

saturation, and wear. If brushes are worn to less than 3/16 inch, oil soaked, or cracked, replace the brush assembly.

(5) If the brush assembly passes the visual inspection, check the electrical condition of the assembly. Refer to

figure 4-33. Check that continuity exists between points A and B and between points C and D, but that no continuity exist

4-34