TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 143 of 801

TM 9-2320-273-34

TA 074014

Figure 5-16. Drive End Housing Bearing Removal.

5-4.

Tests and Inspections.

NOTE

Before performing the following tests,

visually inspect all parts for wear, cracks,

breakage, or other mechanical defects.

Discard and replace any damaged part.

a. Positive Heatsink (Rectifier) Test.

NOTE

The positive heatsink is the one to which

the positive output terminal is connected.

The square hole in the terminal end of the

positive heatsink is larger than the ter-

minal hole in the negative heatsink. This

test may be performed without removing

the heatsink from the end housing by

performing steps (1) thru (4) prior to

testing the diodes. If the heatsink has

been removed, proceed to step (5).

(1)

Remove the stator.

(2)

Disconnect the red and black leads to the regulator and make sure they are not touching

each other.

(3)

Remove the diode trio from the ac terminal studs.

(4)

Disconnect the capacitor across the lower end of the heatsinks.

(5)

Connect the positive lead of an ohmmeter or a test light to the positive heatsink and touch

the negative test lead to each of the three diode terminals, one at a time (fig. 5-17). A high resistance

should be indicated, or if a test light is used, it should not light. If any of the three diodes show a low

resistance, or the test lamp lights, the diode is shorted and the entire heatsink must be replaced.

5-15