TM-5-5420-202-20-1

M60A1 CHASSIS, TRANSPORTING; FOR BRIDGE, ARMORED-VEHICLE-LAUNCHED; SCISSORING TYPE, CLASS 60

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL; VOLUME 1 OF 4

OCTOBER 1985

TM-5-5420-202-20-1 - Page 631 of 1020

4-414.10

Change 6

TM 5-5420-202-20-1

DETAILED TROUBLESHOOTING PROCEDURE

VEHICLE OPERATION – HULL POWER

(Continued)

Symptom-31.1

First Technician (Commander’s Station)

•

Connect red probe of meter to pin B on

bulkhead disconnect harness 12326539 and

black probe to ground.

•

Check if meter indicates infinite resistance.

Check for shorted diodes in alternator.

Does meter indicate infinite resistance?

14

NO

YES

•

Replace alternator (page 10-1).

•

Connect front accessory harness

12326539 connector (CKT 2) to

bulkhead disconnect (page 10-

269).

•

Disconnect “T” harness from

harness 12326542 connector (1,

1A, 532, 533, 534)

.

•

Connect harness 12326542

connector (1, 1A, 532, 533, 534) to

voltage regulator.

•

Replace commander’s floor plate

(page 17-9).

Prior to performing a resistance check of the

generator,

discharge

the

radio

interference

suppressor. Use an insulated piece of wire, place

one end on pin F and ground the other end of the

wire to the vehicle chassis. This procedure may have

to be repeated several times to completely drain the

suppressor. When no voltage is indicated between

pin F and ground, then it is safe to perform the

resistance check.

CAUTION

15

12326539