TM-9-2330-356-14

SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1990

TM-9-2330-356-14 - Page 186 of 528

TM 9-2330-356-14

4-17. Circuit Breaker

WARNING

When troubleshooting an electrical malfunc-

tion or performing electrical maintenance,

ALWAYS disconnect intervehicular electrical

cable from semitrailer, and negative battery

cables at batteries. Failure to follow this warn-

ing may create a spark and explosion, result-

ing in serious injury or death to personnel.

a.

Removal.

(1) Disconnect negative battery cable from

battery (fig. 4-37).

(2) Loosen engine junction box clamp screws and

open cover.

(3) Disconnect all leads from preheater solenoid

and circuit breaker (fig. 4-30).

(4) Disconnect lead No. 54 (fig. 4-30) that goes

to fuel pumps from terminal strip.

(5) Loosen three cable connectors (fig. 4-30) on

side of junction box.

(6) Pull the two large leads through the

connectors until they are almost removed from the

junction box.

(7) Remove four screws (6, fig. 4-31) and

washers (7) that secure mounting plate to control panel.

(8) Tilt mounting plate (8) for access to circuit

breaker mounting screws (13).

(9) Remove the two screws (13) and circuit

breaker (12).

b.

Installation.

(1) Install circuit breaker to plate with two screws

(13, fig. 4-31).

(2) Fasten mounting plate to control panel with

four screws (6) and washers (7). Ground lead is to be

installed with upper left screw.

TA502346

Figure 4-30. Location of Circuit Breaker and Preheater Solenoid in Junction Box.

4-50