Section XII. ELECTRICAL SYSTEM
Organizational Maintenance Procedures.
For Crane Units with Engine Model 687C-18-
This section will outline and illustrate organizational
ES. This 24 volt electrical system consists of two 12
maintenance procedures authorized by the Maintenance
volt batteries connected in series, a belt driven battery-
lights, generator voltage regulator, trouble light, oil
pressure transmitter, water temperature transmitter, low
oil pressure switch, water high temperature switch, and
Removal and Installation.
ammeter. An over speed governor driven through
and 2, and remove batteries.
injection pump through a micro-switch controlled circuit
(2) Install in reverse order.
when engine overspeeds the predetermined limit. The
cranes are also equipped with a horn and floodlight.
Cleaning, Inspection, and Repair.
See wiring schematic diagram (view A of fig. 1-9).
(1) Clean batteries with an approved
For Crane Units with Engine Model D333TA.
cleaning solution and dry thoroughly. Remove all
This unit is equipped with battery-charging alternator
corrosion from battery cables and terminal posts.
(2) Visually inspect battery cases and vent
generator voltage regulator. It is not equipped with the
caps for cracks, or terminals for looseness. Use a
micro-switch overspeed governor shutdown circuit, but
hydrometer and test electrolyte for specific gravity.
has a low fuel pressure switch mounted on clean side of
Charge, or replace a battery reading less than 1.250 on
fuel filter that is normally open to prevent electrical
current from flowing back to the alternator when engine
(3) Repair by replacing defective cables or
is stopped, and cause damage to rectifiers in alternator
or transistors in regulator.
See wiring schematic
REMOVE THREE WING NUTS, REMOVE COVER (NOT SHOWN).
THEN REMOVE GROUND
REMOVE JUMPER CABLE, POSITIVE CABLE, THREE CLAMPS, THEN REMOVE TWO
REMOVE FOUR CAPSCREW, LOCKWASHER AND NUT FROM END BRACKET, THEN REMOVE
BATTERY BOX FROM CAB FLOOR.
Figure 3-57. Battery and Battery Box, removal and installation.