on each occurrence to remain within the restrictions,
topping off at a 1 ampere rate. To fully charge, top off until
each cell has less than a 25 point variation and an average
measured in three readings spaced at hour intervals.
Batteries produce explosive gases. Keep
Installation of Battery.
sparks, flame, and smoking material away.
Ventilate when charging or using in an
(1) Position batteries on engine frame with
positive' posts closest to the engine. Place battery
The batteries contain sulfuric acid that
holddown assemblies securely on battery.
causes severe burns. If acid contacts eyes,
skin, or clothing, flush well with water. For
contact with eyes, get immediate medical
Batteries to be connected in parallel only.
(2) Position and secure the clamp of the positive
battery cable (48-inch long) on the positive battery post. If
cable has been completely removed, secure the other end
Always disconnect negative cables first.
of cable to the buss bar (fig. 4-27) with a bolt, washer, and
nut. Replace buss bar cover.
(1) Remove batteries from vehicle when
necessary to charge in accordance with TM 9-6140-
(3) Position and secure the clamp of the negative
battery cable on the negative battery post. If cable has
been completely removed, secure the other end of cable to
(2) If dry batteries are used and vehicle is not
engine frame (ground) with capscrew and nut.
placed in immediate service, slow charge with charger at
(4) Position battery cover on battery holddowns
not more than 10 amperes. Charge until cells gas freely or
until electrolyte exceeds 120 `F. Reduce charge rate by
Section IX. MAINTENANCE OF ENGINE CONTROL PANEL
Switches, Gages, and Indicator Light
filter/separator indicates no trouble and the instrument is
suspected of being defective, replace it with a new
instrument, known to be good, if available. Other tests can
be made as follows:
When troubleshooting an electrical mal-
function or performing electrical mainte-
nance, ALWAYS disconnect intervehicular
(2) Visually check instruments for broken glass,
electrical cable from semitrailer, and nega-
damaged terminals, corrosion, and damage to cases and
tive battery cables at batteries. Failure to
capillary tubes. Check wiring for broken or damaged
follow this warning may create a spark and
insulation and for broken wires. Check couplings and lines
explosion, resulting in serious injury or
to pump, filter/separator, and fuel and oil gages for
death to personnel.
looseness and damage.
Check for fuel leaks at gage tube
(3) Check conduit at back of panel for kinks or
connections before performing electrical
breaks. Check conduit fittings for tightness. Make sure
testing at control panel. Stop any leaks and
decals are in place, clean, and readable. Check that all
wipe up spills.
switches are tight and no fasteners are missing or loose.
a. Testing Instruments, Switches, and Indicator Light.
b. Replacement of Switches, Instruments, and Indicator
When an instrument shows an abnormal indication, the
to figure 2-9
trouble should be checked immediately and either
4-40, and 4-41, and engine control panel electrical
corrected or referred to proper authority to make the
necessary correction. If operation of the engine, pump, or