operators_manual

WARNING
Battery cables and air/electrical har-
nesses are mounted to the bottom of
the floor. Do not drill or screw into floor
pan without first checking the location
of the cables, harnesses or any other
component that might be damaged.
Damaging any component could result
in electrical shock which could cause
personal injury and/or loss of a critical
truck system. Failure to comply may
result in death, personal injury, equip-
ment or property damage.
WARNING
Electrical damage or battery explosion
can occur when improperly charging
batteries. Failure to comply may result
in death, personal injury, equipment or
property damage.
WARNING
Batteries release gases that are flam-
mable. Batteries are equipped with
vent tubes and flash arrestors which
vent battery gases out of the cab. En-
sure all vent tubes, flash arrestors and
grommets are properly installed and
ensure they are clear and functioning
properly. Failure to reinstall or keep
the vent tubes and grommets clear or
ensure the flash arrestor(s) are func-
tioning properly could result in death,
personal injury, equipment or property
damage.
CAUTION
DO NOT store other items in the bat-
tery box. Failure to comply could result
in damage to the truck and/or batter-
ies.
CAUTION
Properly secure battery tie downs and
battery box cover when reinstalling
batteries after service. DO NOT over
tighten. Over tightening can crack the
battery case which can lead to equip-
ment damage.
CAUTION
The Diesel Exhaust Fluid (DEF) sys-
tem purges to prevent damage from
freezing. If your vehicle is equipped
with battery disconnect switches, DO
NOT disconnect battery power within
two minutes of switching the ignition
key off. Failure to comply may result in
vehicle or property damage.
Here are some common causes of battery
failure:
Overcharge: this condition results from
improper voltage regulator adjustment. It
results in overheating of the battery,
warped plates, and evaporation of
electrolyte.
Undercharge: the voltage regulator is
malfunctioning, the drive belt is slipping, or
your vehicle has undergone long periods of
standing idle or short distance driving.
These conditions result in battery plates
becoming covered with a hard coating.
Vibration: loose battery hold-downs may
cause battery plate failure.
Short Circuits: these discharge the battery
by draining electricity.
MAINTENANCE - Electrical System
232 Y53-6047-2HEN (03/18)
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