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Safety - Section 20
Page 20-4
WORKING NEAR BATTERIES
Battery Hazard Prevention
Battery electrolyte contains sulfuric acid and can
quickly burn the skin and eat holes in clothing. If elec-
trolyte comes in contact with skin, immediately flush
the area with water.
Battery acid can cause blindness if splashed into the
eyes. If acid gets into the eyes, flush them immedi-
ately with large quantities of water and see a doctor
immediately.
• If acid is accidentally ingested, drink a large
quantity of water, milk, beaten eggs or vegetable
oil. Call a doctor or poison prevention center
immediately.
• Always wear safety glasses or goggles when
working with batteries.
• Batteries generate hydrogen gas. Hydrogen gas
is very EXPLOSIVE, and is easily ignited with a
small spark or flame.
• Before working with batteries, stop the engine
and turn the key switch to the OFF position. Wait
two minutes after the engine has stopped, and if
no warning lights illuminate, then turn the battery
disconnect switches to the OFF position.
• Avoid
short-circuiting
through accidental contact with metallic objects,
such as tools, across the terminals.
the
battery
terminals
• When removing or installing a battery, positively
identify the positive (+) terminal and negative (-)
terminal and use precautions not to short circuit
between the terminals.
• This truck is equipped with a master disconnect
switch (3, Figure 20-2) on the battery ground
circuit. When disconnecting battery cables,
always move the master disconnect switch to the
OFF position (1, Figure 20-1). First, disconnect
the positive (+) battery cables, then the negative
(-) battery cables last.
NOTE: If the master disconnect switch is OFF, and a
wrench on the negative (-) terminal touches the
battery box frame, a spark will occur if any electrical
component on the truck was left in the ON position.
• When connecting battery cables, always move
the master disconnect switch (3, Figure 20-2) to
the OFF position. Then connect the negative (-)
cables first, then the positive cables (+) last.
• Tighten
battery
terminals
terminals can generate sparks and could lead to
an explosion.
• Tighten battery caps securely.
FIGURE 20-1. MASTER DISCONNECT SWITCH
1. Off
2/13 OM2049
securely.
Loose
2. On
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