Battery - Subaru Legacy 2003 Service Manual

STARTING/CHARGING SYSTEMS

4. Battery

A: REMOVAL
1) Remove battery cable holder (A) from battery
rod.
( A )
2) Disconnect the positive (+) cable after discon-
necting the negative (−) cable of battery.
3) Remove flange nuts from battery rods and take
off battery holder.
4) Remove battery.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
3.4 N·m (0.35 kgf-m, 2.5 ft-lb)
NOTE:
• Clean battery cable terminals and apply grease
to prevent corrosion.
• Connect the positive (+) cable of battery and then
the negative (−) cable of the battery.
C: INSPECTION
WARNING:
• Electrolyte has toxicity; be careful handling
the fluid.
• Avoid contact with skin, eyes or clothing. Es-
pecially at contact with eyes, flush with water
for 15 minutes and get prompt medical atten-
tion.
• Batteries produce explosive gases. Keep
sparks, flame, cigarettes away.
• Ventilate when charging or using in enclosed
space.
BATTERY
• For safety, in case an explosion does occur,
wear eye protection or shield your eyes when
working near any battery. Never lean over a bat-
tery.
• Do not let battery fluid contact eyes, skin,
fabrics, or paint-work because battery fluid is
corrosive acid.
• To lessen the risk of sparks, remove rings,
metal watch-bands, and other metal jewelry.
Never allow metal tools to contact the positive
battery terminal and anything connected to it
while you are at the same time in contact with
any other metallic portion of the vehicle be-
cause a short circuit will be caused.
1. EXTERNAL PARTS:
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Check for the existence of dirt or cracks on the bat-
tery case, top cover, vent plugs, and terminal posts.
If necessary, clean with water and wipe with a dry
cloth.
Apply a thin coat of grease on the terminal posts to
prevent corrosion.
2. ELECTROLYTE LEVEL:
Check the electrolyte level in each cell. If the level
is below MIN LEVEL, bring the level to MAX LEVEL
by pouring distilled water into the battery cell. Do
not fill beyond MAX LEVEL.
3. SPECIFIC GRAVITY OF ELECTROLYTE:
1) Measure specific gravity of electrolyte using a
SC-00053
hydrometer and a thermometer.
Specific gravity varies with temperature of electro-
lyte so that it must be corrected at 20°C (68°F) us-
ing the following equation:
S
20
SC(H4SO)-20
= St + 0.0007 × × × × (t − − − − 20)
S : Specific gravity corrected at electro-
20
lyte temperature of 20 ° ° ° ° C
St : Measured specific gravity
t : Measured temperature ( ° ° ° ° C)
Determine whether or not battery must be
charged, according to corrected specific
gravity.
Standard specific gravity: 1.220 — 1.290 [at
20 ° ° ° ° C (68 ° ° ° ° F)]
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
100% 75% 50%
Complete charge
Charging condition
Specific gravity and state of charge
22% 0%
(%)
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