Yale 524150797 Maintenance Manual page 45

2240 YRM 0001
TO LOCATE PROBLEM CELL OR CELLS,
POS./NEG. SIDE, CHECK FOR VOLTAGE
FROM POS/NEG TERMINALS TO
BATTERY FRAME USING THE VOLT-OHM
METER. DIVIDING THAT VOLTAGE BY 2
WILL HELP INDICATE WHAT CELL IS
SHORTED.
Table 2. BATTERY TROUBLESHOOTING GUIDE (Continued)
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↓
1
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↓
4
BATTERY LOAD TEST
—
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↓
MORE THAN 100MA
————
POSSIBLE SHORTED
|
CONDITION. WASHING OF
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BATTERY MAY BE
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REQUIRED
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↓
INCORRECT
CORRECTED
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↓
BATTERY SHORTED
CONDITION
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↓
———
REPLACE BATTERY AND
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CONTACT BATTERY
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VENDOR
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↓
←———————————
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↓
PLACE AMP SHUNT METER IN SERIES
WITH EITHER THE POS. OR NEG.
BATTERY TERMINAL
|
↓
CYCLE THROUGH THE HOIST LIFTING
CIRCUIT SEVERAL TIMES TO REMOVE
BATTERY SURFACE CHARGE
|
↓
WITH MAST IN THE LOWER POSITION,
POWER STEERING MOTOR RUNNING,
CHECK VOLTAGE DROP ACROSS EACH
BATTERY CELL USING A VOLT-OHM
METER (2.5 VOLT SCALE)
|
↓
CHECK FOR LESS THAN .05 VOLTAGE
DIFFERENCE BETWEEN EACH CELL. A
20 AMP LOAD MUST BE MAINTAINED
Troubleshooting
|
↓
LESS THAN 100MA
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↓
BATTERY IS NOT LEAKING
EXCESSIVELY OR
SHORTED. WILL NOT
LIKELY AFFECT SCR
CIRCUIT OPERATION
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3
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SPECIFIC GRAVITY
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USING A HYDROMETER, CHECK
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SPECIFIC GRAVITY BETWEEN BATTERY
——→ CELLS. NO MORE THAN FIVE TO TEN
POINTS DIFFERENCE. (FULLY
CHARGED)
|
CORRECTED
↓
BATTERY IS IN GOOD CONDITION
ADD 1,400 ELECTROLYTE TO RAISE OR
DISTILLED WATER TO LOWER.
RECHARGE FOR 1 1/2 HOURS TO MIX
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CORRECTED
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↓
BATTERY IS
IN GOOD
CONDITION
—
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↓
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↓
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↓
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↓
TEST
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↓
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INCORRECT
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↓
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INCORRECT
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↓
REPLACE
BATTERY
AND
CONTACT
VENDOR
19