Yale 524150797, Maintenance Manual

Page: 45 / 382

Table 2. BATTERY TROUBLESHOOTING GUIDE (Continued)
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1 MORE THAN 100MA LESS THAN 100MA
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————
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POSSIBLE SHORTED
CONDITION. WASHING OF
BATTERY MAY BE
REQUIRED
BATTERY IS NOT LEAKING
EXCESSIVELY OR
SHORTED. WILL NOT
LIKELY AFFECT SCR
CIRCUIT OPERATION
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INCORRECT
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CORRECTED
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3
SPECIFIC GRAVITY
TEST
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BATTERY SHORTED
CONDITION
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——→
USING A HYDROMETER, CHECK
SPECIFIC GRAVITY BETWEEN BATTERY
CELLS. NO MORE THAN FIVE TO TEN
POINTS DIFFERENCE. (FULLY
CHARGED)
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CORRECTED
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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.
REPLACE BATTERY AND
CONTACT BATTERY
VENDOR
———
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BATTERY IS IN GOOD CONDITION
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INCORRECT
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↓
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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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INCORRECT
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4
BATTERY LOAD TEST
←———————————
BATTERY IS
IN GOOD
CONDITION
REPLACE
BATTERY
AND
CONTACT
VENDOR
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PLACE AMP SHUNT METER IN SERIES
WITH EITHER THE POS. OR NEG.
BATTERY TERMINAL
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CYCLE THROUGH THE HOIST LIFTING
CIRCUIT SEVERAL TIMES TO REMOVE
BATTERY SURFACE CHARGE
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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)
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—
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CHECK FOR LESS THAN .05 VOLTAGE
DIFFERENCE BETWEEN EACH CELL. A
20 AMP LOAD MUST BE MAINTAINED
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2240 YRM 0001 Troubleshooting
19