DAF CF65, CF75, CF85 Series . Manual — part 668
5
CF65/75/85 series
Contents
DIAGNOSTICS
1
CONTENTS
Page
Date
1.
BATTERIES
1-1
200315
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1.1
Fault-finding table
1-1
200315
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1.2
Service life
1-4
200315
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2.
ALTERNATOR
2-1
200315
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2.1
Fault-finding table
2-1
200315
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3.
FAULT FINDING
3-1
200315
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3.1
Short circuits
3-2
200315
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3.2
Open circuit
3-3
200315
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3.3
Earthing problems
3-4
200315
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1
200315
5
DIAGNOSTICS
Contents
CF65/75/85 series
2
200315
1
5
CF65/75/85 series
Batteries
DIAGNOSTICS
1-1
1. BATTERIES
1.1 FAULT-FINDING TABLE
SYMPTOM: NEW BATTERY HEATS UP CONSIDERABLY DURING FILLING
Possible cause
Remedy
Inadequate formation because of storage in
unsuitable or damp conditions over a long period
Allow to cool
Charge fully
Check the relative density
SYMPTOM: BATTERY ACID LEAKING FROM THE PLUG HOLES
Possible cause
Remedy
Battery overfilled
Siphon off some of the fluid
Overcharging
Check the charger and repair if necessary
SYMPTOM: ELECTROLYTE LEVEL TOO LOW
Possible cause
Remedy
Leaking battery
Replace the battery
Excessive gas development due to charging
current being set too high
Check/repair the charger
SYMPTOM: RELATIVE DENSITY TOO LOW (
<1.240)
STARTING TROUBLE
Possible cause
Remedy
Power consumer left on by mistake
Charge the battery
Insufficient charging
Check/repair the charger
Short circuit in the charging circuit
Check the charging circuit
SYMPTOM: RELATIVE DENSITY TOO HIGH (
>1.290)
Possible cause
Remedy
Topped up with acid instead of distilled water
Siphon off some of the fluid and top up with
distilled water
If necessary, repeat this after mixing (charging)
1
200315
5
DIAGNOSTICS
Batteries
CF65/75/85 series
1-2
SYMPTOM: STARTING TROUBLE
POOR STARTING TEST RESULT
POWER FAILS UNDER LOAD
Possible cause
Remedy
Discharged battery
Charge the battery
Worn battery (plates corroded and worn away)
Replace the battery
Defective battery (‘dead cell’)
Replace the battery
Battery too small
Replace with battery of a higher capacity
Battery sulphated (plates have hardened)
Replace the battery
SYMPTOM: BURNT IN BATTERY POLES
Possible cause
Remedy
Terminals not securely fitted, or poor contact
Have the battery poles repaired, fit the terminals
properly and replace the terminals if necessary
SYMPTOM: 1 OR 2 CELLS BUBBLE EXCESSIVELY UNDER HIGH LOADS (STARTING OR
STARTING TEST)
Possible cause
Remedy
Defective cells
Replace the battery
Leaking cell partition
Replace the battery
SYMPTOM: BATTERY DISCHARGES VERY FAST (DOES NOT RETAIN POWER)
Possible cause
Remedy
Insufficient charging
Check the charging. Is the charging time (driving
time) sufficient?
Short circuit in charging circuit
Check the charging circuit
Major self discharging, for example due to
contamination
Clean the battery
Battery sulphated (on examining the plates, they
are found to be hard and, in some cases,
whitened)
Replace the battery
1
200315
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