3.5.
BATTERY VOLTAGE/CHARGE LEVEL
3.5.1.
If the load test result indicates a battery fault allow battery to stabilise for a few minutes and then read the open circuit voltage - meter
reading with load switch ‘Off’.
3.5.2.
Compare the reading with the Voltage/Charge table below to get an estimation of the charge level.
3.5.3.
The battery is considered charged at 75% or more. If it failed the load test with this charge it should be replaced. If the voltage indicates a
charge level below 75% then charge the battery and load test again. If battery fails this second test replace it.
3.6.
CHARGING SYSTEM (12 VOLT)
3.6.1.
Start engine and allow to reach normal operating temperature. Switch off all accessories.
3.6.2.
Run engine at 1200 to 1500rpm and note meter reading, which should be in the green ‘OK’
12 Volt
sector (fig.1).
DO NOT
press the load
switch.
3.6.3.
Switch on head lights and heater fan (highest speed), meter reading should remain in the green ‘OK’ sector.
3.6.4.
A reading in the red sector above “CHARGING SYSTEM” (fig.1) indicates a fault in the charging system which will cause the battery to be
under charged. A reading in the red sector to the right (fig.1) indicates a fault which will cause the battery to be over charged.
NOTE:
Although not marked on the meter scale the ‘OK’ range for a
6 volt
charging system is 6.8 to 7.5 volts.
3.7.
STARTER MOTOR (12 VOLT)
NOTE:
This test requires that the battery is in good condition and is charged to at least 75% capacity.
3.7.1.
Disable ignition system; remove the fuse or similar so that engine will not start.
3.7.2.
Carry out a load test (section 3.3.), if not already done and note voltage reading.
3.7.3.
Use the table given below or fig.1 to determine the equivalent minimum cranking voltage. Note that for engines of less than 3.25
litres take the next higher figure. For example:-
a) 3.5 litre engine - load test result 11.0 volts, gives min. cranking voltage of 9.7 volts.
b) 1.5 litre engine - load test result 11.0 volts, gives min. cranking voltage of 10.2 volts
Table:-
Load voltage
10.2
10.4
10.6
10.8
11.0
11.2
11.4
Min. cranking voltage
7.7
8.2
8.7
9.2
9.7
10.2
10.6
3.7.4.
Operate the starter motor and note the voltage during cranking.
3.7.5.
A reading below the minimum cranking voltage indicates that the starter motor is taking excessive current. This may be due to poor
connections, to a faulty motor or to the battery being too small for vehicle.
3.7.6.
After test reinstate ignition system.
NOTE:
For a 6 volt system test as above and note load test voltage. Double this value and determine equivalent minimum cranking voltage
as in stage 3.7.3. Halve the figure to give minimum cranking voltage for the
6 volt
system and then proceed from stage 3.7.4.
Open Circuit Voltage
Charge %
12 volt/6 volt battery
11.7/5.8 or lower
0
12.0/6.0
25
12.2/6.1
50
12.4/6.2
75
12.6/6.3 or higher
100
Sealey Group, Kempson Way, Suffolk Business Park, Bury St Edmunds, Suffolk. IP32 7AR
01284 757500
01284 703534
www.sealey.co.uk
ENVIRONMENT PROTECTION
Recycle unwanted materials instead of disposing of them as waste. All tools, accessories and packaging should be sorted, taken to
a recycling centre and disposed of in a manner which is compatible with the environment. When the product becomes completely
unserviceable and requires disposal, drain any fluids (if applicable) into approved containers and dispose of the product and fluids
according to local regulations.
WEEE REGULATIONS
Dispose of this product at the end of its working life in compliance with the EU Directive on Waste Electrical and Electronic Equipment
(WEEE). When the product is no longer required, it must be disposed of in an environmentally protective way. Contact your local solid
waste authority for recycling information.
Note
: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior
notice. Please note that other versions of this product are available. If you require documentation for alternative versions, please email or call
our technical team on [email protected] or 01284 757505.
Important
: No Liability is accepted for incorrect use of this product.
Warranty
: Guarantee is 12 months from purchase date, proof of which is required for any claim.
B
T91/7.V4 Issue 1 20/08/2020
Original Language Version
© Jack Sealey Limited
