72amp battery on a 3.5V8 poss knackered alt diodes...

scrumpyj · Mar 23, 2009

Hello all,
got questions on batterys and chargers. When not running the engine the battery voltage is 12.4v, when running the engine battery is only 14.7v.
Question is my alt is an 85amp/h daily run is 30mins morn and eve, should my battery voltage from the alt be higher than 14.4v, could the diodes be going, and i'm looking for a decent battery charger, got one of those old halfords type 7amp/h ones. i had my batt on charge for 4 days green charged light did not come on any ideas please
many thanks in advance
Scrumpy

landy 3.9v8 · Mar 23, 2009

no 14.4 is the right charge it should be putting out

ninety till i die · Mar 23, 2009

Your voltages when running and standing are fine, they're right where they should be.
Don't know a lot about chargers tho i'v always nicked my dads haha.......but theres bound to be someone on here that has an opinion on chargers.

boydy1989 · Mar 24, 2009

ignore the green light. Your battery may be on its way out, but those voltages look fine to me. Does it start OK?

Dirty Gertie · Mar 24, 2009

The voltages are fine. Battery/alty discussion fred http://www.landyzone.co.uk/lz/f10/alternator-output-voltage-43711.html

:search:

I'll have a look and see what type of charger mine is in the morning; it didn't cost much from the local auto shop and it does fine

If you feel your charging system is sluggish, it's worth cleaning and checking the alternator for worn brushes etc and tensioning the belt

scrumpyj · Mar 25, 2009

Thanks Guys i'll check the alt for wear, with ref to starting it is slightly sluggish starting but i have fitted an iso switch which is some way away from the batt, so there is a little bit more cable for electicity to travel from the batt to switch to startermotor. Old cable was about 2ft in length now the cable from batt to starter is about 5ft long so maybe as i've got a 72amp batt i need a 100amp to cope with possible voltage drop!! hmmm

any thoughts guys
many thanks in advance
regs Scrump

Sean · Mar 25, 2009

scrumpyj said:
Thanks Guys i'll check the alt for wear, with ref to starting it is slightly sluggish starting but i have fitted an iso switch which is some way away from the batt, so there is a little bit more cable for electicity to travel from the batt to switch to startermotor. Old cable was about 2ft in length now the cable from batt to starter is about 5ft long so maybe as i've got a 72amp batt i need a 100amp to cope with possible voltage drop!! hmmm any thoughts guys
many thanks in advance
regs Scrump

where did you fit the isolation switch ?

scrumpyj · Mar 25, 2009

Why you ask Sean? in cab

Sean · Mar 25, 2009

scrumpyj said:
Why you ask Sean? in cab

just wondered how you'd managed to add another 3 foot to the length, the usual place for the iso switch is on the front face on the battery box - that way you only need add about 8 inches

scrumpyj · Mar 25, 2009

Replaced old cable then went straight from batt to iso in cab to st/motor, so i can iso batt from cab not have to lift bonnet every time and lifting bonnet everytime i get was to be a pain in arse.
Scrump

scrumpyj · Mar 25, 2009

bloody hell my last responce was total garbble, been on nights
knackered

72amp battery on a 3.5V8 poss knackered alt diodes...

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