[stag888]

Hi ,
Appreciate a bit of guidance , need a new alternator for my early 2.5 petrol , and there seem to be 2 types of 45amp available - 115-45 amp & 127-45 amp , the 115 is described as " Machine sensed" non a/c whist the 127 has no additional comments - there is a price difference , wondered what was the actual difference ? , and which should I be getting ?
Much appreciated
Cheers
Steve

 

[jamesmartin]

do you have 3 wire plug or single wires with eyelets

 

[stag888]

Single multi plug with 3 wires - 2 thinish , one thicker - Steve

 

[jamesmartin]

115 type though you can alter wiring to fit other

 

[stag888]

Hi ,
When I looked at the fitting it looked like the 115 was the right fit , but because the engine is not the original - a 2.5 in a series 3 , and the wiring has been made up, I wondered if it was actually the right type for the engine - the machine sensed bit is what confused me , The route problem is the ignition light staying on until I blip the accelerator hard . I've checked the contacts & earths - all good , so was going to change the alternator , then when I saw 2 types wondered if that could be the issue. Having read a previous thread I see that the difference in type is how they read voltage & know when to charge - Machine from the regulator , standard from the battery , the preferred option seems to be regular battery sensed , wonder if that could be the problem ? , and changing alternator & wiring could be the solution . I think I need to keep investigating before spending
Steve

 

[jamesmartin]

Hi ,
When I looked at the fitting it looked like the 115 was the right fit , but because the engine is not the original - a 2.5 in a series 3 , and the wiring has been made up, I wondered if it was actually the right type for the engine - the machine sensed bit is what confused me , The route problem is the ignition light staying on until I blip the accelerator hard . I've checked the contacts & earths - all good , so was going to change the alternator , then when I saw 2 types wondered if that could be the issue. Having read a previous thread I see that the difference in type is how they read voltage & know when to charge - Machine from the regulator , standard from the battery , the preferred option seems to be regular battery sensed , wonder if that could be the problem ? , and changing alternator & wiring could be the solution . I think I need to keep investigating before spending
Steve

the wiring is the same on all the trucks, ive never had an issue fitting any defender alt on any of the engines

 

[stag888]

Thanks ,
I'll recheck the earths & connections
Steve

 

[jamesmartin]

what out put is there if you put a multimeter on positive battery terminal and neg to car

 

[stag888]

James ,
Would need a multi meter first to find out , am still recovering from a broken leg at the moment so it could still be a few weeks before I get out under the bonnet & take your advise and really start looking into it , hence just trying to do laptop research at the moment.
Cheers
Steve

 

[jamesmartin]

it would help to know what voltage is produced

 

[nobber]

Its a 127 you need isn't it? Brown plug , 3 wires , little wire clip to hold the plug on?
Lucas 127 on mine.

Im sure the 2.5 petrol would have used a 127.

 

[zeaphod]

The A115/45 also has a plug with three wires. I've just replaced the one on my 1985 2.5NA. If you get a meter, and your current alternator is putting out enough volts, the battery may be past its best.

 

[zeaphod]

Best deal I could get was from eurocarparts. They had new pattern or reconditioned Lucas options.

 

[nobber]

I took mine to an auto electrical place in town, cost 35 quid to have it reconned.

 

[zeaphod]

from memory, I paid £38 for a pattern one. I've stripped my original for spares. It was going to be rebuilt - before I cracked the casing removing the last bearing. Bugger.