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R33 Alternator

ForcedInduction

By ForcedInduction,
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ForcedInduction Rookie

ForcedInduction

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hello

My alternator is making a whistling noise, it just started in the last week. The noise gets louder if i have more accessories switched on eg. lights, fan, rear demister.

Can the brushes in these alternators be replaced?

Could it just be a loose drive belt on the alternator?

should i just get a new one? if so how much do they cost?

Cheers

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Nigel Nichols Explorer

Nigel Nichols

Posted
Posted
hello

My alternator is making a whistling noise, it just started in the last week. The noise gets louder if i have more accessories switched on eg. lights, fan, rear demister.

Can the brushes in these alternators be replaced?

Could it just be a loose drive belt on the alternator?

should i just get a new one? if so how much do they cost?

Cheers

The whistling could be the belt slipping. Undo the lock-block bolt and turn the tensioner bolt a couple of turns. See if that helps.

Maybe also the bearings are done with life. They can be replaced. Brushes shouldn't make it whistle and yes they can be replaced.

I rebuild them for fun so heres some info

http://www4.wave.co.nz/~lakewood/Skyline/Alt.htm

Yours can be serviced.

Nigel

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ForcedInduction Rookie

ForcedInduction

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Posted (edited)
The whistling could be the belt slipping. Undo the lock-block bolt and turn the tensioner bolt a couple of turns. See if that helps.

Maybe also the bearings are done with life. They can be replaced. Brushes shouldn't make it whistle and yes they can be replaced.

I rebuild them for fun so heres some info

http://www4.wave.co.nz/~lakewood/Skyline/Alt.htm

Yours can be serviced.

Nigel

I tightened the belt and it appears to have helped a bit. Still sounds a bit funny tho i rekin i might give servicing it a shot. will i need a press to change the bearings?

I had a look at the alternator it is a Mitsibushi 23100 70T17 90A do you know the part numbers for bearings and brushes?

Thanks

Edited by ForcedInduction
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Nigel Nichols Explorer

Nigel Nichols

Posted
Posted
I tightened the belt and it appears to have helped a bit. Still sounds a bit funny tho i rekin i might give servicing it a shot. will i need a press to change the bearings?

I had a look at the alternator it is a Mitsibushi 23100 70T17 90A do you know the part numbers for bearings and brushes?

Thanks

Ah sorry not had the 23100-70T17 apart. Mostly I rebuild the Hitachi units. The small rear bearing is the most difficult to get off. I grind the outer bearing ring to allow all the balls to drop out and the outer ring falls off then just use a linish belt to grind away the inner ball race until it loosens and slides off. There is not much room to get a puller around it. By all accounts the front bearing is a slide fit both on the shaft and in the end cover.

Just note the bearing numbers beofre you remove them, any bearing dealer handles them, not just sparkies.

Nigel

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