what size fan belt for a Perkie 4108

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Shearwater

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the one currently fitted is notched (which I'm sure is incorrect for smooth pulley wheels) and even though alternator is out as far as it will go on its arc, I can still turn the alt pulley by hand. Too slack methinks! I'd rather be able to ask for a particular size than to leave it to the retailer to sell me what he thinks will do. Thank you.
 
difficult to say unless there have been no modifications, ie pully changes, alternator changed with different size pully ,air con/fridgeunit fitted etc , from new.

crude way is to set the alternator 2/3 back on its arc (1/3 out) and put string round and mesure.

alternatly buy a belt one or two size down.

As for the notched belt if it is what I think its not a problem as the friction is on the sides of the belt not on the notches.

It is very important to get a belt with the correct "taper" sides to fit the pully as its the sides of the belt that do the work
 
hows that just got rid of offending sentence.

hope you find fanbelt to fit, most car accesory shops will sell them cheaper than the chandlers.

these engine's were very common in the early black taxis I am told.

Regards
 
All depends on alternator you have and pulleys .. for size.

Second - notched is fine and in fact if you have a pulley that tends to make belt squeal - notched often cures it. I'm told that notched has better grip.

Personally - I'd take belt of ... trot to local car shop and ask for one shorter same V etc.
 
The Perk 4108 has so many variations its almost impossible to guess a size. Someone may simply not have had access to the right length belt last time an old one was replaced.

A lot of auto supply shops have a belt measuring tool supplied by Gates, a major belt manufacturer. Just drop your belt over it, slide the two ends apart and it reads the length. Get one about 2 cm shorter which should move the alternator in about 1 cm ( depending on pulley geometry)
 
No idea what size, but track down a 'Gates Green Stripe' belt, it will outlast any and very little stretching so few if any adjustments required.

I discovered these after trying to run a 150 amp twin belt oil cooled alternator on a earth moving equipment.

No interest in the company, just a very good product.

Avagoodweekend......
 
I understand your problem.

Due to fitting a new 110 amp alternator I spent weeks trying to sort this one out, getting through several car type belts that were the correct length, but not of suffcient strength. Ours is "notched" and works well on the smooth pulleys as it allows the belt to curve around the pulleys without distortion.

We ended up going to a specialist fan belt supplier in the end, they sorted us out with belts that were the tools for the job. Once you find them buy a few spares (and then the one you have on will last for ages).
 
Perhaps the fan belt you are replacing has its reference printed on the outside of the belt,something like Ferodo 1030 or 1026,which is the size (circumference )in mm. Fenners also size their belts similarly. If very old the ref may have been erased or dirtied. Halfords have a cross reference/conversion list for most makers.
 
[ QUOTE ]
The Perk 4108 has so many variations its almost impossible to guess a size. Someone may simply not have had access to the right length belt last time an old one was replaced.

A lot of auto supply shops have a belt measuring tool supplied by Gates, a major belt manufacturer. Just drop your belt over it, slide the two ends apart and it reads the length. Get one about 2 cm shorter which should move the alternator in about 1 cm ( depending on pulley geometry)

[/ QUOTE ]

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