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Hi Guys:
I’ve just had my Balmar alternator rebuilt while passing north through Myrtle Beach, SC. The alternator guy (been doin’ this for 50 years) told me I’ve had the wrong belt on the alternator pulley. He said he can tell the the belt has only been running in the bottom of the pulley groove and that it should be getting it’s drive from the sides of the pulley. I have been going through a lot of alternator belts! When I got back to Oriental,NC (home port) I took the belt to the local NAPA to see if there was a belt that was a little wider but same length. Understandably the guy told me he couldn’t go through 2000 belts to see if one was a little wider. Does anybody have good belt part numbers(Gates,NAPA, whatever ) for the long and short belt? This was the same type of belt that was on the boat when I purchased it 4 years ago and the PO left me 4 sets of the same part number belts. I guess I’ve been using the wrong belts all this time. Thanks for any help! Jack on “MOJO”Calico Jack
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Jack,
Google up “v-belt profiles”. I believe most standard v-belts from the
auto parts store would be “A” profiles. Check your pulley (pulleys).
They might be “b” profiles if an “a” belt is sitting too deeply in
them. For “b” belts, I think you will have to go to a local industrial
supply. (Grainger if you have too, but a local bearing shop probably
also stocks v-belts for a lower price).Pete
On 5/15/2012 10:40 PM, calicojack wrote:
Hi Guys:
I’ve just had my Balmar alternator rebuilt while passing north through Myrtle Beach, SC. The alternator guy (been doin’ this for 50 years) told me I’ve had the wrong belt on the alternator pulley. He said he can tell the the belt has only been running in the bottom of the pulley groove and that it should be getting it’s drive from the sides of the pulley. I have been going through a lot of alternator belts! When I got back to Oriental,NC (home port) I took the belt to the local NAPA to see if there was a belt that was a little wider but same length. Understandably the guy told me he couldn’t go through 2000 belts to see if one was a little wider. Does anybody have good belt part numbers(Gates,NAPA, whatever ) for the long and short belt? This was the same type of belt that was on the boat when I purchased it 4 years ago and the PO left me 4 sets of the same part number belts. I guess I’ve been using the wrong belts all this time. Thanks for any help! Jack on “MOJO”_______________________________________________
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Jack,
I don’t know if this will help you or not, I just had the alternators
rebuilt and the belt number that was on the Balmar was “Premium 25-10555”.
I don’t know what the profile of the belt is and my engine is a Perkins.Jack
XanaduOn Tue, May 15, 2012 at 6:26 PM, calicojack wrote:
Thanks Pete – I have the alternator off. I’ll try the industrial belt
route. Best/ Jack_______________________________________________
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The belt ID for my W58 with a Leece-Neville Alternator is 25-9440
-p
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s/v Deep Playa | Pearson 424 Hull #152 | http://www.DeepPlaya.com | @DeepPlaya | W7PEAOn Tue, May 15, 2012 at 10:19 PM, Jack P Clarke wrote:
Jack,
I don’t know if this will help you or not, I just had the alternators
rebuilt and the belt number that was on the Balmar was “Premium 25-10555”.
I don’t know what the profile of the belt is and my engine is a Perkins.Jack
XanaduOn Tue, May 15, 2012 at 6:26 PM, calicojack wrote:
Thanks Pete – I have the alternator off. I’ll try the industrial belt
route. Best/ Jack_______________________________________________
maillist mailing listhttps://pearson424.org/mailman/listinfo/maillist_pearson424.org
_______________________________________________
maillist mailing listhttps://pearson424.org/mailman/listinfo/maillist_pearson424.org
_______________________________________________
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Owners no more...
Thanks Dawn and Patrick! -
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Jack-
You might want to check out Balmar’s website for advice on belts. Probably you want a very high quality automotive belt, most likely 1/2″ wide if you have a small case Balmar. For length, either get the counter guy to measure the old belt, they should have a device for this, or run a piece of tape around the outside of the pulleys then measure it.
Quent -
I see that you’ve had several responses about belt size. When repowering, I found that there is a lot more to belts than just size.
From my repowering notes:
http://www.richardcarter.net/repower/AccessoryMount2.html“After much research, I found that belts come in two basic designs, one is designed to take a shock load and the other is designed to
wear well. The first type is thinner. It avoids damage when subjected to a shock load by slipping slightly. They usually come with ribs
on the outside to provide better cooling. They tend to wear out quicker, but rarely snap. The other flavor has a thicker construction
and slips less. These belts frequently have ribs on the inside. Since they have more surface area in contact with the sheave, they don’t
slip as easily. When subjected to a shock load, they may snap.My multi-stage regulator puts quite a load on the alternator when it switches to the fast charge setting. One of my battery banks has a
pair of large AGM batteries. This type of battery accepts a recharge rate much faster than conventional wet-cell batteries. When the
alternator kicks into high gear, it puts a shock load on the belts. I’ve had belts snap on me. When they break, they can be thrown off
the pulley with considerable force. As mentioned earlier, I broke my throttle cable that way.Balmar recommends the Green Stripe belt by Gates. This is a low-slip belt that, in my opinion, is not suited to shock loads. They also
recommend the Dayco Top-Cog V-belt. In my opinion, this will last longer and be more reliable.”Regards
Rich
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