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AC confusion

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05-09-2003 08:55:16

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I recently moved into a new house that had an old AC belly lawnmower in the garage. It starts and runs, but I've got some questions about it. I had originally thought that it looked like a C (narrow front end, plywood seat) and went to NAPA and picked up a filter for a C. When I got home with the filter, the number was different then what was already on the tractor. When I cross referenced the old filter number at NAPA, I was informed that the filter went on a B. So now I'm confused. Did they make a B series with a narrow front end? Could there have been some confusion with the oil filter? I believe the serial number is #37708, but is that the number for a B or a C? Does anyone have any advice?


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Wiley Murph

05-12-2003 19:44:34

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 Re: AC confusion in reply to Adam, 05-09-2003 08:55:16  
I know about confusion on B's & C's. I bought a B with a replacement C transmission. That is where the serial number is stamped So I don't know exactly what year it is. It has the wishbone front end and the narrower rear end, so I deduced that it was a B with a C transmission. Get a parts book for the B/C (one manual covers both models), a good many of the parts are interchangeable. One way I was told to check was by the steering arm coming out of the steering gear. If it points up it is probably a C, if it points down it is probably a B. Hope this helps and doesn't add to the confusion.

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David Bacon

05-09-2003 17:14:02

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 Re: AC confusion in reply to Adam, 05-09-2003 08:55:16  
I know of two different AC B / C 's that had switched the front ends. As I recall they were switched just behind the engine, but It has been quite a few years. I know a guy that has both versions, but has move way out East. If I recall correctly he switched because he wanted his belly mower with a narrow front end for turning, and narrow rear for keeping the tires on mowed grass. Sorry thatís the best I can do for recollection. Dave NE Iowa

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05-09-2003 09:14:16

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 Re: AC confusion in reply to Adam, 05-09-2003 08:55:16  
B's and C's both have the same engine and use the same filter. Someone at NAPA was confused.

MORE IMPORTANT - There have been a lot of posts warning about using NAPA filters on your Allis. The filtering system of the B's and C's circulate about 15% of the oil through the filter back to the oil pan. Filtered oil is not sent directly to the engine like in modern engines. The oil filter must provide sufficient back pressure or too much oil is filtered and pressure is robbed from the engine lubrication path. The NAPA filters are reported to provide too little back pressure and can ruin your engine. Go to an AGCO dealer and get your filters from them.

As for identifying your tractor... if it's a B or C, you will find the tractor serial number stamped on the torque tube just ahead of the gear shifter. The serial number will start with a B or C, depending on which model you have.

Good luck. Either tractor is a good one.

BTW - there were some B's reported to have been ordered with narrow front ends. If you have one, and it's original, you have a rare tractor.

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Ron Cook

05-09-2003 21:25:29

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 Re: Re: AC confusion in reply to Tyler(WA), 05-09-2003 09:14:16  
For what it's worth, I just bought a B and it had an AGCO filter on it with very low oil pressure. I took it off and sure enough it was the "new" style. I forget the number. I bought a WIX with the stick and the pressure is back. So AGCO isn't necessarily the place to go unless you know what you are looking for.

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05-10-2003 05:24:47

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 Re: Re: Re: AC confusion in reply to Ron Cook, 05-09-2003 21:25:29  
AGCO's supplier sent them some of the new style without telling anyone at the parts department what they were doing. AGCO recalled all of those new style filters and is selling only the correct style.

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