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Farmall & IHC Tractors Discussion Forum
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m or 400

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adam jones

08-18-2006 03:06:38




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i have a 48 farmall m and was wondering if a 400 motor would fit and what would i have to do to get it to fit




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Dave Slater

08-18-2006 06:00:48




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 Re: m or 400 in reply to adam jones , 08-18-2006 03:06:38  
Just a few things if you have a complete farmall 400 engine. Crankcase vent pipe comes out top of valve cover on 400 and back of head on M. You can use suitable rubber hose to modify that. Governor throttle lever arm will be different.Take lever out of M and install in 400 or put M governor complete on 400 engine. 48 M has a 11 inch clutch,if thats what you use put the M flywheel on 400. If you use the 400 flywheel it takes a 12 inch clutch set up like SM or late M. 400 clutch plate is wrong splines. If you use stock 48 belly pump you have to use 11 inch clutch because they changed front case on late M and SM to clear 12 inch. Distributor drive that bolts to front cover on 400 is different bolt pattern than 48 M. If your going to use one and not the hydraulic pump find one with a 6 digit # ending in RI from SM or some 1950 M and newer.

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Dcik Davis

08-18-2006 07:08:16




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 Re: m or 400 in reply to Dave Slater, 08-18-2006 06:00:48  
Nice answer Dave. Sounds like you've been down this road before? My nickel Dick Davis



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City-Boy McCoy

08-18-2006 19:42:10




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 Re: m or 400 in reply to Dcik Davis, 08-18-2006 07:08:16  
D'cik:
Are you a cajun?



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El Toro

08-18-2006 05:53:33




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 Re: m or 400 in reply to adam jones , 08-18-2006 03:06:38  
You can resleeve the M block to 264cid with an overbore kit. No machining required. Hal



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bm3501466

08-18-2006 04:46:49




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 Re: m or 400 in reply to adam jones , 08-18-2006 03:06:38  
You need nothing. The 400 and 450 motors are based off of the m motor. They will swap in and out without any modifications.



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