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Farmall & IHC Tractors Discussion Forum
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SH C164 Gear Train and Front Cover

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Gauger

01-10-2007 13:20:24




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Guy Fay's Letter Series Farmall book describes a beefed up intermediate gear and front cover for Stage II engines due to the hydraulic pump being driven by the distributor drive. I have recently disassembled an early '53 Stage I and a '54 Stage II and these parts are the same. The SH parts manual also makes no mention of different versions of these parts. Typically there will be a notation in the parts manual for parts that changed between Stages I and II. I also checked the cam gears and ditributor drive gears and they are the same. Anyone have more information on this??

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CNKS

01-10-2007 19:49:04




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 Re: SH C164 Gear Train and Front Cover in reply to Gauger, 01-10-2007 13:20:24  
I have never thought about it before now, but IH must have used serial breaks only for parts that were redesigned. I have not had the cam gear out of my H or Stage 2 Super H, but the latest version of the parts book shows exactly the same number for both, both with the DB prefix. In other words the only gears available new (if indeed they still are) are the latest gears. The front covers, however, had the whole number changed from the D designation to the newer R designation on the H, not the Super H, at SN 344864, thus the covers on the late H and the Stage 1 and 2 Super H's are the same. The cam gear did not have to be changed at that time, but apparantly the Stage 2 SH was planned even before the original SH came out. When only the suffix changes, that part will replace an older part. If the whole number changes, that part may or may not replace the older part, if it does not then there should be a serial break, provided the number was changed during production. Clear as mud.

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D Slater

01-10-2007 15:55:52




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 Re: SH C164 Gear Train and Front Cover in reply to Gauger, 01-10-2007 13:20:24  
Sounds like you have the parts that came in the engines. If you can see the numbers on the camshaft gear hubs, I think you will find the number ends with DA. Thats a step up from some H that ended in D. Teeth are same size on gears but think you will find the DA a little thicker between gear and hub than D. Best one is supose to be DB used in 300 and 350. Some early 300 may have DA.



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chuck46

01-10-2007 15:33:16




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 Re: SH C164 Gear Train and Front Cover in reply to Gauger, 01-10-2007 13:20:24  
Hi, I have never understood where the miss information has come from, but all the timing gears from the first H through the last 350 are the same. I put a live pump on my 41 H more than 30 years ago, after all these years of very hard use the gears are still going. At that time my Imp. parts man told me they were and by now I assume he was right. Good luck, Chuck



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D Slater

01-10-2007 19:15:36




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 Re: SH C164 Gear Train and Front Cover in reply to chuck46, 01-10-2007 15:33:16  
Chuck I agree with you on the part about the weekness of gears on H and M being overblown. Sure some have failed but a lot more are still running on 50+ year old tractors.



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