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Massey Harris GP 4WD


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  #1  
Old 09-23-2009, 11:10:46 AM
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Phil Johnson Phil Johnson is offline
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Default Massey Harris GP 4WD

I am restoring a Massey Harris GP for a friend. It is a 1936 with the Hercules OHV engine. I would like to find out the model of engine so I can order a manual. The casting numbers on the block are: GWC 26000-E Bore is 4", and stroke is 4 1/2". Anyone have any info?
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Old 09-23-2009, 05:26:43 PM
Keith R. Kuhlengel Keith R. Kuhlengel is offline
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Default Re: Massey Harris GP 4WD

I have a 1936 Massey Harris GP 4WD, 66" tread, which has a Hercules OOC engine in it. This is the same engine that is in some of the Cletracs; I obtained parts for it from Landis Zimmerman in Pennsylvania who advertises widely as a supplier of Cletrac parts.
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Old 09-23-2009, 09:31:24 PM
Ed Bezanson Ed Bezanson is offline
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Default Re: Massey Harris GP 4WD

Dear Phil I am not sure what engine the OHV engine is but that is a rare setup in the GP FWD. The majority do use the OOC engine but yours is not one of them. I have only seen the engine you describe in one MH in a collection in Clarion, Iowa. Good luck on your quest.
Ed Bezanson
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Old 09-23-2009, 10:04:44 PM
Bud Tierney Bud Tierney is offline
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Default Re: Massey Harris GP 4WD

Landis's site is olivercletrac.org; he can tell if it's a Herc.
FWIW, I checked four different catalogs (or was it five?)...all listed the GP 15-22 and the 4WDGP (Canadian) with just the Herc OOC...it is a 4x41/2, and the gasket list includes valve cover gasket...
If it does turn out to have a different engine (or, Ed, if you recall what other engine you remember) I'd appreciate an email for my records. Many thxx and good luck.
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Old 09-23-2009, 11:01:37 PM
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Default Re: Massey Harris GP 4WD

The Massey Harris GP 4WD was built from 1930 to 1936 around 2000 were built. In 1936 MH built 200 with the ohv engine. I have an early one with the standard engine and I know were there is an ohv one near me.
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Old 09-23-2009, 11:55:34 PM
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Default Re: Massey Harris GP 4WD

The OHV motor in this tractor is the same as the one illustrated in the Jensales reprint of the Parts Manual for tractors 303,001 and up. Same casting numbers on the block, but the manual doesn't indicate the make of engine. I have the Jensales reprint of the service manual and it illustrates the standard flathead engine. Pripps/ Morland's Massey Book states that the improved OHV Hercules was introduced in 1936. same bore and stroke as the flathead but produced 4 more HP.
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Old 09-24-2009, 12:05:01 AM
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Default Re: Massey Harris GP 4WD

The engine is not bad in this tractor and is complete but needs new rings, and the bearings are being repoured and machined. It was running with a severe knock!!

The biggest hurdle is the right front drive is missing the U joint assembly and pinion gear with required bearings and the brake pulley and band. I have the spline shaft and coupling jaw. Gary Biewer may have the necessary parts, I should know in a few days.
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Old 09-24-2009, 03:21:30 PM
Bud Tierney Bud Tierney is offline
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Default Re: Massey Harris GP 4WD

OOPS!! Are we getting the cart before the horse here??
Finally ran down illus of Herc OOC 4x41/2, and it's a flathead engine, not an OHV (at least per illus in Thompson manual).
That would jibe with the OOC showing in all my parts catalogs, as they're generally made from initial prod info and often omit later engine upgrades/changes.
That would mean the OHV engine put in the last few models in 1936 would be something else; if it's another Herc, it's not in that Thompson (Stock/Ind'l Engines/Gas Vol HD2, 1948) which doesn't show any other Herc 4x41/2.
Fascinating!
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Old 09-24-2009, 11:08:34 PM
Bud Tierney Bud Tierney is offline
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Default Re: Massey Harris GP 4WD

Well, you want answers, you gotta go to the source...
Posted an inquiry on Masseycollectors.com; Steve333, who has a Massey Data Book, was kind enough to advise the OHV engine is a Herc OHC...
This engine only appears in three of my parts catalogs:
1936 King Prod (rings/pistons/valves etc), which shows it as having different pistons/pins than the OOC;
1939 and 1944/45 Hastings catalogs, which list it with the OOC (these catalogs go by ring size and number of rings only);
1950 Gates catalog, which lists it as "1936-37".
It's NOT listed in a 1938 Victor, not a good sign, but these catalogs often omit low production engines, and usually say to inquire about anything not listed.
I've asked Steve for any more info he might have, but so far it's possible that this might be a special engine, quite possibly just made for MH.
Looks like it's time for you to join masseycollectors and (figuratively) throw yourself upon their mercy...with sympathy, Bud
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Old 09-24-2009, 11:41:38 PM
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Default Re: Massey Harris GP 4WD

Thanks for digging out all the info, Bud. I'll check Jensales site and see if they have a manual for that engine.
I'll have to join the Massey site. I have a 1930 M H/Wallis 12-20 of my own anyway in excellent original condition.
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