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John Deere Tractors Discussion Forum
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JD Model L Hercules oil pump problem

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Jim Ghormley

12-16-2005 11:12:26




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I am having oil pressure problems on a 1938 John Deere model L with a Hercules NXB engine. I need the specifications and tolerances for the oil pump gears and the gear to oil pump housing for this Hercules oil pump to determine if it is good or not. Does anyone know where I can get that or know how to determine if the pump is good?
thanks, Jim




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the britt

12-16-2005 15:07:13




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 Re: JD Model L Hercules oil pump problem in reply to Jim Ghormley, 12-16-2005 11:12:26  
sounds like we are working on the same project i have a spare pump i need to find the spec s for the mains and rod bearings we might be able to work together



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jim Ghormley

12-16-2005 15:57:28




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 Re: JD Model L Hercules oil pump problem in reply to the britt, 12-16-2005 15:07:13  
the britt,
The crankshaft main bearing clearances for the Hercules BX and NX engine is .002" to .0025".
Connecting rod bearing clearance is .001" to .0015". All the info you need is in a little 13 page book called Hercules Operator"s Handbook for BX and NX series, dated 1942. I can send you a copy if you want. Let me know. What do you know about oil pressure problems?
This is my home email so send your message to both here and my work email.
Jim

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