SAE bolt pattern on 4-239 engine?

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NWJD fan
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SAE bolt pattern on 4-239 engine?

Post by NWJD fan » Mon Mar 22, 2021 2:56 pm

Anybody here know what the SAE bolt pattern for a JD 4-239 engine as installed in a 450B loader is?

Jim B
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Re: SAE bolt pattern on 4-239 engine?

Post by Jim B » Mon Mar 22, 2021 3:41 pm

I don't think they are SAE, I believe they are a proprietary John Deere design.

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LeonardL
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Re: SAE bolt pattern on 4-239 engine?

Post by LeonardL » Tue Mar 23, 2021 7:26 am

Okay I'm not real bright!! Which is most of the time these days and I admit it... but what the hell are you asking? What am I not getting here? What bolt pattern are you referring to? Somebody smarter than I am please help me out here!! :D
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Re: SAE bolt pattern on 4-239 engine?

Post by Jim B » Tue Mar 23, 2021 8:33 am

Hi Leonard, here is a quick answer. SAE established some standard bolt patterns for bell housings years ago, based on engine sizes. The bell housing would match the mounting holes of the engine block and the transmission side would generally be round with a specific bolt size/pattern for a transmission to bolt to. Most often found in truck applications where different transmission options are used with the same engine, although many manufacturers now design bell housing options to the SAE specs. The JD engines in their equipment did not use SAE as the engines were direct coupled to the rest of the drive train and often were structural members of the tractor or crawler, using their components through out. They may have some SAE options now as they are more into supplying newer engines for manufacturers of different equipment like compressors, generators, marine, etc.

I am guessing he is thinking of either transplanting a different engine, that uses an SAE bell housing, into a 450B; or using that 450B engine in something that needs the SAE bell housing.

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shinnery
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Re: SAE bolt pattern on 4-239 engine?

Post by shinnery » Tue Mar 23, 2021 11:06 pm

One example of an engine designed for a SAE belhousing is the Cummins ISB series of diesel engines. They fit almost anywhere.
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Stan Disbrow
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Re: SAE bolt pattern on 4-239 engine?

Post by Stan Disbrow » Wed Mar 24, 2021 4:29 am

Hi,

Nope. No SAE here. Deere here. They do their own thing. Probably because the engine has to hold up the tractor. Anything SAE doesn't have to hold the front end of the truck to the rear end using the engine and transmisson as the frame. Or, in the case of crawlers, the engine hangs off the bell housing bolts.

I wonder how my Cummins engine would hold up in my Dodge if it were held only from the transmission?

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LeonardL
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Re: SAE bolt pattern on 4-239 engine?

Post by LeonardL » Wed Mar 24, 2021 7:51 am

Jim B wrote:
Tue Mar 23, 2021 8:33 am
Hi Leonard, here is a quick answer. SAE established some standard bolt patterns for bell housings years ago, based on engine sizes. The bell housing would match the mounting holes of the engine block and the transmission side would generally be round with a specific bolt size/pattern for a transmission to bolt to. Most often found in truck applications where different transmission options are used with the same engine, although many manufacturers now design bell housing options to the SAE specs. The JD engines in their equipment did not use SAE as the engines were direct coupled to the rest of the drive train and often were structural members of the tractor or crawler, using their components through out. They may have some SAE options now as they are more into supplying newer engines for manufacturers of different equipment like compressors, generators, marine, etc.

I am guessing he is thinking of either transplanting a different engine, that uses an SAE bell housing, into a 450B; or using that 450B engine in something that needs the SAE bell housing.
Thanks Jim... My idea of bolt pattern and what he was wanting to know were two completely different interpretations. I understand what he needs now. Thanks for straightening me out. I'm a little thick sometimes!! :roll: :lol:
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

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Re: SAE bolt pattern on 4-239 engine?

Post by LeonardL » Wed Mar 24, 2021 7:54 am

Also Deere has a bell housing for SAE applications. And no I don't know the part numbers. Most of their stationary power units had these bell housings on them.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

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