M5640SU Block Heater Location?

WCF

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Nov 24, 2017
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Marble Falls, AR
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Hi all!
I have been trying to find the plug on an M5640SU tractor to install a block heater. For some reason the location has alluded me so far. Does anyone have a picture of the plug location or in lieu of that, provide details on where I can find it on this darn thing?

Greatly appreciate any help and I feel confident someone on this forum knows. :)
 

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
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Williamstown Ontario Canada
I don't know your specific tractor but I believe it will be in the red box area of this photo I found on line.



If this is a new tractor with the latest emission system, it is very possible that the computer or glow plug controller needs to be programmed to know there is a block heater.

In very cold weather, with the block heater plugged in, the glow plug sensor will lock out the glow plugs as it senses a warm engine.
However, starting, in these circumstances can be rough and worrisome as the engine is still inhaling say -35 air.

There is a trick for the pre emission Kubotas. Mine is a M7040 2012
The trick is to put the shuttle shift lever in forward and turn the key to the start position.
You will hear a relay click on. I count to 10, put the shuttle back into the neutral position and start the engine.
Makes an amazing difference.

I have recently learned that Kubota has recognized this issue with block heaters and, on tractors where a block heater is installed, there is a programming change to tell the GP system to use a different temp sensor and then the GP's will come on even if the block is warm..

If you are installing the block heater yourself, you might be missing out on this programming.

Dave
 

JerryMT

Active member

Equipment
Kubota M4500, NH TD95D,Ford 4610
Jun 17, 2017
528
156
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The Palouse - North Idaho
I went through this on our M4500.I researched part numbers on the web etc but I could find any installation instructions. I asked for advice on this forum and after looking at the engine and finding core plugs, I talked to the parts manager at our local dealership. Kubota offers a kit for the M4500 with a female threaded stainless steel bushing that you drive into the core plug hole and then screw in a NPT heating element.
My advice is to talk to your local dealership folks and they should be able to help you.
While I'm at it, I really fault Kubota on the quality of their service literature. We have an older Ford 4610 and a 2007 New Holland TD95D and the service literature, which includes system descriptions, is light years ahead of what I can get from Kubota. Maybe some of the newer equipment has better service literature but what I can get for our'78 M4500 sucks.
 

WCF

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Nov 24, 2017
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Marble Falls, AR
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Thank you so much Jerry. I've spoken with the dealership and they can't even tell me where it's located. I say that b/c, where they did tell me to look, I did not find it which is why I turned to this forum. As far as the literature, or lack thereof, I 100% agree.
 

WCF

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Nov 24, 2017
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Marble Falls, AR
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Thanks Dave. I was not aware whatsoever about the possible computer reprogramming. This tractor is an M5640SU / I think 2014 model year. I will look in that area again for it.

The trick you mentioned is new to me and I'm going to try that too. ;-)