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Wayne, Journeyman
Category: Heavy Equipment
Satisfied Customers: 13007
Experience:  34 years experiance as engine rebuild and problems.Thermo-King repair and trouble shooting.
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On a john Deere 4430, how do you remove the block heater? I

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On a john Deere 4430, how do you remove the block heater? I pulled that big nut off the center piece where the plug wire goes into. I tapped it but doesn't budge. The whole thing is about 2 1/2 inch in diameter.


Hi, I'm Wayne.

I'll be assisting you with this issue today.

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Your Question is as important to us as it is to you.

I am sorry to hear you are having this issue.

After you remove the small nut in the center, then you need to unscrew the big outer nut

that screws into the side of the block.

Picture below.

I hope this helps you.


Customer: replied 10 days ago.
it looks like attached pic


Thank you for the response.

OK, you have the earlier style heater like the picture below.

That is still threaded into the block.

You need to use a small chisel and loosen the housing to unscrew.

I suggest getting the new style with the hex head nut.



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