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Antique Steel Wheel Tractors - Old Iron Lugs and Cleats

18-36 Hart Parr Radiator Extension


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  #1  
Old 01-01-2018, 10:14:11 PM
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MSimons MSimons is offline
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Default 18-36 Hart Parr Radiator Extension

I recently found what I believe is an 18-36 Hart Parr radiator with an extension. It looks to be factory. I had assumed it was for a power unit but the parts book I have only lists an extension for tractors (Part # 13204). This radiator also has a tin fan shroud that I haven't seen before. Can anyone tell me about these? Thanks in advance.
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Old 01-02-2018, 10:19:41 AM
Autotrac Autotrac is offline
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Default Re: 18-36 Hart Parr Radiator Extension

Maybe it's a retro fit for the early 28-50s before they got the big rad??
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Old 01-02-2018, 09:15:34 PM
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Default Re: 18-36 Hart Parr Radiator Extension

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Originally Posted by Autotrac View Post
Maybe it's a retro fit for the early 28-50s before they got the big rad??
That thought had crossed my mind as well. But I wonder why is it listed in the 18-36 parts book?
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Old 01-02-2018, 09:37:46 PM
Dave Preuhs Dave Preuhs is offline
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Default Re: 18-36 Hart Parr Radiator Extension

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Originally Posted by MSimons View Post
That thought had crossed my mind as well. But I wonder why is it listed in the 18-36 parts book?
I've never seen the radiator extension before, I will have to check my parts too. Maybe it was something they used on tractors for hotter climates???? Or at least had it available to sell. Have you checked any other model to see if they had rad extensions?
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Old 01-02-2018, 09:41:46 PM
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Default Re: 18-36 Hart Parr Radiator Extension

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Originally Posted by Dave Preuhs View Post
I've never seen the radiator extension before, I will have to check my parts too. Maybe it was something they used on tractors for hotter climates???? Or at least had it available to sell. Have you checked any other model to see if they had rad extensions?
Hi Dave,

I only have an 18-36 parts book so that is the only one I was able to check. Would appreciate hearing what you find.

Thanks
Michael
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Old 01-02-2018, 10:26:44 PM
halcon halcon is offline
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Default Re: 18-36 Hart Parr Radiator Extension

Possibly when burning low cost fuels and using a lot of combustion water they found they didn't have enough water on board as they used it out of the cooling system. With Hart-Parr's high mounted water pump allowing it to run low could cause the pump to loose its prime.
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Old 01-02-2018, 10:30:52 PM
Dave Preuhs Dave Preuhs is offline
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Default Re: 18-36 Hart Parr Radiator Extension

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Originally Posted by MSimons View Post
Hi Dave,

I only have an 18-36 parts book so that is the only one I was able to check. Would appreciate hearing what you find.

Thanks
Michael
Michael, I tried looking in the 12-24 book but couldn't find anything like that, maybe I missed it too. I did find that part number in the 18-36 book so it must be authentic, can't be many of those around. By time HP figured out the 22-40's and early 28-50's had a heating problem they came out with the big radiator 28-50.
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