Pressurized vs non pressurized system on b
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Topic: Pressurized vs non pressurized system on b
Posted By: Nick m
Subject: Pressurized vs non pressurized system on b
Date Posted: 09 Feb 2018 at 8:54am
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I have a B bought in pieces. It has a water pump and came with what I think is a radiator designed for the early system. Has internal fastening for the cap. From what I can find, all I can buy is a non pressurized cap for it. Will that be fine, or should I buy a different radiator? This one is in very good shape. Never had to deal with this so I could be thinking all wrong.
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Replies:
Posted By: Gerald J.
Date Posted: 09 Feb 2018 at 9:35am
My Shoup 2013 catalog shows only one radiator for B, also fits C, CA, D10, and D12. A pressurized cooling system raises the boiling temperature of the coolant and allows for better engine efficiency, and a more effective radiator
In the early B days, with alcohol based antifreeze, thermostats typically were 160 F because running warmer would boil off the antifreeze, so radiators weren't pressurized. With modern antifreeze thermostats run 180 or warmer with pressurized radiators. Adding the modern antifreeze raises the boiling point of the coolant too. One way to test for the amount of antifreeze is to test for that boiling point with a sample in a pot on the kitchen stove using a cooking thermometer. I'd test the thermostat too. I don't even trust new thermostats without testing them before installation.
The shop manual should show such details and variations. The Op manual too, but I don't have an Op manual other than the military manual.
http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf
http://geraldj.networkiowa.com/Trees/BMilitary.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/BMilitary.pdf
Gerald J.
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Posted By: Brian Jasper co. Ia
Date Posted: 09 Feb 2018 at 1:29pm
If the radiator is in good condition, just get a new non pressurized cap and use it. You can go to the new style rad if you want to, but you'll never have a problem with boiling over with the original and 50-50 antifreeze.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: Bill Long
Date Posted: 09 Feb 2018 at 1:48pm
The B is a basic "cold running" tractor, even with the pressurized system.
In fact, the only B we had with a overheating problem belonged to a Golf Course. The radiator was leaking but there was no problem there is always plenty of water available on a golf course. If it did overheat they would fill in from the lake or stream. Of course, no one considered the dirt flowing in the stream.
The dirt collected in the block and clogged the coolant flow.
Needless to say they needed a radiator repair, a tear town, and flush.
Take good care of my favorite
Good Luck!
Bill Long
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Posted By: Nick m
Date Posted: 09 Feb 2018 at 3:14pm
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Thanks guys. I'll find a cap and go with it.
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