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WD45 Radiator Cap
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deereequipment1 View Drop Down
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Joined: 31 Mar 2011
Location: Southern MD
Points: 261 		Post Options Post Options   Thanks (0) Thanks(0)   Quote deereequipment1 Quote  Post ReplyReply Direct Link To This Post Topic: WD45 Radiator Cap
    Posted: 04 Apr 2011 at 6:31pm
Howdy all.
My WD45 has a non-original radiator cap.
the guy i bought it from said someone told him it was a non-pressure type of radiator, where other people told him differently.

Anyone know how to tell?
I also see from Agco, a 4 lb and 7 lb cap available. Not sure which way to go, depending on whether the radiator should be under pressure or not.

My WD parts tractor has different type of cap (the way the tabs are on the cap).

Any thoughts/suggestions?

Thanks.
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Ted J View Drop Down
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Joined: 05 Jul 2010
Location: La Crosse, WI
Points: 18896 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ted J Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2011 at 7:55pm
According to my manual, it is a 4 lb. system
"Allis-Express"
19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17
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deereequipment1 View Drop Down
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Joined: 31 Mar 2011
Location: Southern MD
Points: 261 		Post Options Post Options   Thanks (0) Thanks(0)   Quote deereequipment1 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2011 at 8:09pm
Thanks Ted!
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RickM(MO) View Drop Down
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Joined: 11 Sep 2009
Location: O'Fallon, MO
Points: 462 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RickM(MO) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2011 at 10:13pm
My WD45 manual says it is a 7 lb. cap.   When I had a 4 on it I would sometimes get some overflow out the overflow tube when it was warming up and the thermostat opened. I had my radiator cleaned out and pressure checked so I knew a 7 should work. Changed to a 7 lb. and have not had any problems. But 4 should work OK too and be less pressure to cause a leak somewhere in the radiator or hoses.
Missouri Allis Chalmers Club Member; 1954 WD45 (NF), 611LTD & 811GT Lawn Tractors
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