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John Deere Tractors Discussion Forum
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60hot cold valve

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jody

03-02-2004 17:08:45




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I bought this 60 last fall and it ran fine, as can be expected for its age, and the age of the fuel.
but when it became cold it needs to be choked.
now the other day I was reading the manual for the tractor, and it says the 2 cyl intake has a hot and cold valve, turned according to the temp,
now when I found the one on my 60it was so rusted shut I barely recognized it.
my question is what does this valve do?
and will it hurt anything to run the choke closed?

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buickanddeere

03-04-2004 06:11:48




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 Re: 60hot cold valve in reply to jody, 03-02-2004 17:08:45  
Unless the tactor is being used continious at 80+% power in hot weather and is suffering detonation. Use the hot position. It saves fuel and engine wear by ensuring the fuel drawn into the engine is flamable vapour rather than unburnable liquid. Allows the idle mixture to be set leaner and the choke moved open sooner after startup. The choke is used to provide a grossly rich mixture for starting to ensure some fuel is in vapour form. Soak the valve with your favourite rust buster for several days starting when it's just cool enough to touch after being shut down. Heat the nut red to allow removal and pound the valve straight down with a brass punch. Then turn fully to hot and replace the nut which draws the valve up.

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Ron

03-02-2004 17:57:22




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 Re: 60hot cold valve in reply to jody, 03-02-2004 17:08:45  
Don't worry about that valve posotion...!!

They ALL rusted and stuck..it will Never move, and it doesent have to...if it is set to "Cold"..! When the Coolant temp gets up to operating levels, you can push the choke all the way in.. That valve, when moved to the "Hot" position, ran exhaust heat from the left cylinder, thru a passage around the intake runners, to heat that area up... You won't need to move it...!!

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