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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Problem With 550 Oliver ...

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Jim Patton NO

08-17-2004 18:38:16




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Can anyone tell me why an Oliver 550 why idling would speed up, then return to idle speed, speed up, then return to idle speed? It just keeps doing this as long as it is idling. What's going on here?




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TheRealRon

08-18-2004 05:01:13




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 Re: Problem With 550 Oliver ... in reply to Jim Patton NORCAL, 08-17-2004 18:38:16  
Most likely the governor is defective or misadjusted, could also be a vacuum leak (carb/manifold or manifold/head).



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super 55

08-18-2004 08:42:15




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 Re: Problem With 550 Oliver ... in reply to TheRealRon, 08-18-2004 05:01:13  
I was reading in the manual you can do a test for the vacuum leak by disconectin the air cleaner at the carb. Take a piece of card board and slowly cover the opening. Do not use the choke to do this. As you cover the opening the idle should slow down before it stops. If it stops abruptly there is a leak.



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TheRealRon

08-18-2004 11:17:24




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 Re: Problem With 550 Oliver ... in reply to super 55 , 08-18-2004 08:42:15  
That will tell you that you have a leak but if you want to know exactly what's leaking... with the engine at warm idle...

either

1) Spray carb/choke cleaner at every carb/manifold/head mating surface

or

2) Place a 2' length of hose over the end of your propane torch... open the valve and point the end of the hose as above

Either way, any change in engine speed or sound means you are pointing directly at the leak.

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JD in da UP

08-18-2004 04:46:12




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 Re: Problem With 550 Oliver ... in reply to Jim Patton NORCAL, 08-17-2004 18:38:16  
If it's gas, it may be a problem with the governer.



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super 55

08-17-2004 22:42:31




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 Re: Problem With 550 Oliver ... in reply to Jim Patton NORCAL, 08-17-2004 18:38:16  
Is it gas or diesel? One simple thing is try taking the fuel cap off and see if it stops.



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