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Venturi

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Fredct

12-17-2002 19:27:38

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I have a case SC (44) that is an "all fuel". it has two inserts (venturi)in the intake ports in the head that restrict the flow into the intake valves. If I am going to be burning only gas in the tractor now, can I leave them out or, will the tractor not run right unless I change the entire assembly to "gas only"? Thanks, FSB

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RobertTX

12-18-2002 08:57:12

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Re: Venturi in reply to Fredct, 12-17-2002 19:27:38

The Ls and LAs also used the venturis. They will run fine on gas with or without them. One benefit of the venturis is they provide for perfect alignment of the manifold / gasket / head assembly when you put it together. This especially a factor on the L and LA because the manifold assembly is heavy and difficult to hold steady as you tighten the clamps.

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Mike Schotte

12-18-2002 02:49:09

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Re: Venturi in reply to Fredct, 12-17-2002 19:27:38

Hi Fredct,

Thanks for the question- you caused me to learn something today!

I just took the manifold of a '45 dual fuel SC last week, and I removed the 2 venturi from the inlet ports.

Until your post- I never thought twice about this... I just assumed that these were the "ferrules" shown in the parts book.

Well, a quick look at the parts breakdown diagrams shows that there ARE differences between the accessories needed for the two manifolds:

The low-cost fuel manifold uses two "venturi"- Part# 06375AB.

The gasoline manifold uses two "ferrule"- Part# 05767AB. These rings are much smaller than the venturi (which are about an 1-1/2" deep.

It appears that both manifolds use the same exhaust gasket number.

If you hadn't asked your question- then I would have just popped these back in when I switched the tractor over to the gasoline manifold!

Regards, -Schotte

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Gordon

12-17-2002 21:23:33

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Re: Venturi in reply to Fredct, 12-17-2002 19:27:38

I think you are talking about the sealing rings that go between the head and manifold.I think there should be 2 more on the exaust ports.Those rings are used on the D and C tractors and I think others.

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