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Allis Chalmers Discussion Forum

Fed up with my WC!! Any advice?

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Kevin (OH)

04-24-2004 18:08:59

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I just recently had new valves, springs and seats put in the head on my WC. Also, I have replaced the ignition and put a rebiuld kit in the carburetor. Now I can't get the thing to run smooth at all. Not sure if I am missing an adjustment on the carb or the tappets or what. Also, at best, I only have 9 lbs oil pressure. What is normal for an old wore out WC? Thinking that I need something newer but, where's the fun in that? Thx. Kev

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Melinda Marks

04-27-2004 09:44:43

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 Re: Fed up with my WC!! Any advice? in reply to Kevin (OH), 04-24-2004 18:08:59  
What would you sell it for?

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04-26-2004 07:53:56

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 Re: Fed up with my WC!! Any advice? in reply to Kevin (OH), 04-24-2004 18:08:59  
As to the oil pressure those guys have already told you all I can. But you might try looking at the timing gears. Your trouble sounds like my B and it was one tooth out of time.


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04-25-2004 17:08:16

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 Re: Fed up with my WC!! Any advice? in reply to Kevin (OH), 04-24-2004 18:08:59  
Might you have a vacume leak? Manifold to head or carb to manifold. Or even an old rusted manifold leaking air somewhere. As for oil filters, look for one with a perforated metal bottom with rag/cloth waste visible through the perforations, and a wood dowel shoved up the middle to keep the opening open. Remove this wood dowel before using the filter. Make sure there is a metal tube sticking up from the filter base to direct the oil to the top of the filter. If this tube is missing it will lower the oil pressure. sometimes they come loose and get thrown out with the old filter. If you want a little more oil pressure you could try putting one or two washers/shims under the relief valve spring. It is behind the big plug on the lower right side of the block about where the universal joint in the steering shaft is. Just find a small washer that will fit in the cap where the spring seats. 1/8" here is a lot to shim.

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04-25-2004 09:13:47

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 Re: Fed up with my WC!! Any advice? in reply to Kevin (OH), 04-24-2004 18:08:59  
Oil pressure is not out of line. Should read around midrange on the NORMAL gauge. That probably amount to about ten pounds. Tappet adjustment might be in order- was it checked after running in the engine? I think they should be set cold, according to the manual. Crank needs to be rotated for making that adjustment.

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04-24-2004 19:58:03

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 Re: Fed up with my WC!! Any advice? in reply to Kevin (OH), 04-24-2004 18:08:59  
Kevin, What year is your WC? Does it have a magneto or does it have a distributor with points/condensor and coil? When you say you replaced the ignition, what exactly did you all replace? Rough running from ignition side can be from the spark plugs, spark plug wires, wrong firing order, incorrect point spacing, bad coil, bad condensor, bad distributor cap. Firing order should be 1243 if I remember right. If you had the carburetor apart and put it back together, their may be something that is in the carburetor restricting the fuel or an overlooked adjustment. It can be frustrating figuring out why something isn't running right but with some patience and tracing things down step by step you should be able to trace it down. As far as the oil pressure goes, what filter did you use. The new wix and napa filters are causing a lot of problems for oil pressure on the old AC's. Get a Hastings or Baldwin.


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Kevin (OH)

04-27-2004 17:29:40

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 Re: Re: Fed up with my WC!! Any advice? in reply to Wil, 04-24-2004 19:58:03  
OK, now that I went back and checked things from the begining, I found that I had two plug wire turned around. :} Anyway, thanks for the help.

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