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Tractor Pulling Discussion Forum

Transfer pump pressure

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1256 puller

06-26-2004 05:03:26




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I am rebuilding the injection pump on my I.H. 1256 for pulling . I would like to turn up the transfer pump pressure to around 140-150 psi.Is there a way that I can test the pressure myself by installing a gauge on the transfer pump housing or some other location? The local injection service won't bench test my unit unless they put it together . B.T.W. my pump is the stock Roosamaster with stock head and rotor. The only modification that I have made so far is to tighten up the leaf spring screw and backed off the torque screw.I assume that by tightening the adjustment screw in the transfer pump regulator will increase transfer pump pressure- am I right?

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JD

06-26-2004 12:43:04




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 Re: Transfer pump pressure in reply to 1256 puller, 06-26-2004 05:03:26  
the best way to do this is to take the vanes out of the transfer pump, and use an external electric pump. That kind of pressure on the vanes will side load the rotor and sieze the pump. The plug in the bottom of the transfer housing may be plastic and blow at about 100 psi, so put in the steel one that comes in the gasket kit part #24371. Volkswagon fuel injection uses an electric pump that will work

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1256 puller

06-27-2004 15:37:04




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 Re: Re: Transfer pump pressure in reply to JD, 06-26-2004 12:43:04  
Thanks for the info. JD.Could you tell me what particular model VW I should get a pump from ,maybe a diesel Rabbit or pick-up?Is alot of pressure really what I'm after or should I get an inline electric pump that that has mild pressure but very good volume?Summit Racing sells an Aeromotive pump that has 65 psi. but flows over 400 lbs. per hour.They claim this is enough to support a 700h.p. fuel injected gasoline engine.

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JD

06-27-2004 21:13:54




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 Re: Re: Re: Transfer pump pressure in reply to 1256 puller, 06-27-2004 15:37:04  
fuel pump from a gas vw rabbit, makes 80 to 90 psi ( dont need any more than that fuel doesnt compress much) and will have plenty of volume, new are $$$ so find a junker.



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