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Charles Craig 
Bronze Level
Joined: 12 Sep 2009
Location: Oro Grande CA
Points: 48
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 Topic: OT Fuel pressure, adjustable
Posted: 02 Feb 2010 at 4:31am |
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Let me apoligize to the people on this forum because this is not AC but is tractor related. I have a "HOUGH" Payloader model 50. the original fuel pump has been changed out. This machine has a IH engine ,like in a pick-up. I talked to the PO and he admitted to the "change" . My dillema is that I dont know what the correct fuel pressure is. Can any one enlighten me. All opinions will be greatly appreciated. TIA CC
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AC BD3 roadgrader "D" road grader SIX "old" cars Farmall 300
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dadsdozerhd5b
Orange Level
Joined: 27 Sep 2009
Location: lansdale pa.
Points: 527
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Posted: 02 Feb 2010 at 4:37am |
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is it a gas engine? what kind of fuel pump? diaphragm or electric?
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HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.
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Charles Craig
Bronze Level
Joined: 12 Sep 2009
Location: Oro Grande CA
Points: 48
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Posted: 02 Feb 2010 at 4:49am |
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GAS --MECHANICAL Diaphram I think CC
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AC BD3 roadgrader "D" road grader SIX "old" cars Farmall 300
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JC-WI
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Joined: 11 Sep 2009
Location: wisconsin
Points: 33667
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Posted: 02 Feb 2010 at 7:29am |
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The new fuel pumps get eat up by the new gas we have if they sit for a period of time. combine engine has had pump replace twice in 3 years. The last pump taken off, you could blow ir through it backwards. Can't pump fuel that way. Take pump off and stroke lever and hold thimb on discharge port, it should hold pressure until you release your thumb from port
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Charles Craig
Bronze Level
Joined: 12 Sep 2009
Location: Oro Grande CA
Points: 48
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Posted: 02 Feb 2010 at 3:51pm |
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the mechanical fuel pump that is on the engine now is overloading the float-shut off in the carb. What is the optimum PSI for this set-up/. I have an adjustable regulator that goes from 1 lb to 5 lbs. Thanks in advance CC
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AC BD3 roadgrader "D" road grader SIX "old" cars Farmall 300
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dadsdozerhd5b
Orange Level
Joined: 27 Sep 2009
Location: lansdale pa.
Points: 527
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Posted: 02 Feb 2010 at 5:46pm |
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any info i have found says 4-10 psi. i would go on the low side if your float will not hold. if it still will not shut it off, replace the needle and seat. it does not take much pressure to keep a carb full, just volume. hope this helps.
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HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.
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JC-WI
Orange Level Access
Joined: 11 Sep 2009
Location: wisconsin
Points: 33667
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Posted: 02 Feb 2010 at 7:25pm |
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Check and make sure you floats are not crushed or full of fuel, check to make sure your inlet to carb is absolutely clean as well as the needle seat area. Also check float height and make sure your float arms are not bent to the point that it allows flooding.
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