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Fordson Tractors Discussion Forum

rack on injector pump

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hahter

12-07-2005 03:37:50




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How can I open the rack up for more fuel. I have a 53 Power Major with a vacumn governor. Any help would be appreciated.
Thanks




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FarmerG

12-08-2005 18:18:42




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 Re: rack on injector pump in reply to hahter, 12-07-2005 03:37:50  
I"d go after the adjuster screw at the end of the excess fuel/stop control lever assembly. Looking at the operation of the system, pulling the stop lever slides the rack forward to cut off fuel. I"d guess that backing the adjusting screw outward will allow the rack to slide backwards further to allow more flow. An aquaintance of mine sets his Majors up for pulling and I believe this is one of the things he does. Wish I knew how to insert images into this stuff, I"ve got a great parts breakdown of the injector pump. Jerry

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matt in PA

12-09-2005 05:52:00




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 Re: rack on injector pump in reply to FarmerG, 12-08-2005 18:18:42  
Farmer G, could you email those diagrams to me also. I have been looking for injector pump diagrams for a while. Just click on my name, my email address is attached. Thanks in advance!



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hahter

12-09-2005 04:02:38




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 Re: rack on injector pump in reply to FarmerG, 12-08-2005 18:18:42  
Farmer G can you email me those pictures. My email is hahter@bellsouth.net. Thanks



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hahter

12-08-2005 15:24:26




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 Re: rack on injector pump in reply to hahter, 12-07-2005 03:37:50  
Thanks I will give that a try. If I screw the pump up I have more pumps to play with till I get it right.



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BazHJ

12-08-2005 13:11:27




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 Re: rack on injector pump in reply to hahter, 12-07-2005 03:37:50  
Very difficult to get right without test equipment. If you take the plate off the injector pump you will find four square head bolts connecting speed control rod to pistons these pistons are rotated by the rod to vary the amount of fuel delivered by each pump cylinder to its injector. The fuel delivery from each pump cylinder can be altered by moving the square bolt and clamp along the rod.
The real purpose for these is so that the fuel injection specialist can calibrate each cylinder to give the same amount of fuel by using specialist equipment. The difficulty is in getting them balanced again, enabling the engine to slow idle, the stop control may not work and the engine may become smokey.
The actual Major engine was occaisonally uprated in power during its production and this included redesigned cylinder heads etc. which suggests that there is little scope to simply boost the fuel supply in order to gain extra power.

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