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SIMMS injection pump adjustment

F

FlorianK.

New User
Hello to all, I changed the SIMMS injection pump on my Super Major, model year 1963. After changing the pump the engine had low rpm. Does anybody know how to increase the fuel flow. Which is the right screw for giving the engine more fuel in order to reach the neccessary rpm. For your information, there are two hexagon screws fittet in vertical position on the left hand side of the pump and both are secured with a nut and a locking wire. But I could find another screw (slotted screw) also secured with a nut located close to the left of outcomming 4ea fuel pipes.
Thank you in advance for your help and maybe sorry for writing in an incorrect English language, because I am from Germany an found this good forum - thank goodness - via the internet.
Regards
Florian
 
Hi before trying any adjustments check that the pump type and #no is identical (same part No etc)Because if they are not you may have to reset the basic timing first to get it right. MTF
 
Hi Mike Farmer, the new injection pump is exactly the same as the old one which was fittet on a FSM 1963 also. So the timing is correct. But the only difference was that the fitted pump had been reduced in fuel flow in order to have less power. This had been done in order to get a cheaper insurance rate here in Germany. So I am going to find the original adjustment. But how? Do you know which is the right screw for the fuel flow adjustment to reach the original rpm? Thank you in advance for your help. By the way, is it neccessary for you to give you the number of the pump or to post a picture of it?
 
Guten Abend Florian K Wie geht es einen. In the next couple of days I will send you a copy of the fuel pump pages in the fordson manual. However as Bendee says these are set with specialised equiptment on a test bench. MTF
 
Hi I have just rechecked the manual. What is the engine No of your tractor. Does it have a vacuum controlled governor or is the pump a Minimec?
If it is the vacuum type ensure that the stop control goes absolutely fully forward. If so try adjust the fast running screw at the air intake manifold. If it is minimec pump the adjuster is on the engine side BUT really should only be adjusted by a qualified engineer although if you are very careful its possible to do it. Does your machine have a rev counter. MTF
 
Hi Mike Farmer,
thank you for your quick response. I do not know what kind of pump it is (vacuum type or minimec). I will post a picture and all numbers you need asap. By the way, your German seems to be not very bad.
Best Regards
Florian
 
p7182.jpg


Hello Mike Farmer, here you will find a pic of my Fuel injection pump. Could you identify now what kind it is (SIMMS or Minimec)? The no of the pump is SPE4A75S515 and engine No is 1609702 (engraving on the engine block). There is another No below the engraved one: E1ADDN6015. Is it possible to tell me how to adjust the fuel flow to increase the rpm and what is the function of these three screws I marked. Thank you for your answer.
P.S. Do not be confused about all the control rods, because I retrofitted a gas pedal and a dual funcion control rod for pushing the cold start button and to stop the engine whith the same rod.
Regards
Florian
 
Hi Florian. Your engine No comes up as July 1961. I can't identify that pump because I have never seen one like it on any Major. The pump No does not relate to any information that I have. My book says they were fitted with No'sSPE 4A 498 or 527 or 647 I cant find anything giving 515. Sorry I really can't be of more assistance, but please dont hesitate to ask MTF
 
Hi Mike Farmer, thanks a lot for the research you have done. It seems that I have something special fitted on my Major. I have also done some research in the web (Google) and I couldn't find anything about the pump with No SPE4A75S515. But if someone else could tell me some details about this pump, please do not hesitate to post a message.
Again thanks for your support.
Best regards
Florian
 
Forian
That injector pump is a mechanical type, not a vacumn type.
It is usually fitted to industrial engines.
The 2x screws on the left are low rpm and high rpm. can't remember which is which though. These will only increase or decrease rpm's, not increase the amount of fuel that the engine receives per injection.
Hope this helps.
Kiwi Kev
 
FlorianK
You could unlock one adjustment and turn it half a flat, then lock it back up and see what changes it made. If not satisfactory put it back to the original position and then try the other adjustment.
This procedure, if followed correctly; will allow you to return to the original settings; if it fails to resolve your issue.
Post back
Brian
 
Hi Brian Allen,
Hi kiwi kev,
Thank you for your answers. I will try to make some tests with different adjustments on these 2x screws. I will let you know the result as soon as possible.
Best regards
Florian
 
Hi Brian Allen,
Yesterday I made some adjustments on the both screws on the left hand side. I could adjust the rpm successfully. For your information, the lower hexagon screw was the right one to adjust the maximum rpm level. Thank you for any tip you gave.
Best Regards
Florian
 
Can anyone please help with my Nuffield 4/60 pump governor? The engine revs out of control, and has to be restrained with the engine-stop control on any downhill slopes. Will the governor be included in a pump overhaul, or do I just need a governor repair? Thanks, Dave
 
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