Mf35 goes full throttle at startup after reseal of cav

   / Mf35 goes full throttle at startup after reseal of cav #1  

jclaudii

Silver Member
Joined
Apr 17, 2012
Messages
135
Location
River Valley and South Arkansas
Tractor
MF35, Kubota7040, Case885, Ford 1100
Good evening, I finally got around to pullin my pump and watched several YouTube tutorial's on how to do it. This is on a 3 cyl perkins

The good news is the leak seems to be fixed and it started!

Bad news is it goes full rpm after it starts and I have to kill it by pulling fuel stop.

I am going to have to pull the top off the pump and see if the metering valve got pinched by the gasket or something. Also I'm going to check to make sure my governor plate spring did not fall off and that the plate is in the correct position which leads me to my question.

Does the plate slide down just onto the main shaft or does it slip into the governor weight basket contraption?

Also, when assembling this weight basket it spins separately on the main splined shaft...meaning that as the pump shafts turns it does not and I'm not sure if it is suspossed too. This was the way it was when removed as I have no leftover parts :)

I know I'm close, just need a bit of help from those that have done this before. Bright side is it runs. Also my amazon kit did not have all the washers I would need. I am leaving a review as some other parts did not fit and I had to reuse the old ones.


Thanks for any help!
 
   / Mf35 goes full throttle at startup after reseal of cav #2  
The governor plate slips over the shaft and pushes on the governor ring. See illustration.

Other than that, it sounds like the spring came off of the metering valve or it is in the wrong hole
 

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   / Mf35 goes full throttle at startup after reseal of cav
  • Thread Starter
#3  
I did a double check for spring position as I took photos before to make sure it got back into the same place. I tried to get a pic of the tombstone riding on the shaft by the flywheel weight contraption. I may have to wait till a nice day and pull it all again.

I can kinda force it to run and a lower rpm by pulling the fuel stop in or out just a bit.

I did put a new oring on the basket shaft. I think it is assembled correct but I can not find a great diagram or picture of it.

Does that weighted contraption spin with the shaft or does it freespin?
 
   / Mf35 goes full throttle at startup after reseal of cav #5  
The "weighted contraption" spins with the shaft. The "tombstone" meshes into the sleeve on 2 grooves. The sleeve is stationary. The picture shows 2 grooves at the end and that is where the "tombstone" catches it, but the picture shows the "tombstone" in the wrong place. It should be at the end.
 
   / Mf35 goes full throttle at startup after reseal of cav
  • Thread Starter
#6  
I believe it is in the correct groove, i'll try and get a better picture. In this image it shows the tombstone riding in front of the thrust sleeve(14). I thought I had assembled it riding IN the thrust sleeve but it appears to be in the correct position.

The only thing I think I have wrong is a shim that sits between the weights and the weight basket. Some videos I watched show it going between the thrust sleeve and the back end of the weights.

I guess i'll end up pulling it off again and going through it as I am not really sure!

1712064269563.png
 
   / Mf35 goes full throttle at startup after reseal of cav
  • Thread Starter
#7  
Here is how I have it right now. This is how it was except a shim was misplaced under weight basket
20240402_154602.jpg
 
   / Mf35 goes full throttle at startup after reseal of cav #8  
Looks right.
 
   / Mf35 goes full throttle at startup after reseal of cav #9  
U gotta wire wheel/sandblast those weights.. especially in the cut, where the washer and sleeve ride..
That “gummy stuff” will only get worse and slow down the gov reaction..
Good luck
 
   / Mf35 goes full throttle at startup after reseal of cav
  • Thread Starter
#10  
one of my main questions is: Does this governor turn independently from the shaft or should they lock in somehow?
The only thing not shown in this image is the o-ring that holds it on the far top left. and the washer/shim is what I had in between the base of the basket and the bottom of the weights. Now the washer/shim is at the bottom of the sleeve so it can ride on the weights.
 
 
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