JoeJChin
Member
I am looking for some help with trying to determine if i have a problem with the Yanmar injection pump on my JD 750 tractor.
I was running the tractor and had shut it off to refuel it, it was only off for about 20-30 minutes
Haven't been able to get it started since,,,,,,,,,,,,...
I went thru the whole bleed the system thing several times , just to cover that problem , but the tractor was not run out of fuel , just shut off.
There is no electrical shut off on this tractor just mechanical.
When i took the inspection/access plate off of the side of the gearcase the pump is mounted to, it looks as though the rack on the pump is not moving at all
when moving the throttle lever from shut off to full throttle position .
I pulled the pump according to the instructions in the tech manual i have .
The rack on the pump that moves with the throttle lever is very difficult to move back and forth .
Problem is , i don't know if this is normal or not .
WAs hoping someone on here might have had one of these pumps out and knows if it should move very freely or it takes some effort ( i kind of need to put both thumbs on it to press it )
This is a link (if it works ) to a picture of the pump on my tractor .
http://www.jhdiesel.com/Mvc-017s.jpg
The picture on the right shows the rack that moves with the throttle linkage (a fork sits over the pin sticking out of rack and slides it open or close it .
thanks
Joe
I was running the tractor and had shut it off to refuel it, it was only off for about 20-30 minutes
Haven't been able to get it started since,,,,,,,,,,,,...
I went thru the whole bleed the system thing several times , just to cover that problem , but the tractor was not run out of fuel , just shut off.
There is no electrical shut off on this tractor just mechanical.
When i took the inspection/access plate off of the side of the gearcase the pump is mounted to, it looks as though the rack on the pump is not moving at all
when moving the throttle lever from shut off to full throttle position .
I pulled the pump according to the instructions in the tech manual i have .
The rack on the pump that moves with the throttle lever is very difficult to move back and forth .
Problem is , i don't know if this is normal or not .
WAs hoping someone on here might have had one of these pumps out and knows if it should move very freely or it takes some effort ( i kind of need to put both thumbs on it to press it )
This is a link (if it works ) to a picture of the pump on my tractor .
http://www.jhdiesel.com/Mvc-017s.jpg
The picture on the right shows the rack that moves with the throttle linkage (a fork sits over the pin sticking out of rack and slides it open or close it .
thanks
Joe