Removing injection pump on JD 750

[JoeJChin]

Looking for some help .

I have a JD 750 that i would like to take the injection pump out of .

Can i just pull it out , and as long as i don't change anything , and replace all the shims , just re-install it without worrying about changing the timing ?

thanks

Joe .

 

[jimdiesel1]

Yes, just keep everything clean and you will be fine.

 

[Barry 1]

You have to unhook the governor spring etc. first or it can easily be damaged.(internal) Take off the access plate to get to it.

 

[Willl]

Just curious Joe, why the need for removal ?

 

[JoeJChin]

I want to try and see if the rack ??/ plunger ? that controls the fuel flow is actually moving .
I had an earlier post about shutting the tractor down to re-fuel it , and not being able to get it started again
I did not run it out of fuel , just wanted to add a couple gallons before starting another job with it .

Tried several things to get it started again , including bleeding all the lines (several times) .

I don't seem to be getting any fuel to the injectors .

Looking in the tech manual to see if there was something that could have come loose in the linkage that contols the injection pump , shut off ???

I took off the inspection plate on the side of the engine , to see what linkages , springs , etc , move, when operating the throttle from shut off to full throttle.

There doesn't seem to be any movement on the rack(or rod) on the pump that takes it from full throttle to the shut down position ....

Thought i might be able to see if anything was stuck or broken when i shut it down to refuel it .

I can't think of any other reason that it wouldn't start back up , just kind of feels like it might be stuck in the shut off position .

I might be , (and probably am) way off base with this idea , but thought i would try and take a look , if it isn't to complicated.

thanks for the replies.

Joe

 

[JoeJChin]

Well
I pulled the loader off today so i could get a better look at the linkages inside .

Looking at the rack on the pump , it doesn't seem to move at all when moving the throttle lever from off to full throttle .

Not sure how much it is actually supposed to move , of if it might be stuck in the off position, or if something in the linkages is messed up .

Don't know where to go next .

Might just pull the pump and see if the rack moves when out of the machine .

thanks

Joe

 

[tlblv]

Hi Joe
Know it's been a while since you made this post. Just wondering the result. I also have a John Deere 750 that's having issue pumping fuel

 

[beenthere]

Hi Joe
Know it's been a while since you made this post. Just wondering the result. I also have a John Deere 750 that's having issue pumping fuel

Welcome to TBN

But best to send a PM to Joe, not rely on seeing your question. Click his forum name and you can send a PM as well as see when last active.

 

[thepumpguysc]

Personally I’ve never taken one off.. which is odd because I’ve done a lot of those pumps.. My guess is, they’re so easy to remove and install, no one needs my help..
Rereading the original post, I gather there’s an inspection plate that allows access to the pump linkage..??
The pumps control rack will sit in a “V” or a hole in the engine linkage..
Good luck and please let us know how it went..

 

[tlblv]

Thank you beenthere and pump guy .... I will PM Joe.
This is my first tractor and first diesel engine so I'm obviously a bit concerned about the process. Your comment pumpguy makes me feel a bit better. Either they just never need to be removed because they never break or it's so simple...

Can it really be as simple as removing the fuel lines, removing the 4 nuts and sliding it out the top?