580C Case back hoe

[walter shea]

My 580C back hoe will run for up to 10 min and then it sputters and emits white smoke... if I let it sit for a few min, it will start up again and begin the same cycle.. sometimes it will run longer... I"ve cleaned all fuel lines inc screen at injector pump w/the exception of the return fuel line.
Any ideas?
Thanks

 

[Penn]

There is a restrictor in the return line elbow that screws into the pump,remove and clean it.
P

 

[walter shea]

Thanks for suggestion. I cleaned the return line, elbow, screen - added 2 new fuel filters & new fuel.. still acting the same but worse - now runs full throttle less than 30 sec and dies out. Could the fuel pump in the injector pump be going bad?

 

[DWF]

A friend of mine has a 580C and just went through the same problem. He checked all the obvious things to no avail. He talked to a Case dealer who said the pump needed to come off for repair. Dealer suggested a pump shop. Friend called the pump shop and ended up sending the pump to them. Got it back and never ran so good. (he has had it for 8 years)
DWF

 

[Jim Conley]

Try this before you spend a lot of money. Remove the elbow for the return line coming from the top of the pump and hook the line in without the restrictor. Did this to mine and now it runs great.
Was broken down about 5 miles from the main road.

 

[Dennis K (WA)]

Sounds like the check valve in the return line that has been mentioned. The return line must be clear. Try blowing air through it if possible. Also make sure the tank is venting. I can't remember if it is in the cap or a separate vent line. Good luck.
Dennis