Case 580C 207 Engine fuel problems

[Jim Conley]

I have a Case 580C loader backhoe, it started losing power then finally stalled out. Let it sit for 2-3 minutes fired back up. Changed filters, runs fine for 30 seconds then dies. Let it sit for 1 minute then fires back up for the same. Bled injector when it ran one time for about 15 minutes. getting plenty of fuel from tank to top of injector pump. pull screen assembly from pump had very small pieces of ??? in it. when it does crank it runs like a champ then stalls out. Fuel cut off is aligned correctly. My next step is to try and get a screen/regulator assembly from Case.
Any input would be great. Even took regulator assembly apart and cleaned. Case manual says it could be a sticking rack BUT they didn"t include any thing in the manual about it. HELP
Thanks
Jim Conley
Palatka Florida
P.S. No problems prior to this. and no strange smoke or noises other than it just dying.

 

[Anonymous-0]

Remove the return line from the injector pump (and the fitting) and see if it runs good. There will be some diesel flowing out of the pump when you do this. If the fitting or return pipe is pluged up, it will produce an hydraulic lock and the pump will run out of fuel even if it is full of diesel.

 

[Camboted]

You, may not believe this, and it may not be your problem, but it's true! My brother has an International truck that had the same problem. It turns out there is a bacteria that grows in diesel fuel and once it starts in your system it will continually plug up stuff until you take off the fuel tank, filters, ect and clean them with disinfectant then purchase a chemical additive that kills the crud, use it for a while until the system is clean.

 

[Anonymous-0]

sounds like algae to me...take the tank off and have it steam cleaned and check with a boat store or truck stop...most have additives to prevent regrowth but its the prolonged sitting that allows it to grow...either in the tractor or in the fuel storage tank.

 

[Anonymous-0]

Algae/diesel bacteria will look like black slime - not little chunks. Those little pieces look like mouse turds? If you pull the timing window off the side of the pump, or pull the top cover from the pump - you'll probably see a lot more. It's a common pump problem resulting from a broken governor weight retainer ring. It's made of plastic and over time, gets brittle and flies to pieces. When it does, the machine will keep quitting and acting like it's out of fuel. Once it dies and sits for a moment, it will start right up again.
The pieces get stuck in the housing-pressure-regulator-valve on top of the pump where the return fuel line hooks. You can ream it out and make it run better for awhile - but eventually the pump needs to get fixed or you'll ruin it. It's the fitting getting plugged that makes the machine quit.
You don't need Case for parts, it's a Stanadyne/Roosamaster pump.
Anybody that knows their way around rotary pumps can take it apart and fix it in an hour for $25-$50 in parts.

 

[dwag]

A plugged return as suggested is probaly your problem. Take off the rectangular window on side of pump and check for chunks of rubber. You'll also find trash by removing return fitting. Gov retainer is made of plastic/rubber material and breaks up with age, Time to pull the pump and repair. Very common problem an Roosa Master Pumps.

 

[Jim Conley]

It was the little check valve thing with the glass ball. My dad removed it and connect return line in it"s place. Runs great.
My next question is.
What is the glass ball for and will it hurt to run without it?