MF 245 - fuelling issue

[Shadow24v]

Im working on fixing a 70's vintage MF 245 diesel with the perkins 3.152 3 cylinder engine for my boss.

initially it started with a fuel filter change hoping to clear up a miss and lack of power. Monday was spent mowing with a brush hog for 4-5 hours (miss still present) until the tractor started losing power and rpms. it bounced back a couple times before dying on me. I was unable to get it restarted. I was able to get it started yesterday after actuating the primer on the transfer pump for a while. Even though it started, it is running worse than previous, like it is down a cylinder or 2. there is no smoke, white or black, which leads me to believe that it is a fuelling issue.

What i can't determine is whether it is the transfer pump or the injection pump/injectors. I do suspect the initial miss is due to a bad injector on the front cylinder. Is there any way to tell what might be causing this issue? i have a transfer pump on order already that should arrive monday, but if that doesn't work, i really don't want to tell my boss he has to drop $1000 in parts unless im POSITIVE it is what is needed.

Any advice would be most appreciated!

 

[Diamondpilot]

If you can get it running you should be able to feel the difference on what cylinder are firing. I have not done so before but have heard you can feel next to the injector base and see which cylinder is not firing.

Chris

 

[Farmwithjunk]

The initial description (Motor fading in and out...loosing power) sounds VERY much like a transfer pump diaphram failing. That'll allow air in the system. The PErkins AD3-152 burns fuel so sparingly, it takes FOREVER to clear air out of the fuel system by any other means besides bleeding. And then with a bad diaphram, you're still getting air IN.

I'd start by rebuilding the transfer pump. Kits aren't at all expensive, and a decent MF/AGCO dealer will have them on the shelf. Even a new pump isn't too pricey.

THEN bleed the main pump (Both lower AND upper bleed screws) and FINALLY bleed injectors (and lines).

It's a PERFECT time to change filters and clean screens BEFORE fighting this battle also.

 

[Noel Chartier]

Hi, I have a 275 and have fuel coming out the bleed screws on the injector pump but nothing coming out the injector lines to the cylineder. Can you help?