Massey 2675 fuel problems

[Andrew100]

This haying season, my Massey 2675 engine would slow down and stop in the field. We found air in the fuel pump and we blew out the two lines from the tank, checked every fitting, replaced the filters, and later installed a new fuel pump. Now, the engine will work for several hours and then quit and we find air in the line between the fuel filters and the injection pump. We can bleed the air out but we're back to the same problem of a tractor that quits anytime. Anybody got ideas about our next step? Thanks, Andrew

 

[Dieseltech]

Check the constant bleed fitting on top of the filter base, when that orifice is plugged any trapped air will go to the injection pump and cause shutdown. Line is usually
teed into the injector top return line.

 

[Andrew100]

Thanks. We removed the constant bleeding fitting and could see no dirt. Air is still building up under the bleed screw at the top of the injection pump. After quick bleeding, the engine runs fine at any speed for about an hour and then stalls unless placed at idling speed. At that low speed, it seems to run indefinitely. Both lines from the tank to the fuel pump have a rubber section: could they be kinking?

 

[Dieseltech]

Loosen the injection pump COVER bleed screw while engine is running, there MUST be good flow at that screw, if not either filters need replaced, or supply pump is bad, or
both. The injection pump will try to draw the fuel it needs, but engine won't run right without good flow from the filters and supply pump as system is designed for.

 

[Andrew100]

Massey fuel filters were replaced three weeks ago. When fuel lift pump was installed two weeks ago, tractor ran the round baler perfectly for about six hours. Now, only idles well and stops if throttle lever is lifted. When injection cover bleed screw is loosened with engine running, plenty of fuel comes out. However, we did notice that, in the middle of the top cover of the fuel filters, there is hollow bolt that has been repaired using a heli coil. Could that be a problem?

 

[jogl]

If that hollow bolt was leaking there should be fuel coming out there when running.

Starting to sound like you may have something in your fuel tank that is causing intermittent blockages. We had to take the tank off of our 2705 to clean it out. Symptoms were the same as you are seeing.

 

[Andrew100]

Thanks guys. Drained the tank. Discovered black sludge on walls and floor of tank plus floating blobs. Neighbour says tractor is prime candidate for "diesel algae", sitting out of use for most of the year: just haying for me and crops for previous owner. Cleaned out the tank with pressure hose and fuel tank cleaner. Have 300 litres (75 gal.) of diesel in plastic barrels. Should it be thrown out or can it be safely recycled with a regular 10 micron fuel tank filter?

 

[Jim.ME]

(quoted from post at 13:44:43 08/08/23) Thanks guys. Drained the tank. Discovered black sludge on walls and floor of tank plus floating blobs. Neighbour says tractor is prime candidate for "diesel algae", sitting out of use for most of the year: just haying for me and crops for previous owner. Cleaned out the tank with pressure hose and fuel tank cleaner. Have 300 litres (75 gal.) of diesel in plastic barrels. Should it be thrown out or can it be safely recycled with a regular 10 micron fuel tank filter?

The black growth (bacteria) forms in a fuel tank where the water and fuel meet at the bottom of a tank or barrel. Don't shake or mix it. You can use the fuel you have in storage if you filter it, especially as you get near the bottom. If you have any brush piles to burn you might consider using what is in the bottom of the barrels for that. A good cleaning of the barrels is warranted as well. Treat your tank and barrels with a biocide like Power Service Bio Kleen. Their Diesel Kleen can't hurt to add to the tanks of setting equipment or barrels.

If you are storing fuel from hay season to hay season you might want to consider buying fresh fuel each season, rather than trying to carry a lot over. Even sealed barrels can pick up moisture if setting outside due to expansion and contraction if water gets on top of them. YMMV