Massey Ferguson 265 Starving for fuel

Mcgeeter

New User
Hello, I have a Massey Ferguson 265 that is giving me fuel problems - I serviced the fuel system & changed the fuel filter & bled the air out of the system and started the tractor and everything was normal ( ran fine ) My brother started bush hogging and made several passes and all of a sudden the tractor lost power and went down to 1/3 throttle and then idle and it just cuts off.
It will start back up and it goes to 1/3 throttle or less and will not hardly pull out of its own tracks. I suspect that the lift pump may be bad but not sure and wanted someone else's opinion - I checked fuel flow from the fuel tank to the lift pump and the fuel flow is good there. It just acts like its starving for fuel.
Thanks for your help, Clary McGee :?:
 
How long ago were the AIR filters changed? Hoggin stirs up a lot of dust.
When it only runs at 1/3 throttle have you tried to manually pump the lift pump to see if it will even out or speed up?
If it's not the lift pump then the injector pump could need some attention, Dieseltech is the man you need. Maybe he'll chime in soon.
 
I checked the air filter and even took it out to eliminate it as being the problem which made no difference at all - We took a hand held leaf blower & cupped the outlet of the blower over the fuel tank to pressurize the fuel system with the tractor running and this made no difference either - This is the way we bleed the air out of the fuel system also and it makes it super easy and quick when changing the fuel filter. Thanks for the helpful comments, Clary McGee
 
This is another thing I noticed when I tried to bleed the fuel system at the fuel injection pump the system bleeds out fine at the upper bleed port on the injection pump but at the lower bleed port I only get a trickle of fuel - I do not see any air bubbles but I do not get a steady stream like at the top bleeder port. The unit has a Perkins 4 cylinder engine with a CAV fuel injection pump.
 
What is make of new filter?
Is it fram?
A local contractor told me he fitted a new fram
diesel filter to his jcb handler and there was a big
drop in power so he fitted a different make filter and
full power returned, since then I have avoided fram
filters
 
Did you by chance use a WIX type filter having a groove with 4 slots in it around the top? If you did, and a gasket was installed or slipped into that groove it will restrict and can even totally block the fuel flow. I would recommend checking that first. It is a common thing to have happen.

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Edited to correct fuel flow direction through filter for this system. Jim


This post was edited by Jim.ME on 08/24/2021 at 11:58 am.
 
a similar thing happened on our 65 after changing the fuel filters. turned out the culprit was that the old rubber o-ring inside the top of the filter assembly(where the bolt goes through) wasn't removed, and then a new o-ring was doubled up on it. this was enough to block most of the fuel flow. Went crazy trying to figure out the problem. Thought it was the lift pump as well, replaced it, took pretty much the whole fuel system apart before figuring out that the o-ring was the issue. not sure if the filter setup is the same on the 265, but our 65 was also a Perkins with a CAV pump.
 
Thanks for your comment, I was thinking that this issue may just be something as simple as that because the issue did't start until right after the fuel filter change but the only thing that gets me is that it ran just fine just after the service and even made a few strong passes with the 6 foot bush hog before it started this issue.
 
Hello, My brother bought a Tractor Supply fuel filter that was part # CAV7111/796 is what we used and now we have a Napa made by Wix part # 3166 same as Wix 33166 but have not installed it yet - I will update if this fixes the problem.
 
Hello, Thanks for your comment - I never use Fram filters on any of my equipment or vehicles - Mostly try to stick with Wix brand filters. My brother bought the Tractor Supply fuel filter that we installed in place of a Wix part # 33166.
 
Thanks for your comments and very good pictures about using Wix filters - I usully use Wix brand filters but my brother bought a
Tractor Supply replacement and we used it. It was a # CAV7111/796. We have a Wix to replace it with but have not done that yet. I
will repost a comment if this fixes the problem.
 

If it is a CAV7111/796 the top should have a number of holes for the fuel to exit through. They can not have the same problem with the gasket the WIX type can have.
 
Thanks for your comments and very good pictures about using Wix filters - I usully use Wix brand filters but my brother bought a
Tractor Supply replacement and we used it. It was a # CAV7111/796. We have a Wix to replace it with but have not done that yet. I
will repost a comment if this fixes the problem.
 
Round 2, there are two shafts that are on the top cover of the injector pump. With the engine off ensure that the throttle shaft has full range movement, Idle to Max. Then ensure that the fuel cutoff cable also has full movement from Off to Run. I've seen where the cable clamp loosens and the lever doesn't get full movement. Have you looked into the fuel tank with a flashlight? I pulled a yellow plastic nozzle from inside the tank once but you could have a leaf, piece of plastic, who knows, blocking the inlet. When it was running and mowing after the filter change did any of the fuel lines weep or leak? Could be letting in air and losing prime. Lastly, there should be a return line on the tank, has it been checked for flow? Had one on a 245 that came loose and it ran rough then stopped.
IF none of the suggestions fix the problem you may be looking at an injector pump rebuild:-(
 
Thanks for your comment, I have checked at the injector pump for full movement of both throttle control & the engine shut down control in the run position and off position - The weather here has really been too bad to do any more checks here lately but my next step is to drain the fuel which is not a whole lot out and check the inside of the fuel tank for trash and possibly remove the fuel shut off valve from the tank and check it to see if it may possibly be restricted.
 
Good info, but backward. The top outer groove is the fuel INLET, and the fuel comes back up the center clean for the injection pump. The CAV 7111 296/796 filters work the
same way, center is the clean fuel passage after fuel has gone down through the other top holes.
 
Thank you, I stand corrected if the flow goes that way on the MF. I had checked a JD by pumping the transfer pump on a JD with the filter off and the center feeds the filter and on those the slots are the outlet with the bleeder screws in the chamber above the slots on those. Different housings, so the flow is apparently different.

Picture has been edited to correct the flow for this system.

This post was edited by Jim.ME on 08/24/2021 at 11:59 am.
 
Could an Oil ring on cav71111/796 filter starve one for fuel? My husband has bled the air from all the lines. It will start using starting fluid but won't run.
 

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