Massey Ferguson 1100 Diesel Injector/Fuel Problems

Ross Tieken

New User
I've owned this tractor for several years, and it always ran well. About 5 months ago, I would start the tractor, work for a while, and then all of a sudden, the engine would race up to 2500 RPM, sputter just a bit, and die. I couldn't get it started again until the next day. I'd prime it with the lift pump lever, bleed it, etc... and it would start. It's gotten worse over time. I've replaced the lift pump, filters, fuel lines, have very little sediment in the bowl, am getting fuel to the injector pump. Read on the Forum that the Thermometer might have something to do with uneven heating, so I replaced that. When it runs, it purrs along. Then, sometimes it's 5 minutes, sometimes 35 minutes, sometimes just idling, sometimes at full (540 PTO RPM) throttle, the engine races, and dies. When this happens, it seems I can't get it started again until it cools/overnight. Re-prime, do it all again. CAV injector pump... can they "slowly" go out? I know I'm getting fuel, and can't find a leak anywhere, no bubbles, no air in the filter cups, nothing. Is it just an old (looks original) injector pump that is slowly going out, or ??? IT'S DRIVING ME CRAZY! Help is appreciated. Thanks, Ross
 
Engine racing and then stalling indicates air getting into the injection pump somewhere. After all that's been done I'd check the constant bleed orifice fitting on top of the filter base, when it gets plugged trapped air then goes to the injection pump, instead of to the injector return and back to the tank. Happened to my brothers 1105 years ago, drove us nuts until we found it..
 
"Engine racing and then stalling indicates air getting into the injection pump somewhere. After all that's been done I'd check the constant bleed orifice fitting on top of the filter base."

I've looked on the internet with little to no results, can you describe the "constant bleed orifice fitting"? Is it on the injector pump, or the filter housing/base? So, you're saying that if air is getting into the line, somewhere, this orifice is supposed to release it so it doesn't mess up the injector pump? Am I reading that correctly?

Sure appreciate the help. My sanity depends on it!
 
The constant bleed orifice is on top of one of the filter bases, and usually has a small line that goes up to the injector top bleed off line. On my 165 it's a banjo type bolt, but a straight fitting is used on the six cylinder models. Take the small line off, work the hand primer, if open fuel will shoot out. If it's plugged any trapped air that should get out will go to the injection pump, causing shut down. Bleeding the system gets it going awhile, but usually not long. A good way to test the supply pump is with the engine running, loosen the injection pump COVER bleed screw. A good pump will shoot fuel out. The supply pressure on the system is the same at the pump inlet and return. When the supply pump begins to fail, it's usually one of the check valves has come loose. Neighbor's White Perkins supply pump died recently, was found by loosening the cover bleed screw..
 
I'll take a look tomorrow and see what I find. I'm getting good fuel supply to the injector, loosening that screw spews diesel all over the place. The fuel pump was recently replaced and seems to be working well.

You've been a great help. Let me see if I can figure it out and I'll let you know.

Thank you, so very much,
Ross
 
Have heard of something like this, turned out to be a plastic bag in the tank. Right after it stalls next time, check fuel flow at the inj pump. If no flow, take a wire with hook and fish around the outlet on the tank. Neighbor had a curly que of plastic and some junk get into the fuel line and it had got right up the filter neck and stop fuel flow. HTH's Lee
 
O.K., so I have a MF 1100, and the injector pump is vertically oriented. I removed the lines that connected the pump to the fuel filters, two of them to make sure they were clean and clear. I then removed the orifice from the top of the Injector Pump, to make sure that it was clean. It was also. I'm getting excellent fuel flow from the lift pump...diesel sprays out when cranking it over. Reassembled it all, went well, but when I went to bleed the lines to each cylinder, I can't even get any diesel to piston #6 anymore. I'm just thinking about replacing the whole injector since I'm getting fuel, but not running. Your thoughts?

While on the subject, I can find injector pumps that are labeled for MF 1100, with a number DPA 3263 F670, BUT on my injector pump, it says it's a DPA 3263 670C. What is the difference between the F670 and the 670C ? It has the right MF part number, but the gentleman I spoke with didn't know if the F and C were interchangeable or not. I can't find the 670C designation anywhere on the internet. Any idea why/what the designation means, that the C is compared to the F ?

The Set number is SR63/900/6/2350.

So, that's where I am. Help is greatly appreciated.

Thanks,
Ross
 
Any chance of getting a regulating valve for the CAV DPA 3263. I don't remember there being a spring, or the spring shot out and I can't find it. Either way, I think the injector is useless unless I can find the regulating valve to replace the old assembly.

Ross
 
On my Injector Pump, the part number is CAV DPA 3263 670[b:044921ae24]C[/b:044921ae24]. All the sites on the web sell a CAV DPA 3263 [b:044921ae24]F[/b:044921ae24]670 for my MF 1100. I can't find anywhere on the web where the p/n is listed as a 670[b:044921ae24]C[/b:044921ae24], they all say [b:044921ae24]F[/b:044921ae24]670. I was told that the p/n's had to match up exactly. What in the world is the difference between the 670[b:044921ae24]C[/b:044921ae24] and the [b:044921ae24]F[/b:044921ae24]670? Are they interchangeable? Or, can I use the [b:044921ae24]F[/b:044921ae24]670 since it seems to be the number recommended for this tractor? I can't find anyone that has the parts for the regulating valve. Even the rebuilders are scratching their heads. Anyone?
 
You have an early 1100 that has a quill drive injection pump. Late models were changed to the heavier uprate drive hub. I'm not convinced you have injection pump trouble, if you like call me some evening at five seven four eight three five 3292. I have some questions about what's going on.
 
I'll definitely give you a ring. In the meantime, if it is the pump, do I just have to get this one, the 670C, rebuilt? Or, can I use the new one, the F670?

I'll definitely give you a call before I make a move.

Thank you,
Ross
 

Hi Ross.... Your problem may not be to serious. Remove your fuel tank drain plug and there should be a filter screen on the end of it. If your screen is missing or dirty that could be your problem. I don't really know how to explain it very well but that plug threads into where fuel is drawn up from the tank.
I had the same thing happen to me 2 winters ago. At first it behaved like it was either out of fuel or plugged filters and stalled. I put more fuel in and bled it out and it ran for 20 minutes and then the same thing again. I then changed filters and a lift pump. It ran for 15 minutes and then shut down.

I phoned my dad who has been with Massey tractors since 1962 at his shop and he told me to check this plug and screen. They are all supposed to have that screen around the plug and mine was missing, how it ran as long as it did I will never know. I replaced the screen and bled it out and started it and left itrun in the yard for 2 hours. No more problems, This may be a simple and cheap fix.
 
That screen is missing on my tractor. I took the plug out to wash out the tank, and noticed that the screen shards were sticking out of the plug, but no screen. I'll take a look and give it a try. What the heck... Perhaps this is the simple answer! Thank you, Ross
 
Hi Ross........That screen fits on the end of the plug and when you thread the plug into the tank, the end of the screen should slip over that fuel line inside that sucks up the fuel.

I had that happen during the winter and of course the coldest day of the month yet. Let me know how you make out and good luck.


Darren (1105)
 

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