mf 35 23c idling problem

[Flad]

I had a similar problem with a Leyland injector pump, The problem was the engine had been sitting for a few years and covered in oil, dust and mud, so out comes the pressure cleaner and de greaser , looked like new after the clean, It took a couple of weeks of part time other maintenance issues being attended to before trying to start the engine almost the exact same things happened.

Turned out to be water from the pressure cleaner had gotten in past the seal/ gasket on the rack top cover, and over a couple of weeks developed minor surface rust on the rack shaft obstructing the smooth operation of the shaft through the bushings on either end of the pump.
It was an easy fix just took the top off the pump, no need to remove the pump from the engine, cleaned the rust off the shaft ends, a few drops of oil new gaskets and seal and it was going in half a days work.

I might add that at the time I was close to going broke and couldn't afford to get the pump overhauled so I had little to lose, I learnt a valuable lesson in the process, that is to keep pressure cleaners away from around injector pumps and oil seals, it was an old 300 series Leyland diesel with an in line CAV injector pump.

 

[Jerry/MT]

I have a Ferguson with a Standard 23c diesel like yours, Hank, but boy is it different! My fuel injection system is a a totally different brand and I have no butterfly valve on the intake manifold. Does your tractor have glow plugs?
Mine also have no transmission oil filter.
Jerry's statements about transmission oil leaves me a little confused though. When I bought my tractor (used) back in 1985 it had SAE 90w oil (gear oil) in the transmission. It worked just fine for the 1000 or more tractor hours that I put on it. Not knowing any better, when When I overhauled the tractor in about 2008 or so I changed the tractor's transmission oil and put SAE 90w back in.
I have only put on 300 hrs since the overhaul (the old TO35 is just a spare these days) and the transmission and 3 point still work fine.
Now that I know it is the wrong oil, I am still not excited about changing it out, and if it was so bad, I would have seemingly had some problems over all these many years and many hours of use. Not sure what to do.

Cougsfan,

I didn't mean to confuse you. I wasn't recommending 15W40. You need to re-read my response to Hank on September 12th.

The 90w oil is not the "wrong oil". That was standard when this tractor was initially made and it's getting hard to find and some people thought they they could use "gear oil" which contains sulfur compounds. These compounds could effect some of the brass parts found in hydraulic pump. In lieu of using gear oils, some recommendations were made for substitutes to the hard to find 90 w mineral oil. It turns out NAPA carries these old oils via special order. Many people use regular what I call transhydraulic oils like Hygard, fluids that meet the Ford M2C134 spec oils, etc. Personally that's what I would use. They are readily available.
Several people referred to a report from a retired lubrication engineer IIRC that 15W40 motor oil met the viscosity spec and could be used. Several people on the YT forums tried this ad I never heard of any adverse occurances.
I hope this clears up any confusion regarding my response to Hank.

 

[HankStains]

Hi cougsfan, I think there might be a bit of voodoo regarding oil, been and bought the cheapest 15w40 oil i can buy, and it works great, thinking that as i don't have a filter i am gonna change the oil ever year, only 50 euros. Filtered the old oil i took from the 35 which was full of gear box teeth, from the fact that there is no clutch on the pto and in the past someone has forced the pto in to drive without stopping the engine first. anyhow, put the filtered and settled oil into the steering system of my case 580b and it works fine, before it had what was only like double cream, and it worked fine. just gonna change the oil very often. i am sure that any oil i put in now will be better than what was in there. good luck. i am sure there will be plenty of people who say that i am mad but hey, whatever!!