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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 255

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Rodney Brassfie

05-18-2008 10:59:13




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I have a 255 and am having trouble with it starting of late. Did start in two turns. Got to where it would just clic at the solenoid. I put in new battery ( checked again to see if it was good) did not cure problem. New cables also added large enough to carry juice. It has a lucas starter and soleonid. Had hard time finding one and at a starter place an old fellow said he could get one with no problem. He got me one for my MF from a new Holland and new solenoid. Only had to change out nowe peice. I saw him check in the shop and it would about jump from the vice. I put it on to no avail. (It will start sometimes when you short across the starter. It will not engage the starter from the starter, just spin. You then might try to start with the key and it might start. (or not more often than not). I talked with the starter person and he said that ther was a burr on the flywheel. That may be true and not let the starter engage. I don't know why there is only a click at the solenoid and not spinning of the starter. I have jupmed the switch and have jumped the safety switch and it may start and think I have it until the next time. I shorted it at the starter yesterday while turning the key yesterday and it started, but don't know if that is the problem. It almost acts like the ground, but have the same ground that I have always had and it always started. I would sure appreciate any information that would help me back to running. Need to spray pasture. I will be happy to email any other information that might help someone that can get me going. Thank you in advance. [email protected]

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DavidP, South Wales

05-18-2008 11:16:03




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 Re: MF 255 in reply to Rodney Brassfield, 05-18-2008 10:59:13  
Hello Rodney,
The burring on the flywheel teeth is a real possibility. When you turn the key the solenoid is energised which moves the pinion to engage with the starter ring. Only at engagement does the starter begin to turn. Most engines stop in one of about three or four places. Tooth wear is normally far more pronounced at these points. Assuming that no damage has occurred to the starter pinion try to start in the normal way but turn the engine by hand just under one quarter turn first. You will turn the flywheel to a point where the teeth should be 'good'. If this does not work, remove the starter and mark the flywheel with a piece of chalk or similar and turn it very slowly using a screwdriver. Look very closely for wear or damage on the teeth until you see your mark come round.
I would also suggest making up a wire with a 6mm spade terminal on one end. Touch the other to the battery cable to try to start. This way you by-pass all of the key and safety switch wiring.
It's very unlikely but also check for any run-out in the flywheel, just in case its loose.
Cheers
DavidP, South Wales

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Rodney Brassfield

05-18-2008 18:22:32




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 Re: MF 255 in reply to DavidP, South Wales, 05-18-2008 11:16:03  
David, thanks very much for the helpful informaion, but not sure what you meant about the flywheel there at the last, not being a mechanic. Could you explain? Thanks!



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DavidP, South Wales

05-19-2008 00:17:26




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 Re: MF 255 in reply to Rodney Brassfield, 05-18-2008 18:22:32  
Hello,
Yes, my thought was about the slight possibility that the 6 bolts which hold the flywheel to the flange an the crankshaft might be loose and cause mis-alignment of the teeth. You would effectively have two gears running out of line.
Yes, the time difference is relevant but I normally check the lostings several times a day so the delay is usually at a minimum.
DavidP, South Wales



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MF#1

05-18-2008 18:50:58




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 Re: MF 255 in reply to Rodney Brassfield, 05-18-2008 18:22:32  
I'm not as knowledgeable as DavidP but I 'think' he means the bolts that hold the flywheel to the crank could be loose, letting the flywheel wobble and causing an 'engagement' problem.(He may not see this till much later due to his location overseas, ~5 hours ahead of the east coast)



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