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timimg chain jump

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Author  [Modern View]

07-16-2017 11:25:56

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What would be the symptoms of a timing gear jump due to worn chain? Would it start, run erratic or not start at all TIA.

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07-17-2017 03:47:37

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 Re: timimg chain jump in reply to PhilH, 07-16-2017 11:25:56  

My apologies this is for a TO30, is it then gear to gear thank you.

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07-16-2017 18:06:39

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 Re: timimg chain jump in reply to PhilH, 07-16-2017 11:25:56  
Only if you have a TEA-20 will it have a timing chain (if you are asking about a Ferguson).

Depending on how far it jumped, only 1 or 2 teeth, it may still start, probably be difficult to start, but will have a loss of power. It will eventually jump more.

If jumped more than a couple teeth, the starter will sound different, spin through faster because of low compression, will not start.

You can check the position of the distributor rotor. If the ignition timing is retarded (set the engine to TDC, the rotor should point to #1 or #4. If it's not there yet, it is retarded).

You can also rock the crank back and forth while feeling the cam resistance and watching the distributor. That will give some idea how much slack is in the chain.

If this is not a TEA, it will have gears. Very rare for gears to actually strip on these tractors. But when it happens, they won't jump a tooth, but will strip to the point the cam will stop turning. Usually a gear failure is a result of the governor coming apart and pieces of the ball cage running through the gears.

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welding man

07-16-2017 13:35:58

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 Re: timimg chain jump in reply to PhilH, 07-16-2017 11:25:56  
I have never seen a timing chain in a Fergie. Correct me if I'm wrong. I am replacing the camshaft in a 135 now. Nut cam loose on the end of shaft and destroyed the distributor gear. Governor ball retainer breaking apart and letting the distributor gear come out of mesh will cause the same symptoms.

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John Deere D

07-16-2017 15:27:10

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 Re: timimg chain jump in reply to welding man, 07-16-2017 13:35:58  


(1) Ferguson Parts Book:

(2) Ferguson: TEA-20 ..4 cylinder Gasoline Engine:

(3&4) Ferguson: TO-30 TO-20 TE-20 Continental Engine used in Various Fergusons:

(5)Massey Ferguson: 3 cylinder Perkins used in some MF 135's 35'S and other Massey Ferguson Tractors:

Bob.. Owner operator of a MF FE 35 X 3 cylinder Perkins....also Ferguson TEA-20 4 cylinder gasoline Engine with Timing Chain:

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welding man

07-16-2017 17:44:58

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 Re: timimg chain jump in reply to John Deere D, 07-16-2017 15:27:10  
Learn something new every day.That is one I have never seen in my close to 40 years of mechanic work and I probably never will see one either. I knew about the Standard Diesel chain but not the gas.

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07-19-2017 05:20:35

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 Re: timimg chain jump in reply to welding man, 07-16-2017 17:44:58  
My FE35 Standard motors petrol 87mm massey ferguson has a chain.

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John Deere D

07-16-2017 13:00:59

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 Re: timimg chain jump in reply to PhilH, 07-16-2017 11:25:56  
Make model of Tractor / Engine please.

Bob......Owner operator of TEA-20 Harry Ferguson:

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