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Valve timeing

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Glen Priddle

02-17-2002 06:09:37

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I have A TEA 20 it was in bad shape when I bought it the motor needed a rebuild when I took it apart I did a basic mistake I did not check the timeing marks on the the timeing gears . The tractor starts but will only run with the choke on The Carb is getting lots of fuel the compresion is good but it still runs lean . The carb ajustment screws are open all the way so I think is the valve timeing is not right how can I check this or set it right

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ZANE

02-18-2002 04:33:20

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Re: valve timeing in reply to Glen Priddle, 02-17-2002 06:09:37

Go to the cylinder which is next in the firing order.(on the ford N it will be #2) Remove the valve cover and when you rock the engine from right to left the intake and exhause valve should take turns opening. Do this just a few degrees off top dead center. If it does not rock the #2 valves evenly then it is not in time on the cam gear. If it does open and close the intake and exhaust valves on the #2 cylinder then you have trouble in the fuel system and not the valve timing.

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ZANE

02-18-2002 05:57:13

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Re: Re: valve timeing in reply to ZANE, 02-18-2002 04:33:20

CORRECTION TO THE ABOVE POST. I MEANT TO SAY THE THIRD CYLINDER IN THE FIRING ORDER WHICH WOULD BE #4 ON THE FORD ENGINE AND PROBABLY ON THE FERGUSON.

Put the #1 cylinder on top dead center of the compression stroke by removing the spark plug on #1 and rotating the engine clockwise as if you were hand cranking it and holding you finger in the spark plug hole. You will be able to feel the compression coming up. When you think it is at the top insert a piece of copper wire into the spark plug hole and make sure by turning the engine back and forth that the piston is at top dead center. On the 8N there is an inspection plate over a hole where you can see the marks for TDC on the flywheel if the flywheel is installed right. It can be 180% off if installed wrong. This hole is on the right side of the block.

Go to the cylinder which is third in the firing order.(on the ford N it will be #4) Remove the valve cover and when you rock the engine from right to left the intake and exhause valve should take turns opening. Do this just a few degrees off top dead center. If it does not rock the #4 valves evenly then it is not in time on the cam gear. If it does open and close the intake and exhaust valves on the #4 cylinder then you have trouble in the fuel system or the ignition system and not the valve timing.

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NCtim

02-17-2002 12:59:46

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Re: valve timeing in reply to Glen Priddle, 02-17-2002 06:09:37

Hi Glen,

Remove all the stuff on the front of your tractor so you can get to the timing gears. Put your engine so number one piston is TDC. Take off the valve cover. Rotate the cam until both valves in #1 are closed and #4 are just starting to open. This is the correct timimg.

Tim

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