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Farmall & IHC Tractors Discussion Forum
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adjusting valves on H

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Curtis E

07-23-2007 16:37:09




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I have had the head off the old H.I will be honest I dont really know what I am doing.Looking for someone who knows how to adjust the rocker arms,a good web site,or just some really good detailed information would be greatly appreciated.Thank you




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Wayne in MN

07-23-2007 20:18:21




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 Re: adjusting valves on H in reply to Curtis E, 07-23-2007 16:37:09  
Valve adjustment process—Farmall 4 cylinder: Firing order 1-3-4-2
1. While slowly turning the engine with the crank, watch when #1 cylinder (front one) exhaust valve closes and #1 intake valve starts to open. That is when the piston is at Top Dead Center (TDC). Note: the timing pointer should be lined up with the I I mark (double line) on the front pulley.
2. Rotate the crankshaft exactly 1 rotation to put the #1 piston at TDC again with both valves closed and ready for adjustment. Adjust the valve to rocker arm clearance so the feeler gauge has a slight drag as you pull it out. (check specifications for correct amount) Be sure to tighten the lock nut!! Note: this is where you can set ignition timing also.
3. With both valves set on #1, rotate the crankshaft ˝ turn and #3 cylinder will be in position to adjust it’s valves. 4. One more ˝ turn of the crank and #4 valves can be adjusted. Note: the timing pointer will be at the I I mark again.
5. Once more turn the crank ˝ rotation and #2 valves can be set.
6. Re-check all lock nuts, install a new gasket, and you are done.

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riverbend

07-23-2007 17:54:33




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 Re: adjusting valves on H in reply to Curtis E, 07-23-2007 16:37:09  
I would suggest that you buy and read a manual for this tractor. The I&T or Operators Manual will give detailed instructions on how to adjust the valves and other mainatenence proceedures that you will need to do if you are going to use your tractor. I got both of them.

Greg



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El Toro

07-23-2007 17:23:38




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 Re: adjusting valves on H in reply to Curtis E, 07-23-2007 16:37:09  
You need to remove No1 sparkplug near the radiator and hold your thumb over the plug hole while someone hand cranks the engine until you feel compression against your thumb. Then have them slowly keep cranking until the notch on the damper is aligned with the pointer. Remove your distributor cap and your rotor should be pointing to the No1 plug tower. Then you can adjust these valves counting from radiator end of the engine.
1, 2, 3, 5 then crank the engine until your rotor
points to No4 plug wire. The notch on the damper should be aligned with the pointer and then adjust
4, 6, 7, 8 to .020" Cold. Hal

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Tom Windsor

07-23-2007 20:07:03




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 Re: adjusting valves on H in reply to El Toro, 07-23-2007 17:23:38  
Hal..just rechecking...isn"t it .017



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El Toro

07-24-2007 03:47:31




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 Re: adjusting valves on H in reply to Tom Windsor, 07-23-2007 20:07:03  
It is .017" if the engine is hot. Hal



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