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Farmall & IHC Tractors Discussion Forum
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F20N Update/Questions

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Tony

11-29-2003 08:45:35




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A little more progress, and of course a few more questions. At this point, it appears that I have made the unconscious decision to tear the engine apart to figure out the cause of its continued lack of movement. Today, I removed the front engine mounting bolts and loosened the rear (so any slight raising or lowering of the front of the engine would not stress the rear mounts too much). I then set out to remove the front of the engine, so that I could get a better look at what may be going on there that could cause the engine to remain stuck. After removing a few of the bolts, I got to looking at the crankshaft pulley and concluded that I needed to tackle its removal before taking any more bolts out. Upon further inspection, I noted that the part upon which the hand crank engages has a screw set into it to hold it on the shaft it is mounted on. It also appeared that this had to come off first, before the pulley. Thus, I loosened the screw, but found that the part would not come off (did not try to force it). It also appears that after I get this part off, I will need to loosen the crankshaft pinion nut nut in order to go any farther.

My questions are as follows:

1. Am I right in my thinking that the pulley and the part that the had crankshaft engages against are two distinct pieces? I cannot find this part referred to in the parts manual, even though it is pictured with the pulley. Maybe it is just one piece? Any suggestions on how to get this off (knowing that it is or is not one piece will help)?

2. Am I right that after I get this part off, the next thing I need to do is remove the nut?

3. Any advance notice on what to do next will help.

As always, thank you for any help or encouragement you may be able to give. There are pictures to go along with the desription on my web page.

Thanks,

Tony

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Mike Androvich

11-30-2003 17:42:25




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 Re: F20N Update/Questions in reply to Tony, 11-29-2003 08:45:35  
The small set screw holds in place the crankshaft starting pin. It is a small miracle that you were able to get this screw out. Usually they have to be drilled out. The crankshaft starting pin is not a loose fit in the hole in the crank. You will have to take a drift pin, or a long punch and drive it out. Be careful not to hit the pulley with the hammer, you will take out a chunk of it real quick. The nut has a flat sheet metal keper on it to keep it from coming loose. Flatten the part that holds the nut in place and remove the nut with a socket if you can. Worst case is to loosen it with a chisel and hammer. After the nut is loose the pulley will normally pull off with a little persuasion. Sometimes you have to get a pulley puller to get it off. In any case, this has to come off in order to get off the timning cover. Also the front seal of the engine is right at this spot too. I have done this job many times, and it is usually not too hard. Good luck!

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Bill B

11-29-2003 15:50:26




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 Re: F20N Update/Questions in reply to Tony, 11-29-2003 08:45:35  
This may not be relevent in this case, but I feel the need to caution you on the set screw. Many years ago I was working in a stamping plant and had to remove a flywheel from a press. I loosened the set screw and started to remove the big nut when it bound up. I found that there were two set screws in the same hole, and the one I loosened was only a lock screw against the lower one that was doing the job. I had to remove the set screw entirely to get at the one below it, and also removed that one entirely. I buggered up the threads a bit, but it came off. I always check now, by removing the set screw entirely and looking inside.

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