Yanmr 1401 Flywheel

Post your questions or problems you are haviing with your Yanmar tractor here.

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warburtonplayer
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Yanmr 1401 Flywheel

Postby warburtonplayer » Mon Dec 28, 2020 12:22 pm

I received all my parts for the clutch replacement I just pulled the tractor apart and go the ring gear off the fly wheel to replace that. I also changed the throwout bearing, I went to put the pilot bushing into the flywheel and the hole is completely wallowed out because when I took the clutch disk off the old pilot bushing was in four pieces laying on the fly wheel. My question is should the pilot bushing have any amount of play on the clutch shaft or should it be tight? I am trying to locate a flywheel from home now.I

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Re: Yanmr 1401 Flywheel

Postby Aaron » Mon Dec 28, 2020 1:33 pm

The bushing should not be tight on the shaft (shaft needs to spin easily) but should not be wobbly either.

If the rest of the flywheel is in good shape you could have a machine shop bore the center out a little and make a custom bushing to fit it.

warburtonplayer
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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Mon Dec 28, 2020 2:08 pm

I will try the machine shop and see what they can do

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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Mon Dec 28, 2020 2:34 pm

The hole on the backside of the flywheel is 3/4 and tapers down toward the engine side. DO you think I will be able to have it machined for a new bushing. It would have to be a really large bushing

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Re: Yanmr 1401 Flywheel

Postby Aaron » Mon Dec 28, 2020 2:43 pm

I don't really see why it would not work. 3/4" is really not that big of bushing. They would just bore the flywheel out and make a new brass bushing that would press fit into the flywheel and the inside to fit the shaft.

warburtonplayer
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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Mon Dec 28, 2020 3:44 pm

I just got off the phone with the machine shop and will be dropping off tomorrow for them to put a sleeve in it and make a bushing. Thanks for the help

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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Fri Jan 08, 2021 10:37 am

I just got the tractor back together with new clutch, throw out bearing, and pilot bushing had the machine shop they bored the hole out and put a sleeve in it. Everything is back together now my question is I have adjusted the clutch all the way and it has no more adjusted its all the way out it is way lower than 3/4 of a inch before it catches. Any thoughts since it is a 1401 is the adjustment and different. The clutch feels fine when the tractor is going through the gears.

winston
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Re: Yanmr 1401 Flywheel

Postby winston » Fri Jan 08, 2021 2:02 pm

Nothing bent allowing the pedal to come further up than normal? Sounds like you are fully engaged with clutch pedal out and if no grinding when shifting then I would just go for it.

warburtonplayer
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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Fri Jan 08, 2021 2:11 pm

Yeah everything is fine no grinding but the pedal has about 3 1/2 -4 inches of play before it engages and I know it should be way less than that. The pedal does not have any resistance from the clutch until 3 1/2 -4 inches down. The rod is only 5 inches I think it should be longer only about 2 1/2 inches of threads are on it.

winston
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Re: Yanmr 1401 Flywheel

Postby winston » Fri Jan 08, 2021 2:34 pm

Wow, that is way to much. Did you follow these instructions? https://www.hoyetractor.com/clutch.htm or watch this video? https://www.youtube.com/watch?v=HVb58N- ... =emb_title

warburtonplayer
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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Fri Jan 08, 2021 3:00 pm

Yes I have watched the video and done multiple clutch jobs on yanmar and John Deere tractors and it really seems that the linkage is way too short. I think I am going to weld a piece at the base and it will be good to get the extra length. All I need is about 2 1/2 more inches on the rod and it should be perfect to give me the extra length.

warburtonplayer
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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Fri Jan 08, 2021 3:01 pm

Also it is a one piece linkage I would be interested to see anyone else on the forum could measure the linkage on their 1401 to see what it should be.

winston
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Re: Yanmr 1401 Flywheel

Postby winston » Fri Jan 08, 2021 6:15 pm

Just curious, how much free play before changing the clutch? Just looking at the parts drawing it would seem it is about the size you describe.

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Re: Yanmr 1401 Flywheel

Postby warburtonplayer » Fri Jan 08, 2021 6:51 pm

Before I changed the clutch was worn and I thought it had been adjusted all the way. Currently the end of the threads the fork is only treaded on three threds it was the same way before I changed the clutch. I am sure that this is not how it should be as it is now there is no more adjustment the fork will fall off the rod.

winston
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Re: Yanmr 1401 Flywheel

Postby winston » Sat Jan 09, 2021 4:41 am

It would seem adding some length to the linkage might solve your problem but I am still mystified about your problem. Keep us informed of your progress.

The 169 is about the same size as your 1401 and clutch linkage looks very similar. A page out of the repair manual showing adjustment tolerance's ust for pondering.
2021-01-09-045214.jpg
2021-01-09-045214.jpg (138.67 KiB) Viewed 146 times


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