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Old 12-04-2011, 08:29 PM   #1 (permalink)
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Homemade clutch puller tool idea

I've got an idea for making my own clutch puller for my '87/89 SRVs, but I thought I'd see what some of you more experienced snowmobile mechanics think. Buying a decent puller for this sled will run close to $40 with shipping. I'm currently breaking down my parts sled and it occurred to me I could modify the primary clutch mounting bolt for this purpose. It is the correct size and it's strong. I'm thinking that I could cut maybe 3/8" off the threaded end, grind down the remaining threads, and cut off the hex head. Then when I insert it, it should slide into the end of the crank shaft and end up recessed enough to thread an 18mm x1.5 hardened bolt into the end. Might put a little grease on the end of this bolt before tightening.

I've got the clutch bolt on the other sled already so I don't need that part. Plus I could buy a new one for $10 if I ever needed to. What do you think?
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Old 12-04-2011, 08:56 PM   #2 (permalink)
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That doesn't sound like a good idea could wreck the clutch or the crank or both. I would ask some friends or see if a dealer would take it off cheap or rent you the puller or just buy one $40 is alot yes but not compared to anew clutch or crank

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Old 12-04-2011, 10:07 PM   #3 (permalink)
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No that wont work! You would need an 18mm X 1.5 bolt about 4-6" long! And then a piece of drill rod or yourold bolt with the head and threads cut off! But trust me, I just broke 2 clutch pullers tonight! Buy a good one! And then put a coupla pumps of grease in first!
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Old 12-05-2011, 12:52 AM   #4 (permalink)
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Thanks for your posts, guys. Please tell me why it won't work. It's exactly the same thing as the clutch puller except that it's a two piece tool. The 18mm x 1.5 bolt only needs to be an inch and a half long.
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Old 12-05-2011, 01:39 AM   #5 (permalink)
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The clutch bolt you want to use as part of the "puller" will cock sideways, deform and cause you no end of grief. It is not of the same metallurgical quality as a good puller. If you don't want buy a puller for this one time use here is what to do:
1.Buy the aforementioned 18mm X 1.5 bolt- get one with as long a thread as possible. This is of course if you are sure the SRV has the ORIGINAL YAMAHA-COMET clutch. If it has an aftermarket Comet, which many DO HAVE this late in life, the thread pitch will be different.
2. Wrap the threads of this bolt with teflon tape (plumber's tape). Be sure to wrap it in the same direction as screwing a nut on the threads. Wrap it two or three layers the length of the threads.
3. Remove the clutch retaining bolt, tip the sled up on it's right side, prop it securely.
4. Fill the clutch bolt opening with tap water- IMPORTANT-leave 1/2" of thread exposed!!!
5. Thread the taped up bolt into the clutch- use an air impact on it. Hydraulic pressure will remove the clutch from the crank.
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Old 12-08-2011, 09:48 PM   #6 (permalink)
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Though skeptical, I took Irondog's warning about my homemade tool deforming under pressure seriously. I found that a length of 1/2" copper pipe was almost exactly the same OD as the ID of the clutch hole/gallery. Wrapping the bolt with a couple layers of electrical tape gave the pipe a tight fit.

I also decided to tap the end of the bolt so I could thread a long machine screw in for removal in case it didn't work. The 18mm x 1.5 pitch bolt cost me a little over $3. It worked like a charm.

Here's a picture:

]
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Old 12-09-2011, 07:28 AM   #7 (permalink)
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You might try this idea instead;
http://www.snowmobileforum.com/vinta...h-removal.html
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Old 12-09-2011, 08:18 AM   #8 (permalink)
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X2 on Irondogs method hard to beleive but using the water and wrapping the teflon tape on the bolt works great and is as simple as it gets!
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Old 12-09-2011, 08:42 AM   #9 (permalink)
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I just use the grease method, helps to loosen the tough rusted on ones!
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