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View Full Version : Kawasaki 24hp What size crankshaft bolt?


HenryB
08-27-2010, 07:44 PM
The crankshaft bolt that holds the clutch on has fallen off anyone know the bolt size?

Restrorob
08-27-2010, 07:53 PM
Most are 7/16"X 24, Length depends on equipment manufacturer and clutch brand used.

HenryB
08-27-2010, 08:05 PM
It's a Fastcat Pro 61 (Bobcat) Also is there a spacer or bushing between the bolt and clutch?

Restrorob
08-27-2010, 08:22 PM
Henry,

Disregard the size I posted above.

Get me the model and serial numbers off this machine and I'll look up exactly what you need, There's two different sized bolts depending on model number.

HenryB
08-27-2010, 08:36 PM
942405F Thanks

Restrorob
08-27-2010, 08:55 PM
No problem Henry,

You need a 7/16-20 X 2 1/2" long, The only thing shown is #9 being a lock washer. Now, If the hole in the clutch is larger than the head of the screw then the clutch washer/sleeve has fallen out of the center of the clutch. Most of these washer/sleeves are a interference fit so shouldn't have fallen out.


http://i107.photobucket.com/albums/m314/Restrorob/Misc/BobCatClutch.jpg

HenryB
08-28-2010, 07:46 AM
Any idea what size the crankshaft is "1" or 1 1/8. I think there was a spacer/bushing the bolt slides through?

Restrorob
08-28-2010, 08:29 AM
This is the washer/sleeve I'm speaking of, This centers the outer bearing on the clutch to the crankshaft. It's part of the clutch and I've never seen them sold separately, Regular washers will not work they wont keep the bearing centered.


http://i107.photobucket.com/albums/m314/Restrorob/Misc/PTOClutch.jpg


Did the clutch drop down off the crankshaft while mowing when the bolt dropped out ?

I've seen two machines this season do this, When the clutch dropped down the outer bearing came off the crank. This bent the friction disc spring straps in one and broke three in the other bending the rest, Both clutches were trash and had to be replaced.

HenryB
08-30-2010, 05:34 PM
Got the piece today. Bolted up nice and tight but seems to have a little too much vibration. Any idea what would cause this?

Restrorob
08-30-2010, 05:52 PM
Did the clutch drop down off the crankshaft while mowing when the bolt dropped out ?


Henry, You didn't answer my question ?

Check the belt for any flat spots in the 'V' area.....

HenryB
08-30-2010, 07:13 PM
Henry, You didn't answer my question ?

Check the belt for any flat spots in the 'V' area.....

Sorry about that. No the clutch never came off just the blades were disengaging intermittenly.

Restrorob
08-31-2010, 08:46 PM
Did you find any problems with the belt ?

When you went to put the new bolt in the crank the clutch was all the way up on the crankshaft ?

HenryB
08-31-2010, 08:54 PM
Belt looked good so did the pulleys. Clutchis in tight. Maybe I tightened the bolt too much in the crankshaft I used the airgun. Maybe this is pressing the clutch bearings too much?

Restrorob
08-31-2010, 09:27 PM
Well, I've never ran into binding from over tightening.....But I've never over tightened one either.

Loosen the bolt then tighten it by hand until you start turning the engine, Then go another 1/3 to 1/2 turn with your air gun. Loctite on the threads would be helpful too.