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Discussion in 'Mechanic and Repair' started by HenryB, Aug 27, 2010.
The crankshaft bolt that holds the clutch on has fallen off anyone know the bolt size?
Most are 7/16"X 24, Length depends on equipment manufacturer and clutch brand used.
It's a Fastcat Pro 61 (Bobcat) Also is there a spacer or bushing between the bolt and clutch?
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.
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.
Any idea what size the crankshaft is "1" or 1 1/8. I think there was a spacer/bushing the bolt slides through?
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.
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.
Got the piece today. Bolted up nice and tight but seems to have a little too much vibration. Any idea what would cause this?
Henry, You didn't answer my question ?
Check the belt for any flat spots in the 'V' area.....