Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Bolens 1886 Engine Swap.


  • Please log in to reply
21 replies to this topic

#16 TokyoDrift99 OFFLINE  

TokyoDrift99
  • Senior Member
  • Member No: 59603
  • 80 Thanks
  • 112 posts
  • Location: Vermont, USA

Posted September 26, 2014 - 02:48 PM

Alright I tried it out when I got home from school. We are getting somewhere with this... It idles real nice with the throttle all the way to slow. If I move the throttle lever up a inch or so it goes way to fast and vibrates the whole thing like crazy. I think the vibration is from one engine mount bolt I forgot to tighten, because it is very hard to get to. I'll try to tighten that and test it again.



#17 Rock farmer ONLINE  

Rock farmer
  • Senior Member
  • -GTt Supporter-
  • Member No: 10759
  • 1,119 Thanks
  • 1,177 posts
  • Location: York Maine

Posted September 26, 2014 - 03:08 PM

That's good news!

Engines don't vibrate because their not bolted down tight.
They vibrate because something's out of balance.
I would check your drive shaft for bad "U" joints.

With the engine shut off of course!
Get under there and with a firm hand grip see if You can detect any movement in the drive shaft.
It should be solid.

Joe

#18 TokyoDrift99 OFFLINE  

TokyoDrift99
  • Senior Member
  • Member No: 59603
  • 80 Thanks
  • 112 posts
  • Location: Vermont, USA

Posted September 26, 2014 - 04:51 PM

That's good news!
Engines don't vibrate because their not bolted down tight.
They vibrate because something's out of balance.
I would check your drive shaft for bad "U" joints.
With the engine shut off of course!
Get under there and with a firm hand grip see if You can detect any movement in the drive shaft.
It should be solid.
Joe


This video shows the slop on the hydro input shaft. This isn't a u joint, the actual driveshaft flops all over the place on the input shaft of the hydro.


#19 Rock farmer ONLINE  

Rock farmer
  • Senior Member
  • -GTt Supporter-
  • Member No: 10759
  • 1,119 Thanks
  • 1,177 posts
  • Location: York Maine

Posted September 26, 2014 - 06:19 PM

Well, I guess you found the source of the vibration.
Hopefully, it's the drive shaft yoke and not the input shaft to the hydro that's worn.

To remove the drive shaft on my HT 23, I can back out the set screw that secures the key on the engine shaft.
Then slide the drive shaft back. You may be able to do the same. The hydro end just has a woodruff key and no set screw.

You may be able to get a machinist to sleeve that for you. Or just replace it with another yoke or shaft assembly.
Measure the length before buying a replacement. Bolens used different length shafts in different machines.

Incidentally I believe that should have a cooling fan on it?

Joe

#20 TokyoDrift99 OFFLINE  

TokyoDrift99
  • Senior Member
  • Member No: 59603
  • 80 Thanks
  • 112 posts
  • Location: Vermont, USA

Posted September 26, 2014 - 10:25 PM

Im pretty sure its the input shaft the is all pitted with rust, It looked pretty bad when I had the driveshaft off it. I have no chance of getting the u joint off the engine without taking it apart and using a puller. 



#21 Rock farmer ONLINE  

Rock farmer
  • Senior Member
  • -GTt Supporter-
  • Member No: 10759
  • 1,119 Thanks
  • 1,177 posts
  • Location: York Maine

Posted September 27, 2014 - 01:04 AM

The only other thing I can suggest.
Is to push the engine and drive shaft all the way back till the yoke is up against the hydro unit.
The engine and the engine mounting plate are both slotted.
That may lessen the vibration so that you can drive it around a bit.
Just test out other things until you can fix it.

I don't know what kind of job it is to replace that shaft.
I've never done it.
Take a picture of the shaft and start a new topic.

Joe

#22 TokyoDrift99 OFFLINE  

TokyoDrift99
  • Senior Member
  • Member No: 59603
  • 80 Thanks
  • 112 posts
  • Location: Vermont, USA

Posted September 27, 2014 - 09:17 AM

The only other thing I can suggest.
Is to push the engine and drive shaft all the way back till the yoke is up against the hydro unit.
The engine and the engine mounting plate are both slotted.
That may lessen the vibration so that you can drive it around a bit.
Just test out other things until you can fix it.
I don't know what kind of job it is to replace that shaft.
I've never done it.
Take a picture of the shaft and start a new topic.
Joe

The holes aren't slotted.




Top