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JD 68 Mower Possible Repower


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#1 KennyP OFFLINE  

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Posted June 07, 2018 - 05:56 PM

I have a JD 68 mower with a locked up 8 HP B&S. I have a 13.5 HP Intek with oil filter on a Dixon. The Dixon needs the drive system rebuilt. Thinking about seeing if that 13.5 will fit the JD. Make a cool little mower! Gonna have to measure things to see if it will physically fit. I hope the cranks are the same size! Any thoughts on this?


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#2 CRFarnsworth ONLINE  

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Posted June 07, 2018 - 06:36 PM

   Go for it. 

I swapped out an 8 h.p.  B/S for a 22 h.p. twin on an A.C. B208.   

Think..... Tim "The Tool Man" Taylor  and big block it! 


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#3 KennyP OFFLINE  

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Posted June 07, 2018 - 06:51 PM

I like the 68, cool little mower and about all I need. I hope I can put it back in service! Worst is whether the 13.5 will let the cover close over it.


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#4 TomLGT195 OFFLINE  

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Posted June 08, 2018 - 03:00 AM

:watch_over_fence:  any :camera: ?? 


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#5 KennyP OFFLINE  

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Posted June 08, 2018 - 04:54 AM

:watch_over_fence:  any :camera: ?? 

Not yet! Got to do the preliminary measurements to see if the 13.5 will even fit. Here's a file pic of the Dixon:

DSCN2374.JPG

 

And one of the 68:

Image005.jpg

 


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#6 SupplySergeant ONLINE  

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Posted June 08, 2018 - 07:18 AM

:watch_over_fence:

 

Sounds like a fun project!


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#7 KennyP OFFLINE  

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Posted June 08, 2018 - 08:04 AM

Did some measuring this morning.Two possible issues. #1 the 13.5 is taller. #2 the oil filter is gonna make me raise the mount height, making it taller yet. Otherwise, plenty of clearance.

Here's area view of the 68:

Image003.jpg

 

And here's a shot of the RH side. The oil filter will be in the area of the dipstick now. The 8 HP is set down into the frame about an inch. And the 13.5 oil filter is about a half inch above the mount.

Image006.jpg

 

Here's the RH side of the 13.5:

DSCN2375.JPG

 



#8 Sammoore13bolens1053 OFFLINE  

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Posted June 08, 2018 - 10:26 AM

Did some measuring this morning.Two possible issues. #1 the 13.5 is taller. #2 the oil filter is gonna make me raise the mount height, making it taller yet. Otherwise, plenty of clearance.
Here's area view of the 68:
attachicon.gifImage003.jpg
 
And here's a shot of the RH side. The oil filter will be in the area of the dipstick now. The 8 HP is set down into the frame about an inch. And the 13.5 oil filter is about a half inch above the mount.
attachicon.gifImage006.jpg
 
Here's the RH side of the 13.5:
attachicon.gifDSCN2375.JPG


I have a very clean example in this part of the world! One nice, one parts. 3 spare fibreglass hoods and a complete mower, two decks, one good, one bad. The good one I somehow bent a bit on, just need it straightened.

#9 TomLGT195 OFFLINE  

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Posted June 08, 2018 - 01:07 PM

Remote oil filter?


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#10 KennyP OFFLINE  

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Posted June 08, 2018 - 04:25 PM

This may be more than I want to try right now! I brought the Dixon up and got the engine off it.

DSCN3954.JPG

 

Here's the #'s for it.

DSCN3955.JPG     DSCN3956.JPG

DSCN3957.JPG

 

It's out!

DSCN3958.JPG

 

Brought the JD up and pulled that engine.

DSCN3959.JPG     DSCN3960.JPG

 

If I had the tools to measure the crank and cylinder, I might try a rebuild on it. It will turn over, albeit very hard! Otherwise, there is too much to change to put the 13.5 in it! I'd have to cut the old engine mount completely out and fab a new plate for this engine. The getting it set at the right angle. And figuring out where the pulleys need to be! Way more than a $50 mower deserves!



#11 TomLGT195 OFFLINE  

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Posted June 08, 2018 - 04:27 PM

What was wrong with the Dixon?


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#12 KennyP OFFLINE  

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Posted June 08, 2018 - 04:55 PM

What was wrong with the Dixon?

Drive system is all out of whack! Needs rebuilt and all new chains & sprockets! $300-500 rebuild!


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#13 KennyP OFFLINE  

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Posted June 09, 2018 - 05:25 AM

Also, The 13.5 HP has a shorter crank stub, so raising it will create more issues with getting the pulleys lined up.

 

Edit: The option to repair the 8 HP is still there. Just need to open it up and see if the crank is hurt.


Edited by KennyP, June 09, 2018 - 07:22 AM.


#14 KennyP OFFLINE  

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Posted June 09, 2018 - 01:07 PM

Well I found the issue. I got out early and power washed the mower engine bay and the engine. Pulled the head and it had some carbon build up.

DSCN3961.JPG     DSCN3962.JPG

 

Got brave and pulled the pan. Took the rod cap loose and no problems there! Crank was still hard to turn. Had to drive the crank out of the upper block. This is the reason it locked up.

DSCN3963.JPG     DSCN3964.JPG

 

I'm going to go get a brake hone and work the block some. A little Emory cloth to the crank. New seals, pan gasket and head gasket and run it til it blows!


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