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November 28, 2014, 01:34:11 AM *
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 1 
 on: November 26, 2014, 07:54:45 PM 
Started by Robert Barbour - Last post by Blake Malkamaki
It sounds like you have a nice tractor there Robert. Good thing you pulled the pistons out though.

As far as traveling, I agree with you, I'm sure he had an easier time than today. During World War 2, he traveled all over in regard to the MG-1s - he had unlimited gasoline ration stamps, and sometimes had an MP ride on each fender when he was entering a base or restricted zone. Later on, he traveled troubleshooting tractors. He preferred to fly, probably in the 50s on DC-6 or Constellations for long flights; DC-3s for short hops, and maybe even single engine planes to get into the really remote areas. When he went to Guatemala to put several OC-18s back into service building the Pan-American highway, he flew into a small airport where they picked him up in a car, then a Jeep, then by mule way up into the mountains. His biggest regret was that my grandmother hated to travel and would never go with him. He wanted to take her back to some of the best places he had been.

 2 
 on: November 26, 2014, 12:14:06 AM 
Started by Robert Barbour - Last post by Robert Barbour
Blake, I bet your Grandpa had a much nicer time travelling that we do today!!
I have been working on the OC 6.  Got the engine all apart and what a pleasant surprise!!  It had been rebuilt shortly before it was parked.  The inlet and exhaust were well sealed and the engine was clean inside.  It has had the crank reground to .010 undersize and it looks and measures like new, the bearing are great too.  The valves and guides are good too.  The bores are clean and no sign of the ridge.  The pistons are not the best though all the rings are stuck except the chrome top ring and the pistons are corroded in the ring area from sitting.  The other odd thing is the wrist pins are quite loose, so they did not do a good job fitting them on the last rebuild.  On the rebuild they installed 3.5" sleeves.  All the engine kits I see advertised are 3 5/8 or 3 3/4 so I may have to get a 3 5/8 kit if I can not find 3 1/2 pistons rings pins and bushings.
The other interesting thing was the gas tank.  It had a wooden plug in it instead of a cap.  The tank was right full of water, however it is in good shape once emptied and flushed out.

 3 
 on: November 25, 2014, 11:49:23 PM 
Started by ryeep15 - Last post by Robert Barbour
On that valve measure the head diameter, stem diameter and the length of the valve and post here.  I have some herc valves laying around and may have one.

 4 
 on: November 25, 2014, 11:29:17 PM 
Started by ryeep15 - Last post by Blake Malkamaki
I don't know an exact fit, but lots of times valve sizes are shared with many different engines. Get precise measurements and run around to some speed shops or good engine building machine shops and see what they have laying around. Also big truck and tractor dealer shops. If you find something, let us know. I've always wanted to compile a cross-reference listing of what parts will fit from other machines. Of course, time is always my issue.

I do know Mack V-8 engine valves (don't know which V-8) will fit a 28-50 Hart Parr. And John Deere M valves will fit a Caterpillar Ten. All from personal experience.

Blake

 5 
 on: November 25, 2014, 11:14:40 PM 
Started by ryeep15 - Last post by ryeep15
So we finally got the head checked out and found a crack/hold in the #6 cyl area. So that is being repaired. But the exhaust valve for that same cyl looks pretty bad. Anyone have any suggestions on coming up with an exhaust valve??

 6 
 on: November 24, 2014, 10:21:05 PM 
Started by erik - Last post by Blake Malkamaki
What's the idea?

 7 
 on: November 24, 2014, 06:52:58 PM 
Started by erik - Last post by Doug424
Waste of time and aluminum, in my opinion. Looks like a junkyard piece was the original, note the missing front idler and section of track. If you were to spend that much time, I would think you would make one thats at least complete and original.  I guess I just don't get "art"

 8 
 on: November 24, 2014, 06:47:59 PM 
Started by canada bob - Last post by Doug424
Be sure you have good fuel supply to the carb. Besides that, those Marvels are about as simple as a carburetor can be. I usually take a pump oil can with light oil or diesel fuel and pump it through all the openings to be sure they are clear.  Assuming everything is clear, you might just have to open  the fuel setting a turn or so.

 9 
 on: November 24, 2014, 02:22:07 PM 
Started by erik - Last post by hotratz
Amazing amount of work. I would have just spray painted the original one with some silver paint  Grin

 10 
 on: November 24, 2014, 09:59:52 AM 
Started by erik - Last post by erik
I donīt know about you but I like to visit art galleries and exhibitions on my spare time when not chasing odd crawlers. This weekend I went to the Moderna Museet (Museum of Modern Art) in Stockholm Sweden to see the exhibition Sculpture after Sculpture with works of Katharina Fritsch, Jeff Koons, and Charles Ray. To my big surprise I stumbled on real size aluminium model of a Cletrac by artist Charles Ray. The artist spent several years dismanteling a real Cletrac and made clay models of every part including interior engine parts and recast them in aluminium before putting everything together again. An incredible work but in a way a vaste of time.
Regards
Erik

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