Gary Dotson
501 Club
That tractor is going to have some real Purdy insides!
Picked up a John Deere BO at auction
- Thread starter cjet69
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cjet69
501 Club
My plan is to get it running and drive it around to see what else it needs before tearing down to paint. I will be doing some paint on the engine block and the inside of the front casting. That way I won't have to tear it down so far when I do paint.
ricky racer
501 Club
Fingers crossed!!
cjet69
501 Club
Cleaned and primed the cast iron rocker cover. I was trying to figure out how the rocker arms were oiled and found these older B's have a tube from the governor that feeds oil to a metal trough riveted into the top of the rocker cover and that drips oil on the rockers through small holes. The newer B's have a oil tube and line bolted onto the rocker assy.
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Gary Dotson
501 Club
I really enjoy machine work being performed!
cjet69
501 Club
Got more info on the oil tube for the rocker shaft. The governor housing has a cast in oil trough that catches oil slinging around in the governor. That gravity feeds to the rocker cover where it feeds another trough that drips oil onto the rocker shaft. It has a separate breather tube that goes to the air intake.
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cjet69
501 Club
Pulled some push rods out of a parts tractor and got them wire brushed. Ran the flex-hone thru the bores. I can still see some pitting in the worst cylinder. It will have to do for now. And took one pic of the head with the valves sitting in place.
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cjet69
501 Club
Yesterdays project. I didn't have any nuts for bolting down the head on the BO so I went out to the parts B to see what I could find. Decided while I was at it to pull the head and block out. Head came off with no problem but the block is putting up a fight. One piston is stuck pretty good and the crank won't turn. I pulled the rod cap off of the stuck side figuring I could pull the block out with piston and rod still in it. Well that side the crank is sitting up so that the rod hits the cam before the rod bolt clears the crank so it won't come out. I tried knocking the rod bolt out but it also hits the cam before it comes out of the rod. I think this is going to be a complete tear down in order to get it aparts so it will have to wait. I did get the nuts that I am looking for. The head surprised me as all of the valves are free. I think it will get a good cleaning and maybe touch up the valves and put it on the shelf.
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cjet69
501 Club
Today I pulled the valves out of the parts B head and they look to be in great shape. One seat has a little rust spot but won't know if it can be saved until we do a valve grind. Weather is supposed to get better so I can get outside and wash up the head and block for the BO to get ready for assembly.
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cjet69
501 Club
Managed to get the crank turned enough to get the block out of the parts B tractor with the stuck piston. Stuck the block in the press and the piston came out with little effort. I think a lot of the problem was the starter was engaged in the flywheel and it was froze up pretty bad. I cleaned the top of the rusty bore with a 3-stone spring hone and then ran the flex hone thru both bores. I think it could be run the way it is now. I planning on pulling the crank out so it doesn't sit and rust. Should have all of the parts for a running engine for a late styled B.
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Sure is helpful to have a parts tractor. Progress every day!
cjet69
501 Club
Even when they are not in the same years some of the parts do interchange.
ricky racer
501 Club
The oil pump screen looks scary!
Was there much of a ridge at the top of the cylinders?
Was there much of a ridge at the top of the cylinders?
cjet69
501 Club
I agree, that screen is about as plugged as I have seen. Not much wear but I haven't measured. This has .045 over pistons and the valves look new with no wear. Might have been gone thru not long before it got water in it.My cousin bought it and let it sit for 5 years and sold it to my dad where its been sitting another 13 years. Might have been an easy fix when my cousin first got it.The oil pump screen looks scary!
cjet69
501 Club
My brother came over and made some adjustments to the rotary broach and wanted to try it on something. Used the parts B head to test as it had some dings in the gasket surface that needed to be taken care of. It worked great. I had a couple broken manifold bolts in the BO head. One I drilled out perfectly the other not so much. Got a Time-Sert kit for it and installed it today. Worked out good. This is open to the water jacket so it needs to be sealed good.Now all of the machining and repairs are done on the BO block and head so now I can get them washed up good.
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ricky racer
501 Club
On my Cub, I Heli-Coiled every head bolt hole. I was amazed at the small amount of thread engagement each bolt hole actually had. With the seemingly small amount of thread engagement and the fact that the threads were in cast iron, I was worried (knowing my luck) I'd strip the threads in the block. I figured the Heli-Coils would be less prone to stripping out than the cast iron block. I never had one leak and never stripped any holes out. 