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  #1  
Old 06-05-2010, 12:18 PM
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Butterbean Butterbean is offline
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Default Broken 126

My son and I just finished building a box blade from scrap (I'll post pics and a description later) and I was pulling my 126 in the garage. I heard a tapping noise under the hood. I pushed the clutch, idled it down and turned off the key. The engine continued to spin with no compression. I eased out the clutch with it in gear to stop the engine. I've heard engines "sling a rod" before. This was much quieter, maybe because of the heavy block. After removing and disassembling the engine, this is what I found.


According to the PO, I am the third owner and the engine has never "been into". If so, this is a very good track record for a 1971 tractor.

I've checked the cylinder bore, crank pin diameter, cam and crank shaft end play and cylinder head for flatness. All are within specs. Crank pin has some visible lines, but none can be felt. It looks like either the rod suffered from metal fatigue or one of the rod bolts loosened. 1 rod bolt was laying loose in the oil pan.

It may take a few weeks to get the money to order parts. That's one of the major problem with being disabled and on a fixed income.
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Charles Rodgers
Clinton, MS
1971 Cub Cadet 126
Serial # 382463
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  #2  
Old 06-05-2010, 01:37 PM
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Could have been worse! Rebuild it and get another 40+ years...
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  #3  
Old 06-05-2010, 06:02 PM
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Sorry, to hear that, Charles. You'll have your 126 going again.
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  #4  
Old 06-05-2010, 07:50 PM
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Some of you may remember a couple of years ago I posted some pics of my friends tractor and automobile graveyard. I called him this morning and asked if he had a K301 I could get from him. He said come on down and we'll look. Had to talk my wife into it since I'm still not able to drive. This is what we found.



The engine is a 1968 K301 from a 123. It's just sitting in my frame until I can clean off my work table. According to Carl, it was running about 5 years ago before his brother died. He has pulled parts from it to repair others, but never started this one after he parked it. He also said that his brother rebuilt it about 2 years before he died.

I'll pull the head and pan Monday to check it out, and hopefully have it running by the middle of next week. Best of all, it was free.
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Charles Rodgers
Clinton, MS
1971 Cub Cadet 126
Serial # 382463
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  #5  
Old 06-06-2010, 01:07 AM
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Glad you had a happy ending to your day, Charles!
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My Grandpa's Cart
Craftsman Lawn Sweeper
Craftsman Plug Aerator
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  #6  
Old 06-18-2010, 08:37 PM
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The free engine wasn't so good after all. When I pulled the head and saw .020 stamped on the piston, I started to get worried. Normally I usually don't go over .010" without putting a sleeve in. The crankshaft had .030 stamped on it and the rod had been machined for inserts. The bearing inserts were badly worn. The crankshaft pin measured 1.468". There is also a crack in the rod cap through the drilled hole. I just put the head and pan back on. I'm really not comfortable trying to use it.
Carl had another K301 he said I could have if I would come take it out. It was out of a 124 with a burned wiring harness. Got it home about 3 this afternoon and mounted it on the engine stand. When I removed the head, there was no carbon build up and anti-seize on the head bolts. I believe it had been recently rebuilt. The rod looks new and the crank pin measures 1.499". The only problem is the balance gears. There is excessive end play and slack in both balance gears. When I removed the lower gear, I found the stub shaft badly worn. The only times I've ever pulled the gears before was on a complete overhaul. I had hoped there was a way to remove the upper gear without removing the crank, but haven't been able to find it. If anyone knows of a way let me know. Otherwise, I will pull the crank Monday to get the gear out.
I really hope to have it running by next Wednesday. Cutting the yard with a push mower will probably kill me if I have to do it many more times.
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Charles Rodgers
Clinton, MS
1971 Cub Cadet 126
Serial # 382463
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  #7  
Old 06-19-2010, 12:50 AM
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Hope things work out for you, Charles.
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Allen
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My Grandpa's Cart
Craftsman Lawn Sweeper
Craftsman Plug Aerator
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  #8  
Old 06-24-2010, 06:29 PM
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Got the balance gears out and engine back together. The second "free" engine works great. Had to change out pto bearing and basket pulley. My son helped me put everything back together. We fabricated an electric lift from a used linear actuator. I got the actuator out of the trash. It was from a school bus recall. It operated the electric doors on the newer buses. It operates the box blade fine. Here are a few pics.





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Charles Rodgers
Clinton, MS
1971 Cub Cadet 126
Serial # 382463
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  #9  
Old 06-24-2010, 09:52 PM
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Great looking 126, Charles! Glad you got it back together.
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Allen
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My Grandpa's Cart
Craftsman Lawn Sweeper
Craftsman Plug Aerator
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  #10  
Old 06-25-2010, 03:40 PM
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Quote:
Originally Posted by Butterbean View Post
Got the balance gears out and engine back together. The second "free" engine works great. Had to change out pto bearing and basket pulley. My son helped me put everything back together. We fabricated an electric lift from a used linear actuator. I got the actuator out of the trash. It was from a school bus recall. It operated the electric doors on the newer buses. It operates the box blade fine. Here are a few pics.





How about posting all the numbers you can find off of that actuator? Brand, numbers the works! Please?
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You only need two things in life...duct tape and WD-40

If it's stuck and needs loosening, use the WD-40.

If it's loose and it's suppose to be stuck, use the duct tape.

Reply With Quote
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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