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Cox 010 TeeDee crankshaft removal
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Cox 010 TeeDee crankshaft removal
Hi
I am restoring an 010 engine. There is corrosion on the prop driver and I want to replace it and clean the crankshaft.
I can easily hook the piston arm and pull the pin off the crank once the fuel tank is off and get the arm out of the way. Do I need to remove the cylinder to take out the crankshaft? I am planning to use a padded vise and prop screw to press out the prop driver rather than hit it with a hammer.
Thanks
Jamie
I am restoring an 010 engine. There is corrosion on the prop driver and I want to replace it and clean the crankshaft.
I can easily hook the piston arm and pull the pin off the crank once the fuel tank is off and get the arm out of the way. Do I need to remove the cylinder to take out the crankshaft? I am planning to use a padded vise and prop screw to press out the prop driver rather than hit it with a hammer.
Thanks
Jamie
Weaponizer_57- Beginner Poster
- Posts : 9
Join date : 2023-06-19
Re: Cox 010 TeeDee crankshaft removal
Be very careful of the .010 Cox engine. The cylinder is easily distorted, I know from experience. Heat, the Cox wrench fully inserted in the exhaust ports and patience. Remove the fuel tank and the prop drive washer and lock, and the intake first. Unscrew the cylinder then angle and remove the connecting rod/piston. A drop of oil on the cylinder/head helps. But heat is the key if it's difficult. Then tap out the crankshaft. Everything carefully.
You can remove the prop drive washer by first removing the cylinder/piston connecting rod by heating and carefully tapping the prop screw/nut back (I sit the assembly on a solid surface and use a very light tapping hammer) then just lift out the crank shaft.
![Cox 010 TeeDee crankshaft removal P1016764](https://i.servimg.com/u/f43/19/15/28/33/p1016764.jpg)
But.........If it's just corrosion you're worried about, I would attempt to clean it first with Alcohol or Marvel Mystery oil and a brush then soak the assembly in alcohol and lubricate. Disassembling the little .010 is asking for trouble unless your accomplished.
So much effective cleaning can be done just by immersing the engine in alcohol and flipping it over CC and CCW many times.
You can remove the prop drive washer by first removing the cylinder/piston connecting rod by heating and carefully tapping the prop screw/nut back (I sit the assembly on a solid surface and use a very light tapping hammer) then just lift out the crank shaft.
![Cox 010 TeeDee crankshaft removal P1016764](https://i.servimg.com/u/f43/19/15/28/33/p1016764.jpg)
But.........If it's just corrosion you're worried about, I would attempt to clean it first with Alcohol or Marvel Mystery oil and a brush then soak the assembly in alcohol and lubricate. Disassembling the little .010 is asking for trouble unless your accomplished.
So much effective cleaning can be done just by immersing the engine in alcohol and flipping it over CC and CCW many times.
rsv1cox- Top Poster
Posts : 10928
Join date : 2014-08-18
Location : West Virginia
Re: Cox 010 TeeDee crankshaft removal
The easiest way to remove the prop drive plate is to unscrew the aluminum collet with the toothed part of the stock COX wrench, and the collet will push the diveplate off the crankshaft end...if otherwise you do not want to remove the shaft, even the cylinder need not be removed either..this is the safest way I have ever managed, nothing is forced or jeopardized.. cleaning the shaft can be done simply by spraying e.g. brake cleaning fluid into the carb and rotating the shaft a few times..I would not disassemble an 010 unless absolutely necessary..it is easy to damage it and almost impossible to find replacement parts other than the glow head and carb parts..cylinder and piston are unobtanium...I see one combo on ebay at a price that will buy you a pre-owned full engine.
balogh- Top Poster
Posts : 4852
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: Cox 010 TeeDee crankshaft removal
This is great advice. Yes very small, fragile, valuable and old.
I can pull the connecting rod off the crankshaft pin with a small plastic hook and no force. I am thinking to just push the piston up out of the so the connecting rod is clear and change the crankshaft/drive plate with the cylinder left in place.
Ever done this?
I can pull the connecting rod off the crankshaft pin with a small plastic hook and no force. I am thinking to just push the piston up out of the so the connecting rod is clear and change the crankshaft/drive plate with the cylinder left in place.
Ever done this?
Weaponizer_57- Beginner Poster
- Posts : 9
Join date : 2023-06-19
Re: Cox 010 TeeDee crankshaft removal
Old stock 010-s with the red delrin carb body and black carb came with taper cylinder bore, meaning, that unless the engine is overly worn, the piston will stick at the top dead center and the rod end may still hang into the crankcase, thus hindering the shaft removal..make sure the rod is cleared from the crankshaft's way so as not to jam them together when pushing the shaft out.
balogh- Top Poster
Posts : 4852
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: Cox 010 TeeDee crankshaft removal
rsv1cox wrote: Cox wrench fully inserted in the exhaust ports
We need to be a little careful with this statement when working with the uninitiated. It's not their fault if they don't follow the terminology, but this could be easily mistaken for meaning stick the wrench into the port, which we know will spell disaster and may easily ruin a cylinder.
The wrench needs to be inserted across the face of the exhaust port, not inserted into it. Even the "correct" method can do damage.
I'll try to find a picture to show what I mean.
Oldenginerod- Top Poster
- Posts : 4000
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria
Re: Cox 010 TeeDee crankshaft removal
I prefer to obtain a prop screw preferably a allen socket screw the same size as the shaft threads. I find a nut that fits onto the prop screw and I obtain a large washer. Place the new prop driver on the shaft, washer on top of it and screw the prop screw with nut in place into the shaft. Make certain your prop screw is in by a fair amount and now back the nut down onto the washer. Use a allen key to hold the prop screw and with a small wrench back the nut off which will press the drive washer onto the shaft. It will install the driver square whereas other methods will leave it cocked and it will wobble.
Ken Cook- Top Poster
- Posts : 5573
Join date : 2012-03-27
Location : pennsylvania
Re: Cox 010 TeeDee crankshaft removal
That is a great technique. Thank you. I will do it that way..
And yes. I know not to stick anything into the exhaust ports.
And yes. I know not to stick anything into the exhaust ports.
Weaponizer_57- Beginner Poster
- Posts : 9
Join date : 2023-06-19
Re: Cox 010 TeeDee crankshaft removal
As a personal technique, I super-cool the crankshaft before installation.Ken Cook wrote: I prefer to obtain a prop screw preferably a allen socket screw the same size as the shaft threads. I find a nut that fits onto the prop screw and I obtain a large washer. Place the new prop driver on the shaft, washer on top of it and screw the prop screw with nut in place into the shaft. Make certain your prop screw is in by a fair amount and now back the nut down onto the washer. Use a allen key to hold the prop screw and with a small wrench back the nut off which will press the drive washer onto the shaft. It will install the driver square whereas other methods will leave it cocked and it will wobble.
After you restore the crankshaft, rub in some light machine oil to thoroughly cover the crankshaft.
Throw it in the freezer for 3-4 hours, (more time for larger shafts.)
When ready to install it will be sufficiently shrunk.
This allows the drive plate to more easily align with the knurling, and less pressure is required to press the drive plate in place.
Mudhen- Gold Member
- Posts : 489
Join date : 2011-09-19
Re: Cox 010 TeeDee crankshaft removal
I will do that as well.
Weaponizer_57- Beginner Poster
- Posts : 9
Join date : 2023-06-19
Re: Cox 010 TeeDee crankshaft removal
great idea mudhen @Mudhen as to chilling the crank to make pressing on the drive plate easier
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Yabby- Platinum Member
Posts : 711
Join date : 2021-06-08
Location : Yorke Peninsula South Australia
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