W6k Posted June 10, 2020 Report Posted June 10, 2020 I have a M20F that has some corrosion of the main gears. I want to remove them, have them media blasted and if Ok then powder coat them. There is a spring assist that has to be removed. How do I do that? Quote
N201MKTurbo Posted June 10, 2020 Report Posted June 10, 2020 2 minutes ago, W6k said: I have a M20F that has some corrosion of the main gears. I want to remove them, have them media blasted and if Ok then powder coat them. There is a spring assist that has to be removed. How do I do that? Remove the gear door links and the tire, put the gear up, take the bolt out of the little link on the end of the spring. wrap some lock wire around the end of the spring and a big screwdriver. Pull and remove the bolt. 1 Quote
N201MKTurbo Posted June 10, 2020 Report Posted June 10, 2020 I have the official special tool for this. It is worthless.... Quote
47U Posted June 10, 2020 Report Posted June 10, 2020 I had my main gear out and found it easier to get it apart than to get the spring/link/bolt back together. I ended up hooking a ratchet tie down strap to the spring so that the link would be free, and putting the other end of the strap around substantial structure (I don’t remember exactly what) and cinching the strap up until I got the hole in the link lined up and the bolt installed. With the gear supported in the up position by a length of 2x4, it’s soooo close, you’d think it would be easy. Not so much. I entertained using the quarters/washers method, but I’m not one to do things the easy way, so my comptroller says. tom 1 1 Quote
W6k Posted June 10, 2020 Author Report Posted June 10, 2020 Excellent responses. Thanks for the info. I did hear about placing coins between the spring coils. Anyone try that? Sounds too simple. If I have to use a come along to stretch the spring I don’t know where I would attach it in my hanger. 1 Quote
tmo Posted June 10, 2020 Report Posted June 10, 2020 I believe the coins method is what U47 refers to as the easier way out he did not take. I believe what happens is you place appropriately sized coins / washers / etc between the coil to prevent it from contracting. When you lower the gear, the things fall out and you're home free. 1 Quote
Pasturepilot Posted June 10, 2020 Report Posted June 10, 2020 I just did this with mine using the quarter trick. Get a big pocketful of quarters (or thick washers) and open the inspection panel outboard of the gear. Insert coins between the coils of the spring, and have someone unlock the gear. As it retracts, the spring would normally compress but the coins block that and it’ll fall totally slack. easy, peasy. A tip: count the coins you use. My springs have decades of LPS3, corrosionX and dust coating them so the coins didn’t fall out freely when I put it all back together. Some stuck in the spring, and were difficult to see. I stuck a screwdriver blade or ratchet extension into the center of the spring and was surprised when I kept hitting coins I couldn’t see. 1 Quote
carusoam Posted June 11, 2020 Report Posted June 11, 2020 You can see why 47U’s comptroller didn’t allow for the use of a good stack of capital... It might not all come back... Best regards, -a- 1 Quote
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