Anvil 9 #1 Posted June 13, 2019 To All, you have helped me with many items I have been working on with my 1991 WH 520. Here's another question. I have had a problem with the starter not engaging the flywheel at times so I had the starter rebuilt. Bench testing works great. Same condition still happening. I took a look at the flywheel and the ring gear is pretty beaten up on the leading edge. I'm not sure what a new ring gear looks like but is it possible to reverse the ring by removing it from the flywheel and reinstalling it with the fresh side facing the starter? I'm not sure if the drive side of the gear comes beveled when new. Any thoughts? Share this post Link to post Share on other sites
bc.gold 3,406 #2 Posted June 13, 2019 (edited) 13 minutes ago, Anvil said: To All, you have helped me with many items I have been working on with my 1991 WH 520. Here's another question. I have had a problem with the starter not engaging the flywheel at times so I had the starter rebuilt. Bench testing works great. Same condition still happening. I took a look at the flywheel and the ring gear is pretty beaten up on the leading edge. I'm not sure what a new ring gear looks like but is it possible to reverse the ring by removing it from the flywheel and reinstalling it with the fresh side facing the starter? I'm not sure if the drive side of the gear comes beveled when new. Any thoughts? Chalk the bad spot on the flywheel then remove the gear then advance it 45 degrees from your chalk mark. The teeth on the ring are square cut on the backside and have no lead ( beveled face ) for the Bendix gear. Another inexpensive fix would be to have a welding shop tig weld metal back onto the worn teeth then you could file the profile back onto the gear teeth. To remove the ring gear use a flat faced punch with plenty of surface area and work your way around the circumference on the first round the gear should advance about 20 thousands of an inch, repeat until the gear comes off. To reinstall you'll need to heat the gear up. Edited June 13, 2019 by bcgold 1 Share this post Link to post Share on other sites
Anvil 9 #3 Posted June 13, 2019 Thank you bcgold. I had that suspicion. I'm shopping for a replacement ring gear or a used flywheel. I'm also guessing the old point type flywheel would be different than the solid state ignition system I have on the '91 machine. Any truth to that rumor? Share this post Link to post Share on other sites
ericj 1,579 #4 Posted June 13, 2019 new ring gears are available from onan parts.com and there is also another, or use to be another vendor on here that that supplies onan parts, but I can't remember his name. If you are coming to the big show I could possibly bring you a used flywheel. I'll have to check to see if I have a good used one and then figure a reasonable price for both of us. good luck pm me if interested in the flywheel eric j 1 1 Share this post Link to post Share on other sites
The Tuul Crib 7,339 #5 Posted June 13, 2019 I would be a little concerned welding on the fly due to the magnets on it . Not sure what the current would do to it. Share this post Link to post Share on other sites
bc.gold 3,406 #6 Posted June 13, 2019 2 minutes ago, The Tool Crib said: I would be a little concerned welding on the fly due to the magnets on it . Not sure what the current would do to it. The ring gear is first removed for the tig weld, also with tig the heat zone is very localized. Share this post Link to post Share on other sites
The Tuul Crib 7,339 #7 Posted June 13, 2019 1 minute ago, bcgold said: The ring gear is first removed for the tig weld, also with tig the heat zone is very localized. Ok l wasn’t sure if you could do that. Cool! 2 Share this post Link to post Share on other sites
VinsRJ 723 #8 Posted June 13, 2019 Keep in mind that the welded tooth/teeth will be a different hardness than the original... this will then probably cause premature wear of the starter gear on the starter... IMO bad flywheels or starter gears = one thing... replacement Share this post Link to post Share on other sites
bc.gold 3,406 #9 Posted June 13, 2019 14 minutes ago, VinsRJ said: Keep in mind that the welded tooth/teeth will be a different hardness than the original... this will then probably cause premature wear of the starter gear on the starter... IMO bad flywheels or starter gears = one thing... replacement Those that know the property's of steel can work their magic with it. Share this post Link to post Share on other sites
Anvil 9 #10 Posted June 13, 2019 Thank you all for your input. By the way, when and where is the big Wheel Horse Show. If close enough it might be do-able. Share this post Link to post Share on other sites
ericj 1,579 #11 Posted June 14, 2019 11 minutes ago, Anvil said: Thank you all for your input. By the way, when and where is the big Wheel Horse Show. If close enough it might be do-able. the show is in Biglerville Pa June 20 th - 22. Located at the south mountain fair grounds. Thur and Fri is the best days to come if you can eric j Share this post Link to post Share on other sites
