I picked up a used PK motor for my F 3 that gave up the ghost. Only problem is the flywheels are not the same. On the old Athearn's Blue Boxes I remotored I just pry them off, I was not worried about the old motors.
Any tips or just He Man it?
I was using Liquid Nails to attached the old flywheels. Guessing the same would be OK? This is the only Proto I had to repair so I am looking for advices.
Ken
I hate Rust
I have pullwd Athearns off just as you have. I had to pull some Atlas flywheels once and needed to build a small puller to do it without damaging the motor. It seems like I pulled flywheels from a Proto a while back with nothing more than a good pull. I did not pry them as I did not want to damage the motor or shaft.
Dan
I use a piece of vinyl tubing that is big enough to slip over each flywheel. I then use two pairs of Channel Lock pliers and grab hold of of each flywheel and twist. The vinyl tubing prevents grooves being formed in the brass from the flywheels.
Will
Ken;
Ideally a small puller that will grab on to the flywheel and push against the motor shaft.
Prying between the flywheel and the motor house will damage the bearings.
I was able to pull the ones off a Kato-motored Atlas by twisting. If you're lucky, they both break loose and you can get them both off. If only one comes off, pliers on the now empty motor shaft to hold it and then twist the remaining flywheel. When putting them back on, support the free end of the motor, do not rely on the motor bearings to hold while pressing the flywheel on. I've not had a problem with them being too loose afterwards, but I've only ever put the same ones back on, not repalced them or used a different motor with a potentially different shaft diameter. A drop of CA secures them good enough to prevent slippage, but usually can be broken loose if they ever have to come off again.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
I am embarrassed to say it took longer to type the question than to get the flywheels off? Gaped and twisted one one came right off. Took my track nippers and but between the motor and flywheel and it pooped right off! It took maybe 15 seconds to do both.
Just tried the replacement motor, it not going to be that easy. Time to look for the vice grips
Thanks for all the answers.
I've read that an NWSL gear puller will work. Also here's a link on how to make your own.
http://www.instructables.com/id/Cheap-and-Simple-Gear-Puller/
Springfield PA