Join Date: Nov 1999
Location: Arroyo Grande/SLO, ca usa
I have rebuilt them before. I have found that it is easier to press the new outer housing into the motor first before loading any gears, then load the gears one level at a time. If you try and load all four levels of gears at the same time, then you have to hit the motor shaft dead-on or you'll have a bear of a time getting it to slide over the motor shaft. The successive levels of gears grip into the outer housing so well it makes it difficult to turn the tiny center gear that goes over the motor shaft if you try to install the whole gear package at once.
The first gear package closest to the motor is obviously the hardest to get in by itself because it teeters back and forth while you install it. But, try loading one level of gearing at a time and I'll bet the pedestal will eventually end up flush with the plastic gear housing.
Instead of rivets on the pedestals, I'm using flat head bolts with tiny aircraft nylon nuts on top.
I have taken four broken or seized motors apart so far. All tend to have rust and pitting on the bottom arm shaft where it passes through the big brass bushing. Only one had an internal gear tooth break and that motor ended up frying the whole nylon motor armature before it toasted the bulb fuse under the black plastic bag of the motor.
By the way. I haven't found any exact replacement for the integrated fuses that slip into that nylon clip at the top of the motor housing. So, currently I have one motor fused bypassed.