Santa Fe 8352 Mechanical Problems on Gears

Both gears just worn out. You can get original plastic spur drive gear or replacement brass gears.

Thanks Chuck for the reply. How would I get the old axle out of the truck? I tried a few ways and seems the truck was made around the axle.

I don't see any worn gears, this actually looks like a very low hours diesel. 

The nylon gear(8010-116) slipping off the drive axle is a common problem(when it stays on, it indexes the worm wheel to the worm). You can epoxy it to the shaft after cleaning all grease & oil off both parts or replace it. 

Rarely do both gears slip on that drive axle. The worm wheel looks like brand new.

The drive gear is on a stepped axle. Both sideframes need to be removed and the drive gear tapped out from the white spur gear side.

Epoxy won't stick to the nylon gear. I'd replace it with a replacement brass gear. Is the Drive gear secured to the axle? when you turn it by hand, does it slip on the axle, or is the white gear slipping on the shaft?

Thank you sirs for your replies. I agree that epoxy would be hard to get to stick and cure to the gear. Anyone know how I could find this brass gear? I also agree that the gears are not worn, just not pressed on properly.

If I am hearing you correctly. I would take out the sideframes, and slip on the new brass gear that should be a better replacement and hopefully hold its place. Once I have the sideframes off I could also better secure the worm wheel onto the axle, maybe use some epoxy here. This should keep all gears tight and secure in place.

Chuck Sartor posted:

Epoxy won't stick to the nylon gear.

I disagree. I have one repair done over 30 years ago that's still holding.

Mr D posted:

Anyone know how I could find this brass gear?

Part number 600-111 found HERE.

It's my impression that at least some of those worm axles are stepped on both ends. The axles that are made this way cannot be pressed out by pushing on the end with the spur gear.
Nor can they be pressed out by pushing on the opposite end. 

Attached below is a photo lifted from EBay that shows the step that prevents it from being pressed out by applying pressure from the gear end.

I've broken a few tools when I forgot about this, and the axle couldn't be pressed out.
How do people get them apart?

The gear cannot be on the axle when installed. The axle gear must go through the truck frame first, then the gear installed then through the truck frame and the drive gear attached to the knurled spline. It can't be installed the way the picture shows. Besides, you really don't want the fiber gear shown if you plan on operating the engine.

Hi Gentlemen, when I receive the new metal drive gear. Can I just press it onto the worm axle with a pair of needle nose pliers and a flathead screwdriver or do I have to dismantle the truck and use a special press? How does the drive gear stay put?