Installing bearings

[BLiND]

Ok, I feel retarded for asking this but...

how do I get the rear diff out? There are two screws that look like they hold the plastic plate the surrounds the *diff* side of the rear axle in, but I basically stripped one of the screws trying to get it undone, the other came out easily, as did the C-clip on the rear axle, but is there anyway of opening up that rear end without undoing one of those screws?

The bearings seem a lot smoother in the rear wheels than the bushings did, but I cant notice a different on the front wheels, they spin for just as long when I give them a spin :(

I've got 3 bearings left to put in, a large one for the passenger side rear axle housing, and 2 very very small ones :)

where do those small ones go? Inside the axle housing that I cant get into I suppose?

[Free_Style]

You have to take those out. Use a bigger screwdriver. that is it. don't forget to check for hair mine was full of it.

[BLiND]

screwdriver didn't work on the screw that I stripped, so I got it out with a medium size pair of channel locks, and since that little gear gaurd clips on at the bottom I'm not concerned with running it with one top screw and the clip at the bottom.


anyways, so I got that open, slid the axle/diff assembly out, and installed the larger bearing in the passenger side axle housing, and one of the extremely tiny bearings in the hole that the center (idle gear?) rides on in the plastic housing.


now where does the other really tiny bearing go?! I'm going to take the diff apart now and see if I can find it, installing bearings in a car that I didn't build that doesn't have instructions is a real PITA! :rolleyes:

[BLiND]

sorry 4am my time and not thinking clearly, lol

what I meant was this: I've got all of the bearings installed (9pc overland bearing kit by RCRM from stellamodels off eBay)

but there is no bearing for one of the rear wheels! So either I've got one of the rear wheel bearings in the wrong place...or something?!

bearing locations:

4 in front wheels
1 in left rear wheel, medium size
2 in axle housing, large size
2 on idle gear shaft in tranny

that adds up to 9 :rolleyes:

but my diff side rear wheel still has a bushing in it! what the hell?! :mad: :eek:

[Mondo]

Kevin,

If the Overland is the same as the Racers and F1, only one rear wheel takes a bearing. As I haven't seen my Overland yet, I don't know, but the other Z's only take 7 bearings, 4 for the front wheels and 3 for the rear ends, two in the diff housing and one on a rear wheel. I think the rear left wheel takes the bearing, but then again it's been so long since I disassembled any of my Z's

[BLiND]

Originally posted by Mondo
Kevin,

If the Overland is the same as the Racers and F1, only one rear wheel takes a bearing. As I haven't seen my Overland yet, I don't know, but the other Z's only take 7 bearings, 4 for the front wheels and 3 for the rear ends, two in the diff housing and one on a rear wheel. I think the rear left wheel takes the bearing, but then again it's been so long since I disassembled any of my Z's


ok good to know...but which wheel? Both rear wheels have a plastic bushin in the outwer portion of the wheel. I stuck the bearing in the wheel opposite the diff side.


biggest difference from swapping the bearings in: acceleration is smoother, car runs quieter, batteries last longer but a good 5-10 minutes, and steering is actually better. But while I had it apart I installed some of the HPI micro diff lube on the inside of the gear diff, really smoothed out the diff action!

BTW - I drove it for 1 hour and 25 minutes while I was at work tonight, jumping mainly and driving on very low pile carpet with some hardwood sections. The jumps were tons of fun, 5" high cardboard signs that are angled, one launch ramp and one landing ramp positioned about half a yard away, perfect distance for the overland, it landed the jumps perfectly.

I think an hour and 25 minutes running time is outrageous, I use the cheap $0.75 a peice 700mAH AAA's in the car, with the largest pinion gear that the kit came with, and of course the bearings. I wasn't flooring it the whole time, but I was climbing over stuff and doing a lot of jumps, and donuts on the hardwood (its a retail store in a shopping mall, lol)

[Mondo]

BLiND,

Now I have my Overland, I've worked it out.
The bearing must be fitted to the diff-side wheel

[Sciamano]

Can anyone explain with a schematic where the bearings go?
Maybe modifying the attached image (it's for the Racers, but I guess it can be easily adapted to the Overland...).

I really did not understand where the smaller bearings go...

Thanks

[Mondo]

Luca,

They fit into the gearbox, on to the idler gear.
The idler gear is the gear between the pinion (motor) gear and the differential gear
Your Kyosho Overland shcematic diagram will show you how to take the cover off and remove the ideler gear.
Just take the plastic bushings out and replace them with bearings

[Sciamano]

Mondo, do you mean here?

[BLiND]

Originally posted by Sciamano
Mondo, do you mean here?

those are the ones!

[Sciamano]

Thanks everyone! :cool:

[Sciamano]

Since this might be a FAQ, I've made a couple of images and a PDF file as a guide to bearings installation on the Overland.

Maybe this post could go into the FAQ section, now....

Here are the files:

[Sciamano]

Rear Axle

[Sciamano]

And the instructions in an Adobe PDF (zipped) file