My CKRC Servo Axle Mount

[spliffnwesson]

First off, parts shipped quickly. The quality is very nice, the links aren't very shiny but they're good. The mounting plate is very nice.
Kinda surprised to see the parts bad was just a sandwich ziploc, but it works. Instructions would have been nice but it's not real hard to figure out.

The kit reuses the stock screws in the axle. I had to find some screws, washers and nuts to mount the servo, and add some washers to correct the big link that was causing toe-in.

I bought a Futaba servo horn, like the one pictured on the CKRC site, but I didn't have the proper hardware.
So I reused the Kimbrough Servo Saver, which is a little big, but it's only temporary.
I had to mount the servo behind the plate because of the saver being so fat. Which also makes the back of the servo hit the front 'bumper' on the chassis.
When I get the Futaba horn on it I'll be able to move it in front which clears the bumper. There's a support rib on the front of the mounting plates on the servo. Right now they're a little in the way, but it will sit better when it gets moved.

Using the HPI radio, the wheels still wouldn't turn all the way. I tossed the crystal in a TQ2 radio and there was a big difference.

I zip-tied the receiver to it's stock location, cuz after moving it too many times the double sided tape wouldn't stick.
I'm thinking about using the Slash's receiver box, but a balloon will be fine, I just need to get one.

I replaced the stock rear springs with some stiff black ones Will sent me :tmb
I don't know what they're from. They're the same height, but slightly bigger in diameter so I used some pliers and made one end smaller to sit on the bottom cup.
This fixed the torque twist. The body still pulls to the side a little, but all four wheels stay on the ground.

After installing the axle mount, servo, adjusting the big link to fix the toe-in, and the springs, this truck is mint.
I only tested it a little, driving it onto some boards and turning the wheels while it went up and down.
Everything works great now and I'm super happy. I even put some stickers on it to make it faster, which I'll post pics of tomorrow.

I can't wait to get a balloon and make a mud hole and give it a real test. Of which I'll make videos and take pics.

 

[william g]

put more screws holding the servo on so you won't break the plastic mount tabs, been there done that. :reye

Otherwise it looks good, you'll want to keep a servo saver with that servo, don't go horn because it has plastic gears and you'll strip them.

 

[spliffnwesson]

Thanks for the heads up.

This saver works, but it's a little bulky. Kinda thinking about looking for one with a smaller profile.
I have some more hardware that will work for the other servo holes, but with the little support piece in the way, I'm gonna try to find some little washers or something to fill the gap so the tabs don't bend and break.

 

[william g]

what about making a spacer from some styrene or lexan even that would be better than a bunch of washers because they'll drive you cookoo assemblng it. :tong

 

[spliffnwesson]

That would be better.

I think I have 4 spacers for lower links left over from my WK stuff that might work.
Might be too thick tho. The screws are long enough, but it might push the servo back and hit something.

Tho if the servo stays clear of getting hung up on something, it could help make the saver not stick out so far.

Gonna have to try n see.

If it doesn't work or if I don't have enough spacers, I have something else in mind.

 

[william g]

just trace the servo mount to some lexan you cut off a body
make some rectangles for each side and put in the holes.

That way you'd have a spacer plate the full length of the mount tabs :tmb