RCCrawler Forums

pro mod steve · 05-07-2016, 05:49 PM

Lost a rear pinion bearing bashing today after 3 packs and destroyed housing. I bash dirt no water or mud. Bearings were NEW AVID and I put extra grease in them before installing them. Had 14 6S runs on these gears with BHB mod no problems. I think I need to design a boot or something to seal the pinion. It is the lowest point on the truck and gets all dirt from the front drive wheels thrown at it. I don't think this is a gear issue because the rear bearing is gone but the head or front bearing is perfect. Any ideas?

pro mod steve · 05-07-2016, 05:51 PM

SeanKewley · 05-07-2016, 06:10 PM

It definitely looks like dirt found its way in there. I check/ replace pinion bearings every 15 runs on 4S. You might need to do a maintenance check after 10 on 6S.

pro mod steve · 05-07-2016, 06:14 PM

I was on my 3RD pack with NEW bearings.

84yoda · 05-07-2016, 06:29 PM

VP housing and ceramics. Thats my plan. Just need a VP housing now. Lol

cmbscx10 · 05-07-2016, 07:54 PM

That sucks especially with Avids.

I thought of using a shock or diff boot from a Losi 5, DBXL or one of the 1/5scale trucks but couldn't find measurements of the boots to see if they would slip over the axle housing.

$$ Expensive but lots of spares
https://www.amainhobbies.com/losi-de...252017/p272733

https://www.amainhobbies.com/losi-ce...sb3222/p228375

84yoda · 05-07-2016, 08:11 PM

5 Piece Heat Shrink Wire Wrap Assortment

That comes with a 1" tubing size and I think that should fit over the housing.

pro mod steve · 05-07-2016, 08:29 PM

Looking at that option. Also thinking of using a automotive freeze plug backwards. Press fit over nose of housing drill a hole and CL glue some foam to it and use some shock oil in the foam to trap the dirt like a K&N air filter. You can remove the foam when dirty and install a new piece. No drag on the drive shaft.

BarHarborBasher · 05-07-2016, 09:13 PM

I've been running the XL this weekend and the bearings are packed full of mud... Ive gotta do a boot mod !! My gears still look new 75+ runs !!!

Tzicul · 05-08-2016, 02:56 AM

Quote:

Originally Posted by 84yoda

5 Piece Heat Shrink Wire Wrap Assortment

That comes with a 1" tubing size and I think that should fit over the housing.

Heat shrink won't work, tried that already. It will crack, unless you find a way to make some corrugation. And don't forget that, whatever you do, you can' t seal on the rear axle, it will need to rotate around it

pro mod steve · 05-09-2016, 05:54 PM

So I started brainstorming at work today. The credit for my first design goes to my coworker who came up with it. We get parts all the time with these caps plugging holes and we save em for plugging holes.

bbos12 · 05-09-2016, 05:57 PM

That's a great idea! Should help quite a bit for dirt/mud. I'm sure water will still find a way but at least it won't be being forced in there like it was before!

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pro mod steve · 05-09-2016, 05:58 PM

Still have full shaft articulation and being its open in the back if stuff gets in it SHOULD fall out. Plus it cost nothing. Hopefully get some testing this weekend. Don't do water here.

BarHarborBasher · 05-09-2016, 06:13 PM

Awesome mod Pro Mod !!! I'm gonna have to try this one out !!
That plastic looks lite & soft !! Awesome !!

pro mod steve · 05-09-2016, 07:03 PM

Put it all back together with same gears and still smooth as glass. Guess I got lucky. New housing of course.

bbos12 · 05-09-2016, 07:10 PM

That's awesome Steve! Looking forward to your findings! Got my batteries today by the way. Can't wait to try em out

Sent from my iPhone using Tapatalk

cmbscx10 · 05-09-2016, 07:51 PM

Nice work to you and your coworker. Sometimes it is the simple things that actually may work. Look forward to seeing if it holds up.

pro mod steve · 05-09-2016, 08:25 PM

Thanks everyone. Hoping this is something simple that can help everyone. Come hell or high water I am going to own this beast and beat it like it owes me money and get change back.

Tzicul · 05-10-2016, 05:32 AM

Nice job! I'm quite curios how well will keep the dust away. I was thinking of even a more waterproof solution by installing a bearing on the shaft and some kind of flexible hose from this bearing to the rear axle. I am still thinking

I don't think a shrink tube will work, it's too stiff, especially at this diameter.

bradi · 05-10-2016, 02:41 PM

Hell of a idea Steve! I did something similar but I like your idea better if it works. I used this.. https://www.amainhobbies.com/align-l...60064b/p207449
It looks like an oversized rubber O ring. I slid the O ring over the drive shaft so that it almost touches the diff housing.

05-07-2016, 05:49 PM	#1
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Pinion Bearing Issues Lost a rear pinion bearing bashing today after 3 packs and destroyed housing. I bash dirt no water or mud. Bearings were NEW AVID and I put extra grease in them before installing them. Had 14 6S runs on these gears with BHB mod no problems. I think I need to design a boot or something to seal the pinion. It is the lowest point on the truck and gets all dirt from the front drive wheels thrown at it. I don't think this is a gear issue because the rear bearing is gone but the head or front bearing is perfect. Any ideas?

05-07-2016, 05:51 PM	#2
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues

05-07-2016, 06:10 PM	#3
SeanKewley Newbie Join Date: Mar 2016 Location: Hustisford, WI Posts: 42	Re: Pinion Bearing Issues It definitely looks like dirt found its way in there. I check/ replace pinion bearings every 15 runs on 4S. You might need to do a maintenance check after 10 on 6S.

05-07-2016, 06:14 PM	#4
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues I was on my 3RD pack with NEW bearings.

05-07-2016, 06:29 PM	#5
84yoda I wanna be Dave Join Date: Apr 2015 Location: Roseville, Ca Posts: 2,506	Re: Pinion Bearing Issues VP housing and ceramics. Thats my plan. Just need a VP housing now. Lol

05-07-2016, 07:54 PM	#6
cmbscx10 I wanna be Dave Join Date: Jun 2013 Location: Ramona, CA Posts: 2,178	Re: Pinion Bearing Issues That sucks especially with Avids. I thought of using a shock or diff boot from a Losi 5, DBXL or one of the 1/5scale trucks but couldn't find measurements of the boots to see if they would slip over the axle housing. $$ Expensive but lots of spares https://www.amainhobbies.com/losi-de...252017/p272733 https://www.amainhobbies.com/losi-ce...sb3222/p228375

05-07-2016, 08:11 PM	#7
84yoda I wanna be Dave Join Date: Apr 2015 Location: Roseville, Ca Posts: 2,506	Re: Pinion Bearing Issues 5 Piece Heat Shrink Wire Wrap Assortment That comes with a 1" tubing size and I think that should fit over the housing.

05-07-2016, 08:29 PM	#8
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues Looking at that option. Also thinking of using a automotive freeze plug backwards. Press fit over nose of housing drill a hole and CL glue some foam to it and use some shock oil in the foam to trap the dirt like a K&N air filter. You can remove the foam when dirty and install a new piece. No drag on the drive shaft.

05-07-2016, 09:13 PM	#9
BarHarborBasher RCC Addict Join Date: Jan 2016 Location: Bar Harbor Posts: 1,529	Re: Pinion Bearing Issues I've been running the XL this weekend and the bearings are packed full of mud... Ive gotta do a boot mod !! My gears still look new 75+ runs !!!

05-09-2016, 05:54 PM	#11
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues So I started brainstorming at work today. The credit for my first design goes to my coworker who came up with it. We get parts all the time with these caps plugging holes and we save em for plugging holes.

05-09-2016, 05:57 PM	#12
bbos12 Pebble Pounder Join Date: Feb 2016 Location: Stillwater Posts: 153	Re: Pinion Bearing Issues That's a great idea! Should help quite a bit for dirt/mud. I'm sure water will still find a way but at least it won't be being forced in there like it was before! Sent from my iPhone using Tapatalk

05-09-2016, 05:58 PM	#13
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues Still have full shaft articulation and being its open in the back if stuff gets in it SHOULD fall out. Plus it cost nothing. Hopefully get some testing this weekend. Don't do water here.

05-09-2016, 06:13 PM	#14
BarHarborBasher RCC Addict Join Date: Jan 2016 Location: Bar Harbor Posts: 1,529	Re: Pinion Bearing Issues Awesome mod Pro Mod !!! I'm gonna have to try this one out !! That plastic looks lite & soft !! Awesome !!

05-09-2016, 07:03 PM	#15
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues Put it all back together with same gears and still smooth as glass. Guess I got lucky. New housing of course.

05-09-2016, 07:10 PM	#16
bbos12 Pebble Pounder Join Date: Feb 2016 Location: Stillwater Posts: 153	Re: Pinion Bearing Issues That's awesome Steve! Looking forward to your findings! Got my batteries today by the way. Can't wait to try em out Sent from my iPhone using Tapatalk

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05-09-2016, 07:51 PM	#17
cmbscx10 I wanna be Dave Join Date: Jun 2013 Location: Ramona, CA Posts: 2,178	Re: Pinion Bearing Issues Nice work to you and your coworker. Sometimes it is the simple things that actually may work. Look forward to seeing if it holds up.

05-09-2016, 08:25 PM	#18
pro mod steve Rock Crawler Join Date: Dec 2014 Location: friendswood, TX Posts: 932	Re: Pinion Bearing Issues Thanks everyone. Hoping this is something simple that can help everyone. Come hell or high water I am going to own this beast and beat it like it owes me money and get change back.

05-10-2016, 05:32 AM	#19
Tzicul Quarry Creeper Join Date: Jan 2015 Location: Bucharest, Romania Posts: 372	Re: Pinion Bearing Issues Nice job! I'm quite curios how well will keep the dust away. I was thinking of even a more waterproof solution by installing a bearing on the shaft and some kind of flexible hose from this bearing to the rear axle. I am still thinking I don't think a shrink tube will work, it's too stiff, especially at this diameter.

05-10-2016, 02:41 PM	#20
bradi Newbie Join Date: Mar 2016 Location: Kingsville, On Posts: 3	Re: Pinion Bearing Issues Hell of a idea Steve! I did something similar but I like your idea better if it works. I used this.. https://www.amainhobbies.com/align-l...60064b/p207449 It looks like an oversized rubber O ring. I slid the O ring over the drive shaft so that it almost touches the diff housing.

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