Two Spur Gears Broken

[oscarin2000f]

Hi everybody.

I'm from spain and i'm very happy to greet you.

I'm testing one X10 and i'm having a big problem with the spur gear.

It breaks down when the car lands form a big jump.

I believe it colud be a problem of an excesive flexion of the chasis or a incorrect setting of the slipper (but i have ser it as manual)

Can you help me with this problem?

Thank you for your help and please sorry for my bad english.

[DirtRacer]

First off, welcome to the-pred forum!! ;D

Secondly, this is an international forum and we would welcome anyone who drives the Tenth tech cars to this site no matter where your from. I will admit my grammar is not all too good so dont worry about yours ...

About your gear problem, have you appropriate gap (play) between the pinion with the spur gear?

Im pretty sure you've covered this but just wanting to make sure you've not overlooked this small detail.
Im sure other members will be here soon to look into your dilema.

Enjoy the site!! ;D

[oscarin2000f]

Hi dirtracer. Thank you for your wellcome.

I let standar gap (play) between the pinion with the spur gear like in my others cars with the first spur gear and i even let a little bit more gap with the second spur gear, so i don't think this is the problem.

Anyway thank you for your help!

[Northy]

Hi and welcome,

You need to make sure the clamp bolt is REALLY REALLY tight once you have adjusted the mesh (gap). Tighten it as tight as you dare and then some more!

G

[oscarin2000f]

I believe the clamp bolt is enought tight because in spite of break the spur gear there is a correct gap after this.

I think the problem goes by the way of the slipper, can you to explain me how to set the slipper once it's installed on the car?

When it should slip and when not?

Thank you.

[DirtRacer]

Your slipper should make a very high pitch "whheee" noise before your wheels starts pushing your car. If say you set it tight so that the clutch is more or less locked and then loosen off the nut in very small incriments until you get the desired effect.

[mattw]

There does seem to be the odd issue with Spur gears. I hear of quite a few people that are having problems. Personally i still have the origional one that i built the car with in April. I really don't know why this is. I think my slipper is fairly tight, i don't think there is much slip in it.

I always mesh so there is only the smallest amount of play between pinion and spur - and tighted the clamp very tight - so so it "squeaks" a little as i tighten it!!!!

[southwell]

Hi all, i ran my pred for the first time yesterday and did two spurs in three runs! can anyone explain why, and a solution?
I had the mesh spot on and the clamp verrrry tight, yet it still chewed the spur? Generally within 3 mins. It was damaging the teeth rather than just destroying itself completely?
With my old pred (ETQ) i never changed the spur in 2 years of running it!

cheers

[Cooper]

there are many many thing written about the spur search it chaps

[southwell]

Thanks, ive searched and not come up with a definitive solution.
What is this bearing mod? Are there instructions to do it?

[bigboss]

Two things to look at .
1.If the pinion/motor moves away from the spur gear, not only side ways so that the mesh of the gears becomes looser, buy also if the motor moves toward the front of the car, or even if the motor has an angle (pinion is high but end bell is low). any of these and the spur is toast. look up motor mount fixes.
2.if the mesh of the pinion & spur is wrong to start of with.....
the mesh should be as tight as possible but with a small amount of play between the gears. I like it tighter than other cars just because of the problem you're having. have a search for the stuff we did back when we had the exact problems you are having now, It's mostly the motor mount anyway.
Yes there is a guide to the bearing mod but I can't remember if it was posted here or at Oople, sorry.

[chris burgess]

There is a possibility that you have the original X10 spurs which had too many teeth for the circumference of the spur, which was also made out of the wrong material incidentally.

These spurs damaged teeth as opposed to wrecking spurs.

You need to clamp them very, very tight, but you also need to ensure that the motor is in the clamp properly. It is still possible to think you have the motor in the clamp straight, only for it not to be.

[southwell]

Ok, i will source a cap head screw, as i don't wanna be clamping down on that small screw too much.
Iam unsure why they have problems with this mount, my ETQ mount never let the motor go loose, and i never replaced a spur, ever.
I kept my meshing as tight as possible on the second spur, but it still went quickly.
I will contact Ian and see if he can diagnose which spur they might have sent me, and hopefully it will cure my problem.
Gotta hate teething problems!

Cheers

Ian

[andyreeves]

i tried emailing ian when i had this probem and all it generlly said was that the motor wasn't installed properly. It is annoying i know i am just in the process of rebuilding the whole car to double check i hav everything right and will hopefully be able to have a practice after the meeting at kiddy on sunday to see if i have sused the problem out.

[Northy]

Ian,

Replied to your PM on Doughty, sorry been busy.

Get a cap head screw for the motor mount. Tighten it till it squeeks!

G