braking problem with my new octane xl

[Guya]

hi

this truck is 2 weeks old and a lot of fun ..
last few days i noticed the car will not stop.

after checking, it appears that the black lever is moving all the way and stops at the electricity box .. but its not enough to activate the brakes.

i took the lever out and moved the axle with the hex tool .. and verified that breakes are working .. but with the lever the travel is not enough.

any ideas ?

how to solve this problem ?

thank you.

 

[francis Labarbara]

When you look at the bottom do you have 3 brake disks?

 

[Guya]

yes.

i was told i need to shim the brakes ...
is it normal for a 2 weeks old car ?


here is how it looks.

 

[francis Labarbara]

Has the puck fallen out and are the screws tight.

 

[Guya]

screws are tight, i don't know what puck is.

 

[francis Labarbara]

 

[francis Labarbara]

109024
The arm is a cam and presses the puck into the shoes and squeezes them against the screw heads.

 

[Guya]

109024a ??

i have no idea .. need to take it all apart to check. but if i pull the lever to other side, it stops the red pads .. so i guess there is something to be pressed there ....

i will take it apart later ..

thanks.

 

[Guya]

Ok ..took it apart.
All parts are in place and intact.

The mechanism of brake deploy pin works fine in the hand.

New ideas ?

 

[paulnewman]

When you put it back together and use the controller to apply the brakes, does it pull the brake arm back (the bit you were moving back and forward on the video) far enough? When you push forward on the throttle to apply the brakes, the black round thing should be up against the brake arm and the spring should become compressed. If this is not happening then not enough pressure is being applied to the brakes so turn the knurled nut to the left of the spring so that this does happen (but not too tight or it will keep the brakes applied constantly). If this all looks good then it could be the servo that controls the brake/throttle situated in the battery/cdi/receiver box is at fault.

 

[francis Labarbara]

Watch the video @paulnewman. He has too much slop in the mechanism. The arm is hitting the electronics box.

I guess you could "shim the brakes" by placing washers on the screws before putting them threw the shoes.

 

[olds97_lss]

Watch the video @paulnewman. He has too much slop in the mechanism. The arm is hitting the electronics box.

I guess you could "shim the brakes" by placing washers on the screws before putting them threw the shoes.

That's pretty much all you can do. Didn't know the octane used a plastic arm for that.

 

[Guya]

well guys, thanks for the comments.
i took everything out and disassembled the brakes system, everything in there looks good.
i reassembled the car back .. and .. it works ... i have no idea why.

after reading the comments again i changed the spring to silicone fuel tube.
looks as if the brakes are working now .. not firm and agile .. but some how working ...

but any how .. the black plastic lever goes too much in the electric box direction. i wish it had teeth so i can rotate it a little .. but it doesn't

maybe i will add a shim in the point where the part that pushes the pads touches the axle of the lever.

right side of "109024a" in the above picture.

what do you think ?

 

[francis Labarbara]

Add washers on the head end of the screws that hold the shoes

 

[Jam Racing 1]

If you put a collar on the other side of your brake arm with a short piece of fuel tube between the arm and collar on it, it may give you a bit more braking action and keep that arm from hitting the battery/electronics box... Dubro and Ofna sell some and they are not too spendy.....

i had to rework my brake arm on my savage when i did the throttle mod, but now mine will do stoppies no problem....

 

[francis Labarbara]

I looked at mine and the brakes engage when the lever is straight up. Once they touch it is firm. You said your truck is 2 weeks old. Are they dragging while you're running it?

 

[olds97_lss]

Since it is plastic, maybe you could drill new holes in the arm where it mounts to the brake shaft.

 

[Guya]

@francis Labarbara , will try washers today. thank you, about brakes .. the drive shaft is loose when no brake applied .. and if car is on some small going down way is goes down when no throttle is applied .. and stops when i brake. but if running on 3rd .. and trying to stop .. hhmm ..... it takes a loooong way to stop.

@Jam Racing 1 , can you maybe please add a video or a pic ? ... i have no idea what is this mod or what you refer to .. thanks !

@olds97_lss , i was thinking about it .. but i am afraid i will destroy the plastic .. or that it will become not strong enough. i wish they made it in a way i could change the angle ...

 

[Jam Racing 1]

Kind of like I have this one the lower linkage with the 2 collars and springs, you can use fuel tube also and it works just as well, I do not have an octane, but possibly this may help, also a stronger throttle servo will help alot as the throttle servos on the stock rigs are notoriously weak on the savage nitro models and i am sure they are just as weak on the octane version...

 

[Guya]

@Jam Racing 1 thanks for the picture .. Looks like a heavy duty mechanics .. I decided to start with the simple stuff .. I add two nylone rings at the heads of the screws. The mechanism is now totally working with just the smallest move of the lever. While the drive shafts are rotating freely while not applied.. Looks as the good of all worlds .. Doesn't it ?

 

[francis Labarbara]

It does

 

[Guya]

So i will go test it out side

 

[Guya]

Killer brakes !!

Thanks.

My car is rolling forward when stopping

But now the steering servo died ;(

New car ... Two f#$% weeks only !!!

 

[olds97_lss]

I hate those kinds of RC days.

YAY! IT'S WORKING!!!
Aww... it's dead again...

 

[F-Type]

I bumped into the exact same problem today. I need to push the lever all the way into the electronics box to get it to brake. I couldn't see any damage, wear or loosened screws, so my assumption was something must have happened "inside", haven't taken it all apart. And it has happened suddenly I think, as the breaks worked fine yesterday. I did just like mentioned and added washers at the screw heads. It would be interesting to know exactly what happened, though.

 

[F-Type]

Now I have taken my brake apart too, and I can confirm that it is somewhat of a mystery.

And this is interesting, when bying spares, there are 4 washers included. There were none on my car and they don't show in the IPL.

 

[francis Labarbara]

I suspect your brakes are too tight and dragging. I have a gallon on my Octane and the bakes show no wear and engage at the original position. My savage x has gone 3 gallons and is the same.

 

[F-Type]

My brakes have not been too tight and dragging.
And they've hardly been used at all and look like new. Still this problem occured all of a sudden, just like Guya's.

 

[Jam Racing 1]

it is quite possible that the servo is just too weak to give the best braking, or possibly developed some slop in the linkage causing a loss of brake performance....

 

[francis Labarbara]

Guya's brakes look worn. I haven't seen yours.