David Cutler

Hi everybody,

After only 3 days I have badly worn gears.

After 5 tanks of fuel, the main, large gear that inputs into the gearbox has worn so much that half of the teeth have worn off, and it doesn't now mesh with the gear on the output of the clutch.

I know there is a steel version of the gear. Should I go for one of those?

Thanks

-David C.

Jon's NJ maxx

FIrst check to see whats causeing the problem, happened to me and my engine mount was cracked threw the egine forward chewing up the gear.. RRP Robinsion racing spur gear with dual slipper is the one to go with about 35 bucks towerhobbies.com

adeoliver

My Feedback: (4)

You've got an extremely bad alignment(mesh) between the spur gear and the clutchbell. you need to adjust the engine mounts to line up better with the spur gear. The spur gear should never loose any material like that, the only time the spur gear should fail is excessive used and the teeth become week and strip, but that will take along time!!

elbowcreek

Ya make sure your mesh is correct if you are in doubt put a piece of paper in between the gears when you adjust the motor mount so you get the proper clearance between the spur and clutch bell, also make sure you blue locktite your motor mount screws so they don't vibrate loose

David Cutler

Thanks everybody.

I've adjusted the engine position now and the gears now seem to mesh OK.

Thanks again

David C.

SuperMaxxMan

jeezz...but wut engine are you running? because if you are running a .21 that will chew up your gears and mess up your truck. but if you are running a .15 you do have bad allignment.

adeoliver

My Feedback: (4)

Supermaxxman, I beg to differ, I have run many "PLASTIC" spur gears on my .21 hyper 4ports 8ports, and .247 powered tmaxx's, with no failiors EVER, and right now I am running a Ofna 1/8th 51 tooth "plastic" spur. The only time these gears will ever fail are dew to bad mesh, and improperly tuned slipper systems. I have trashed diff gears rather then spur gears, but that was dew to a bad mesh between the pinion and ring gears, and also the weak screws holding the diff cups to the ring gear.

adeoliver

My Feedback: (4)

Oh BTW David, change that spur gear, just put a new one on it, cause you will end up tearing the worn one apart, no sence in running the bad gear anylonger.

JeDi_MaStEr

Hey, while you guys are on this subject, I had a similar problem, I stripped my Clutch Bell (stupid me neglected to lock tite engine last break down and a few huge jumps and BAM...)

Anyhow, I got a new 22 Clutch Bell, I used a strip of paper, lined it up best I could tightened down the motor, however, the Spur and Clutch teeth don't really mesh, they kind of do, it seems like they ride each other more than anything..Is this the way they should be? Appreciate the responses..

adeoliver

My Feedback: (4)

Ok well in that case I never use paper because I am so used to the feel and look of the mesh, there should be a tiny bit of slack between the clutchbell and spur gear, I just do a 2 finger test. Put one finger on the clutchbell, and another on the spur gear, then hold the clutchbell tight and rock the spur back and forth, there should be a tinny amount of play, like the thickness of a piece of paper.

JeDi_MaStEr

Thanx adeoliver, I will give that a try..so I guess its safe to assume that the spur and bell teeth really never mesh all the way, my teeth seem to go into each other about 1mm or so, kind of gives it the illusion that they are just riding each other...does this sound normal?