Spur Gear Issue

[Mike's 25]

I put an HPI 5.9 engine in my 25 along with upgrading the clutch and spur gear as they recommend. I used the HPI two piece spur gear and during the first run all six screws that hold the hub to the gear either came out or broke, there was nothing left so I think they just came out. Thinking I didn't use enough locktite on the threads I reassembled with new screws and lots of locktite and it came apart on me again. I ordered a one piece spur gear to alleviate the problem, I hope, but what would cause this? Is my spur gear too tight? I tightened the nut all the way then backed it out a half turn. Any help would be greatly appreciated. Thanks.

 

[maximusraylius]

ive never ran the two piece spurs so I'm not sure what could be causing it if the screws were loc tightened. .one piece is the way to go ..less things to mess up..

 

[JoeGuam]

If it is the purple piece spur gear (middle). I have done everything to keep the screws from backing out but not even lock tight worked. I used a nut to hold it but it rubbed against the transmission. I recommend getting the steel spur gear 52 or 47 and throw that thing away.

 

[xll-SavageX-llx]

I would of used red loctite
it's not like your going to take the 2 pieces apart every night.

Good choice on the 1 piece it will be alot better.

 

[Shaun]

ya i cant speak from experience as i have never used the 2 piece spur but like most things the less things that can go wrong the better lol

 

[JKLNHYDE]

I had the same problem. So after assembling it with red loctite, I dabbed a bit of superglue on the backside of the spurgear where the screws were sticking out and that solved my problem. And if I need to swap the gear out, a slight twist with a needlenose pliers clears the superglue off and you can take the screws out.

 

[Mike's 25]

HPI actually supplied blue locktite in the package. I have a one piece on order. Glad to hear it's not unusual.

 

[Mike's 25]

BTW, Thanks.

 

[xll-SavageX-llx]

HPI actually supplied blue locktite in the package. I have a one piece on order. Glad to hear it's not unusual.

Thinks like that should be red loctited. same as a pinion on a brushless motor.

 

[Mike's 25]

Thinks like that should be red loctited. same as a pinion on a brushless motor.

I'll try that as a back-up. Blue must be cheaper since HPI included it. Of course I have to get my hands on some more of those tiny screws.