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Other › Drive gear question/help
02-12-2006 03:42 PM  12 years agoPost 1
Hotrod69

rrApprentice

Huntington Beach, CA

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I have finished building my Trex 450XL and when testing the 430L motor I ran into an issue. While checking the dravie train for level swashplate and that all linkag works freely I ran up the motor with no blades attached, just the flybar. I was in normal mode and at about 1/2 way up on the left stick the main gear seems to wobble a bit and make some noise, then at 2/3 stick the tail rotor gear disengaged from the main gear and it started free spinning. I backed off on the throttle and as it was spooling down to almost a stop the one way bearing seemed to re-engage with the tail rotor gear. It does this every time I go past 1/2 stick. I double checked that the locking collar on the main shaft was tight and there is no end play. I also double checkd the clearance between the motor pinion and the main gear which looks fine. But I'm suspect of this main gear as since the day I installed it there seems to be too much wobble or play in it, maybe a 32nd to 16th of an inch movement. The one way bearing is installed correctly per the instructions and the spacer/collar on the top of the main gear is also installed. So what could be wrong? Has anyone run into this?

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02-12-2006 04:12 PM  12 years agoPost 2
Hotrod69

rrApprentice

Huntington Beach, CA

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Thanks Bob that is my guess as well. Question, can you get the main shaft out and the two gears out with out splitting the frame? I've tried and the tail rotor gear is tight on the shaft and I can't seem to pull it out from the top. Also bob are you running the stock Align drive gear or the aftermarket with machined bearing advertised on this site?

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