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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Pred Gasser crown gear...
11-03-2004 03:36 AM  13 years agoPost 1
TWOWHEELTOM

rrApprentice

Yelm, WA

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I read a few posts awhile back stating the problem with the updated sprague bearing and crown gear set up....I have a vibration in my tail and cant seem to get my crown gear to mesh correctly. (the mesh always seems to loose, and almost instantly chews up my crown gear. Im on my third one now...) No matter how far forward I put the pinion. I thought I saw somebody saying to shim up the crown gear but cant seem to find the post (I have some up and down slop that if I shimmed, I think this would help out my problem.) thanks

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11-03-2004 04:39 AM  13 years agoPost 2
Billme

rrElite Veteran

MS

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Do you use the split collar on the bottom of the mast?
Bill

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11-03-2004 04:54 AM  13 years agoPost 3
TWOWHEELTOM

rrApprentice

Yelm, WA

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ummm, I have one out of the first batches....dont have my book in front of me right now....and Im not real good with the technical lingo, but I dont have the se either. So I have whatever came on it stock for the standard model

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11-03-2004 06:32 AM  13 years agoPost 4
Billme

rrElite Veteran

MS

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Get the split collar, and put it on the bottom, and do away with the bolt on colllar...when you go to tighten everything up...Slightly push down on the mast, which will force the maingear hub down on the bottom bearing while tightening the split collar on the bottom, then tighten the top collar..Reset your gear mesh, and go fly
Bill

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11-04-2004 07:04 AM  13 years agoPost 5
TWOWHEELTOM

rrApprentice

Yelm, WA

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thank you, makes sense to me!!

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11-30-2004 07:16 PM  13 years agoPost 6
lakespinner2

rrVeteran

north carolina

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Is the split collar that's recommended on the bottom of the main shaft the same as the split collar on the top. I see Century has 2 listed, HW6054 and ...54A. I think the first one is the collar on the top of the shaft, not sure what the second one is.

thanks, randy

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11-30-2004 08:59 PM  13 years agoPost 7
JKos

rrProfessor

Redondo Beach, CA

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You want HW6054. The 'A' version is the collar that goes around the bottom of the head block to clamp it on the main shaft (the newer version head has built in clamping action, so you may not have had this in your kit).

BTW, any quality 10 mm shaft collar will do the job. I put an MA collar in mine as my LHS had it available.

- John

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