Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Bergen R/C Helicopters


Bergen R/C Helicopters Bergen Intrepid 90 Intrepid Turbine Observer Industrial Twin Observer Turbine Support Forum


Reply
 
Thread Tools Display Modes
Old 06-20-2009, 10:18 AM   #1
hasgas
Registered Users
 

Join Date: Jun 2009
Location: Dundee Michigan
Default Shim up the main gear?

Has anyone else had to shim up the main gear on an intrepid to meet up with the tail rotor drive gear?
hasgas is offline        Reply With Quote
Old 06-20-2009, 11:05 AM   #2
uh1b1
Registered Users
 
Posts: 77
 

Join Date: Sep 2006
Location: out there
Default

Quote:
Originally Posted by hasgas View Post
Has anyone else had to shim up the main gear on an intrepid to meet up with the tail rotor drive gear?
you should not have to shim the main gear up,one thing to check is loosen the two silver collars that are in between the upper and lower bearing blocks and grab the head and pull up and then while holding the head up make sure the bottom collar is all the way down and tighten the bottom collar first and then tight the top one and then you should beable to set the gear mesh on the tail transmission.
__________________
Todd--Bergen Rc Helicopters
uh1b1 is offline        Reply With Quote
Old 06-20-2009, 12:19 PM   #3
hasgas
Registered Users
Thread Starter Thread Starter
 

Join Date: Jun 2009
Location: Dundee Michigan
Default

Thanks Todd, I gave it a shot and the brass sleeve on the auto hub is all the way up, and touching the bearing inside the block, I'm still shy of making contact with the main gear. Also loosened up the bolt that carries through the front of the tail trans and tried to push it down to make contact but again came up a little short of pos engagement. The main gear is on top of the alum. ring on the auto hub, looks the same as the pics on the build up disk. Do you think the shims would hurt anything?
hasgas is offline        Reply With Quote
Old 06-20-2009, 05:39 PM   #4
climbout
Registered Users
 

Join Date: Mar 2007
Location: Adelaide, Australia
Default

I found while building my EB that there was a little movement available by slightly loosening the top collar & lower bearing block then pulling the whole head up. After doing this my tail mesh went from "sloppy, chew up crown gear in a couple of flights" to "pretty much perfect, no binding, no backlash"

While I haven't been able to do that much flying, the mesh has stayed exactly the same.
climbout is offline        Reply With Quote
Old 06-20-2009, 09:21 PM   #5
v22chap
Registered Users
 
Posts: 1,078
 

Join Date: Mar 2005
Location: Granger, IN
Default

Hasgas

You also need to loosen the back 4 bolts that mount the tail transmission ,,,as they will sometimes keep it from moving down to mesh right . I had one that needed the front bolt of the main shaft bearing mount loosened to let it drop into mesh .

Finally ,,, sometimes the locktite gets into the slots of front tail transmission mount and fills the slot up and that will keep it from moving down ,,,take the tail transmission out and clean the slots out good and try it again .Also make sure there are no burrs on the main shaft block or the transmission mount where they slide together .
Good luck
__________________
Larry C
Bergen R/C Helicopters
v22chap is offline        Reply With Quote
Old 06-20-2009, 09:27 PM   #6
rappy-60
Registered Users
 

Join Date: Oct 2006
Location: Paris, France
Default

Do you have any pics of the tail transmission. Make sure its the correct way round. You should not have to shim it to make contact with the tail drive. Is it a driven tail or non? Please post pics so we can help.

Dale
__________________
New Vibe 50, 8717's and Solid G. Wow, this bird rocks.
2x Bergen EB - Duralites, 8311's, 8611, 401 Gyro
Raptor 90 - 9252's, 401 Gyro | Raptor 50 - 9252's, 611 Gyro
Trex 450SE - HB56's, Kontronics ESC
Trex 600 - 9252's, 401 Gyro | Trex 600 - Stretched to 700, 45-06 Tango, CCHV85
rappy-60 is offline        Reply With Quote
Old 06-20-2009, 11:08 PM   #7
cbergen
Registered Users
 
Posts: 7,161
 
My HF Map location
Join Date: Apr 2004
Location: Cassopolis,MI
Default

Ensure that the lower main shaft bearing block is not installed upside down. The open bearing side should face UP.

As Dale said, some pics may help with diagnosis...

Due to the frames being tight around the cage of the transmission, sometimes (well, almost always) it is necessary to tap the front of the cage down using a driver and a small tapping tool (some call it a hammer) to get it to move.

The "ears" of the cage should be at least flush with the top of the bearing block where they dovetail together.
__________________
Chris D. Bergen
Bergen R/C Helicopters
cbergen is offline        Reply With Quote
Old 06-21-2009, 10:45 AM   #8
hasgas
Registered Users
Thread Starter Thread Starter
 

Join Date: Jun 2009
Location: Dundee Michigan
Default

Thanks for the direction to look in. I have some pics- kind of hard to tell but it looks like the arms leading from the front of the trans box are flush with the bottoms of the upper frames just above the rear of the main gear, also the bearing block is installed the same as the pic of the upper block with the orientation possibly asbackwards. I have the suface of the lower bearing block that accepts installation of the bearing, facing the main gear, so the smaller hole is facing up, on the upper block the smaller hole is facing down. You can see about one mm of the lower flange from the auto hub sticking out of the main gear from the shims. I am pulling them back out and inspecting the mounting holes for locktite, and correct orientation of the blocks and trans before re-installing. I thought it looked the right way round when doing the build but- well, y'no.
Attached Thumbnails
Click image for larger version

Name:	Bergen 005.JPG
Views:	66
Size:	151.3 KB
ID:	102688   Click image for larger version

Name:	Bergen 006.JPG
Views:	55
Size:	159.7 KB
ID:	102689   Click image for larger version

Name:	Bergen 007.JPG
Views:	63
Size:	157.0 KB
ID:	102690   Click image for larger version

Name:	Bergen 008.JPG
Views:	63
Size:	132.6 KB
ID:	102691   Click image for larger version

Name:	Bergen 001.JPG
Views:	58
Size:	147.7 KB
ID:	102692  

Click image for larger version

Name:	Bergen 002.JPG
Views:	57
Size:	147.5 KB
ID:	102693   Click image for larger version

Name:	Bergen 003.JPG
Views:	56
Size:	156.6 KB
ID:	102694   Click image for larger version

Name:	Bergen 004.JPG
Views:	52
Size:	166.4 KB
ID:	102695  
hasgas is offline        Reply With Quote
Old 06-21-2009, 11:32 AM   #9
ernatz
Registered Users
 
Posts: 147
 

Join Date: Apr 2005
Location: new york
Default

It looks to me at least the top block is upside down, can't see the lower block.
I say this from looking looking at the build diagrams..
__________________
Ernie
Flyin For Fun
Raptor 90, X-Cell 1005 Gasser/SE/Tempest Hybrid, Ion-X
44 Magnum FBL...Skookum....
Waiver #RW4030
ernatz is offline        Reply With Quote
Old 06-21-2009, 12:32 PM   #10
hasgas
Registered Users
Thread Starter Thread Starter
 

Join Date: Jun 2009
Location: Dundee Michigan
Default

Yep, got it apart and checked the drawing again, turns out I had both the upper and lower bearing blocks in backwards. Fits together fine now! Appreciate the info and concern. The only other grey area I had was the new head dampners versus the two piece O rings. I have installed the new one piece ones with the one .40 shim on each side. I prefer a softer feel on the head, not really much 3-D goin on over here. I have a very small amount of lateral play in the assembly. Had a tough time getting more than one set of shims on, so just went with the one. Any suggestions on compressing the rubber to squeeze one more set of shims on, or really not necessary?
hasgas is offline        Reply With Quote
Old 06-22-2009, 08:39 AM   #11
cbergen
Registered Users
 
Posts: 7,161
 
My HF Map location
Join Date: Apr 2004
Location: Cassopolis,MI
Default

If you like a soft head, then certainly try it the way you have it. If you feel that it is too soft, then add another shim, using the blade grip to press the circlip in to the groove.
__________________
Chris D. Bergen
Bergen R/C Helicopters
cbergen is offline        Reply With Quote
Old 06-22-2009, 08:57 PM   #12
hasgas
Registered Users
Thread Starter Thread Starter
 

Join Date: Jun 2009
Location: Dundee Michigan
Default

Thanks Chris, I ended up pulling it back apart and getting another shim in.
hasgas is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Bergen R/C Helicopters


Bergen R/C Helicopters Bergen Intrepid 90 Intrepid Turbine Observer Industrial Twin Observer Turbine Support Forum

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2015 by RCGroups.com, LLC except where otherwise indicated. The HeliFreak.com logo is a trademark of RCGroups.com, LLC.