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Elevator trim arms, brakes, nose gear torque tube.

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teamgrumman(at)YAHOO.COM
Guest

Posted: Sun Aug 08, 2010 12:24 pm Post subject: Elevator trim arms, brakes, nose gear torque tube.

I was installing the elevator trim arms on a customers plane yesterday and ran into the same problem I did the last time I installed some.  The pivot points on the elevator, the edge of the tab, rub on the trim arms.  This caused the trim arms to work their rivets.  One rivet was crowded out quite a lot.  Both trim arms had marks on them where they were rubbing on the tab.  Also, the trim arms come drilled for #30 (.128) rivets.  The holes in the aileron trim tabs are around .150 in diameter.  This is also what I've encountered on the last 3 sets of trim tabs I've replaced.  At a minimum, the trim arms need to be drilled and larger rivets installed.  I mentioned the misfit to Garner a while back, thinking it was the way the trim arm had been  bent, but I think it's the tab the arm pivots on.  

Brake.  Anyone seen this before?  the brake mounting holes (bolt holes) have been drilled off axis.  The lining rides on top of the disk.

Nose gear torque tube.  In Dayton, Garner had an overhauled nose gear torque tube assembly.  It was all painted black.  I asked him if he could powder coat the bearing supports silver on the torque tube.  He laughed of course.  I have one for the project plane.  Out of curiosity, I thought I'd paint it two colors.  Wow, what a pain-in-the-ass to paint.  There are so many odd surfaces and places almost impossible to paint.  After all the work masking and priming and painting, I think they look just fine in black.

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teamgrumman(at)YAHOO.COM
Guest

Posted: Wed Aug 11, 2010 10:51 am Post subject: Elevator trim arms, brakes, nose gear torque tube.

No comments??????

From: Gary Vogt <teamgrumman(at)yahoo.com>

To: Teamgrumman List <teamgrumman-list(at)matronics.com>

Sent: Sun, August 8, 2010 1:22:43 PM

Subject: Elevator trim arms, brakes, nose gear torque tube.

 I was installing the elevator trim arms on a customers plane yesterday and ran into the same problem I did the last time I installed some.  The pivot points on the elevator, the edge of the tab, rub on the trim arms.  This caused the trim arms to work their rivets.  One rivet was crowded out quite a lot.  Both trim arms had marks on them where they were rubbing on the tab.  Also, the trim arms come drilled for #30 (.128) rivets.  The holes in the aileron trim tabs are around .150 in diameter.  This is also what I've encountered on the last 3 sets of trim tabs I've replaced.  At a minimum, the trim arms need to be drilled and larger rivets installed.  I mentioned the misfit to Garner a while back, thinking it was the way the trim arm had been  bent, but I think it's the tab the arm pivots on.  

Brake.  Anyone seen this before?  the brake mounting holes (bolt holes) have been drilled off axis.  The lining rides on top of the disk.

Nose gear torque tube.  In Dayton, Garner had an overhauled nose gear torque tube assembly.  It was all painted black.  I asked him if he could powder coat the bearing supports silver on the torque tube.  He laughed of course.  I have one for the project plane.  Out of curiosity, I thought I'd paint it two colors.  Wow, what a pain-in-the-ass to paint.  There are so many odd surfaces and places almost impossible to paint.  After all the work masking and priming and painting, I think they look just fine in black.

               [quote][b]

grumpyparts

Joined: 28 Jan 2009
Posts: 65
Location: EGHH

Posted: Fri Aug 13, 2010 9:43 pm Post subject: Re: Elevator trim arms, brakes, nose gear torque tube.

I've never seen puck wear like that before. My only input would be is the correct back plate fitted. Could another p/n back plate fit the screw holes but with different pad rivet hole position.?

teamgrumman(at)YAHOO.COM
Guest

Posted: Sat Aug 14, 2010 8:21 am Post subject: Elevator trim arms, brakes, nose gear torque tube.

It looked to me like the bolt holes on the outside lining pad/support (whatever it's called) was drilled off center.  That's Cleveland quality.

From: grumpyparts <i.r.m(at)btinternet.com>

To: teamgrumman-list(at)matronics.com

Sent: Fri, August 13, 2010 10:43:35 PM

Subject: Re: Elevator trim arms, brakes, nose gear torque tube.

         [quote][b]

bob.hodo(at)YAHOO.COM
Guest

Posted: Sat Aug 14, 2010 9:23 am Post subject: Elevator trim arms, brakes, nose gear torque tube.

Gary, when I worked at a tire store I was taught to always stack the new pad on top of the old one and feel with my fingers to make sure their edges met all around.



Is it possible that the new pads are not the same width, or that they are what was drilled off center from the old ones?



I have only done drakes on the plane twice, and never had a problem, however, I have not gotten a mirror to see what mine look like.  From the pic you posted it looked like the pad was outside the outer diameter of the disc (rotor) is that correct?



Bob



--- On Sat, 8/14/10, Gary Vogt <teamgrumman(at)YAHOO.COM> wrote:

 	  Quote: 	
		  

From: Gary Vogt <teamgrumman(at)YAHOO.COM>

Subject: Re: Re: Elevator trim arms, brakes,  nose gear torque tube.

To: teamgrumman-list(at)matronics.com

Date: Saturday, August 14, 2010, 11:20 AM



It looked to me like the bolt holes on the outside lining pad/support (whatever it's called) was drilled off center.  That's Cleveland quality.



From: grumpyparts <i.r.m(at)btinternet.com>

To: teamgrumman-list(at)matronics.com

Sent: Fri, August 13, 2010 10:43:35 PM

Subject: TeamGrumman-List: Re:  Elevator trim arms, brakes, nose gear torque tube.



   



          	  Quote: 	
		  http://forums.matronics.com[/url]www.matronics.com/contribution">http://www.matronics.com/contribution 	


	


               [quote][b]

grumpyparts

Joined: 28 Jan 2009
Posts: 65
Location: EGHH

Posted: Sat Aug 14, 2010 11:18 am Post subject: Re: Elevator trim arms, brakes, nose gear torque tube.

Gary how did you correct this, did you replace the back plate. ?

grumpyparts

Joined: 28 Jan 2009
Posts: 65
Location: EGHH

Posted: Sat Aug 14, 2010 12:45 pm Post subject: Re: Elevator trim arms, brakes, nose gear torque tube.

The mirror picture may distort things, but that caliper doesn't look like a standard Cleveland part to me, the profile is different and can't see the bleed valve where I think it should be.

grumpyparts

Joined: 28 Jan 2009
Posts: 65
Location: EGHH

Posted: Sat Aug 14, 2010 1:08 pm Post subject: Re: Elevator trim arms, brakes, nose gear torque tube.

Ignore my last post, the picture you posted is so large on the forum site that I was concentrating only on the mirror image. I see the bleed valve now and I think shadows in the mirror image makes the profile of the caliper look different.

teamgrumman(at)YAHOO.COM
Guest

Posted: Sat Aug 14, 2010 3:00 pm Post subject: Elevator trim arms, brakes, nose gear torque tube.

The part the brake lining is riveted to is drilled off of it's correct axis.  I looks to me like the whole part is offset.

From: Bob Hodo <bob.hodo(at)YAHOO.COM>

To: teamgrumman-list(at)matronics.com

Sent: Sat, August 14, 2010 10:23:06 AM

Subject: Re: Re: Elevator trim arms, brakes, nose gear torque tube.

 Gary, when I worked at a tire store I was taught to always stack the new pad on top of the old one and feel with my fingers to make sure their edges met all around.

Is it possible that the new pads are not the same width, or that they are what was drilled off center from the old ones?

I have only done drakes on the plane twice, and never had a problem, however, I have not gotten a mirror to see what mine look like.  From the pic you posted it looked like the pad was outside the outer diameter of the disc (rotor) is that correct?

Bob

--- On Sat, 8/14/10, Gary Vogt <teamgrumman(at)YAHOO.COM> wrote:

 	  Quote: 	

From: Gary Vogt <teamgrumman(at)YAHOO.COM>

Subject: Re: Re: Elevator trim arms, brakes,  nose gear torque tube.

To: teamgrumman-list(at)matronics.com

Date: Saturday, August 14, 2010, 11:20 AM

It looked to me like the bolt holes on the outside lining pad/support (whatever it's called) was drilled off center.  That's Cleveland quality.

From: grumpyparts <i.r.m(at)btinternet.com>

To: teamgrumman-list(at)matronics.com

Sent: Fri, August 13, 2010 10:43:35 PM

Subject: Re:  Elevator trim arms, brakes, nose gear torque tube.

          	  Quote: 	
		  http://www.matronics.com/Navigator?TeamGrumman-Lisk" href="http://forums.matronics.com">http://forums.matronics.comwww.matronics.com/contribution">http://www.matronics.com/contribution 	

          	  Quote: 	

         [quote][b]

teamgrumman(at)YAHOO.COM
Guest

Posted: Sat Aug 14, 2010 3:04 pm Post subject: Elevator trim arms, brakes, nose gear torque tube.

he's coming back in October for all new calipers and brakes.



From: grumpyparts <i.r.m(at)btinternet.com>

To: teamgrumman-list(at)matronics.com

Sent: Sat, August 14, 2010 12:18:35 PM

Subject: Re: Elevator trim arms, brakes, nose gear torque tube.



   



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