Source for tail spring shackle?
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- mmcmillan2
- Posts: 161
- Joined: Sat Jul 04, 2020 9:30 pm
Source for tail spring shackle?
It seems the pin on my tail wheel spring shackle is worn. Does anyone know where the pin itself could be sourced, then pressed in? Am correct in assuming the pin just sits in the hole in the leaf spring?
0542108 is the part number
0542108 is the part number
170B owner, KCFD, CFI(I), ATP Multi
Re: Source for tail spring shackle?
I believe there is an L-19 shackle for sale on eBay. It might be the same, I’m not sure.
N1235D - 1951 170A - SN: 20118
- cessna170bdriver
- Posts: 4062
- Joined: Mon Apr 22, 2002 5:13 pm
Re: Source for tail spring shackle?
As far as I can tell, the purpose of that pin is to keep the shackle from sliding down the spring, so there shouldn’t be a great amount of stress on it I made one out of a #8 screw, using my drill press and a file as a poor-man’s vertical lathe.
Don’t forget the sheet aluminum “chain guard” across the bottom.
Don’t forget the sheet aluminum “chain guard” across the bottom.
Miles
“I envy no man that knows more than myself, but pity them that know less.”
— Thomas Browne
“I envy no man that knows more than myself, but pity them that know less.”
— Thomas Browne
Re: Source for tail spring shackle?
The L-19 website is a more respectable source than Ebarf: airrepairinc.comdstates wrote:I believe there is an L-19 shackle for sale on eBay. It might be the same, I’m not sure.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
Re: Source for tail spring shackle?
If you were to use an L-19 shackle I think you'd have to add a shim as the main tail leaf spring is thicker on the L-19. Could buy the shackle just for the pin I suppose but like Miles' idea of just making a replacement pin.
Gary
- Bruce Fenstermacher
- Posts: 10318
- Joined: Tue Apr 23, 2002 11:24 am
Re: Source for tail spring shackle?
For years my until I got involved my partner simply placed a nice size ball bearing between the spring indent and the hole in the shackle left after pressing out what was left of the pin. It worked fine.
The smart ass new partner (me) didn't want to keep track of the ball bearing on disassembly so I, wasting my time according to my partner, made a new pin out of nothing special and pressed it in. Painted it and it looked brand new. Of course we made a log entry.
The smart ass new partner (me) didn't want to keep track of the ball bearing on disassembly so I, wasting my time according to my partner, made a new pin out of nothing special and pressed it in. Painted it and it looked brand new. Of course we made a log entry.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
- mmcmillan2
- Posts: 161
- Joined: Sat Jul 04, 2020 9:30 pm
Re: Source for tail spring shackle?
Part 17 guard is definitely missing, there are two extra washers in its place.
170B owner, KCFD, CFI(I), ATP Multi
-
- Posts: 3481
- Joined: Sat May 06, 2006 6:05 pm
Re: Source for tail spring shackle?
If it was mine, I would clean up the shackle bracket and find a soft round head steel rivet (that looks like the original) and is the correct diameter to fit in the spring hole and silver solder it in place.
Or fabricate a soft steel pin from rod stock of the correct diameter, round off the head area to look like the original and silver solder that in place.
The shackle bracket should be mild steel and not heat treated so silver soldering should not hurt anything, is permanent, but can be un-soldered and replaced if it ever wears out.
Or fabricate a soft steel pin from rod stock of the correct diameter, round off the head area to look like the original and silver solder that in place.
The shackle bracket should be mild steel and not heat treated so silver soldering should not hurt anything, is permanent, but can be un-soldered and replaced if it ever wears out.
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
Re: Source for tail spring shackle?
For those not familiar... the “Guard” (Item 17) is necessary to prevent the steering chain (which becomes slack in certain tight-steering or brake-assisted turns) from catching beneath the shackle and thereby preventing the tailwheel from following steering-commands. This has resulted in departures from the intended-path of the aircraft and departures from runways/taxiways.mmcmillan2 wrote:Part 17 guard is definitely missing, there are two extra washers in its place.
The “guard” can be easily fabricated, and I’ve also seen a short piece of rubber fuel hose slipped onto the shackle-bolt beneath the leafspring to accomplish the task.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
- cessna170bdriver
- Posts: 4062
- Joined: Mon Apr 22, 2002 5:13 pm
Re: Source for tail spring shackle?
I don’t know if it was the one from the factory, but the wrinkled up one that came to me on the airplane was 0.016 aluminum, so that’s that I fabricated a new one out of.mmcmillan2 wrote:Part 17 guard is definitely missing, there are two extra washers in its place.
Miles
“I envy no man that knows more than myself, but pity them that know less.”
— Thomas Browne
“I envy no man that knows more than myself, but pity them that know less.”
— Thomas Browne
- mmcmillan2
- Posts: 161
- Joined: Sat Jul 04, 2020 9:30 pm
Re: Source for tail spring shackle?
FYI, the L19 part is the same dimensions as what I have installed on the plane. Does this fall under owner maintenance?
14 CFR Appendix A Part 43 C - 26
(26) Replacement or adjustment of nonstructural standard fasteners incidental to operations.
14 CFR Appendix A Part 43 C - 26
(26) Replacement or adjustment of nonstructural standard fasteners incidental to operations.
170B owner, KCFD, CFI(I), ATP Multi
Re: Source for tail spring shackle?
It falls under 14CFR Part 43 Appdx Z, “Owner Discretion”.mmcmillan2 wrote:FYI, the L19 part is the same dimensions as what I have installed on the plane. Does this fall under owner maintenance?
14 CFR Appendix A Part 43 C - 26
(26) Replacement or adjustment of nonstructural standard fasteners incidental to operations.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
- mmcmillan2
- Posts: 161
- Joined: Sat Jul 04, 2020 9:30 pm
- mschlender
- Posts: 134
- Joined: Mon Jun 03, 2002 1:27 am
Re: Source for tail spring shackle?
Main spring looks old
- mmcmillan2
- Posts: 161
- Joined: Sat Jul 04, 2020 9:30 pm
Re: Source for tail spring shackle?
How does one determine when it needs to be replaced? My limited spring knowledge is that springs wear from use (flexing back and forth), not so much tied to time. I agree, the paint does look old.mschlender wrote:Main spring looks old
170B owner, KCFD, CFI(I), ATP Multi