Trim Tab Jack Screw

How to keep the Cessna 170 flying and airworthy.

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MoonlightVFR
Posts: 624
Joined: Sun Jan 02, 2005 5:55 pm

Trim Tab Jack Screw

Post by MoonlightVFR »

I do not have a complaint about trim tab Jack Screw on C170B s.n. 26433

It has received very little attention. What to do?

Can I lube the jack screw without removal and disassembly?

IPC gives info on this component.

What should owner / operator be doing on a regular basis?

LPS 2 or Pastey grease?
gradyb, '54 B N2890C
n3833v
Posts: 857
Joined: Tue Apr 23, 2002 6:02 pm

Re: Trim Tab Jack Screw

Post by n3833v »

I use a light spray grease. Run from end to end as you lube.

John
John Hess
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GAHorn
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Re: Trim Tab Jack Screw

Post by GAHorn »

25 years ago I was taxying out in my 206 for a ride into town rather than drive... since I had to fly a friend to So. TX that afternoon. On the taxy-out I set trim tab...or tried to...and it wouldn't move. The airplane had been flown only a week previously.
The screwjack was frozen solid on a warm day. 8O
Taxied back to the hangar and removed the trimjack, disassembled it and found it dry inside... no lube at all.
I cleaned it with WD40 …(what else!)… lubed it with ordinary marine trailer bearing grease...and it worked perfectly for the next 3 years until I sold the airplane.

It's not difficult to remove it and to disassemble, clean, inspect, lube and reinstall. Takes about an hour total. (Don't move the trim wheel meanwhile)
'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. ;)
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