PA 28 Trim Wheel Lubrication

[Mike Spera]

The floor mounted trim wheel on my Cherokee has always been a little
stiff to move. Others I have flown are usually pretty smooth and free.
The jack screw on the tail is well greased and the pulleys along the way
are moving freely. It appears the drag is in the wheel mechanism itself.
What is the procedure to lubricate this assembly? Do you need to
secure the control cables before disassembly? Please reply to the group
and me. For some reason, my provider's service has been dropping posts
and replies recently.

Thanks,
Mike

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Mike Spera > wrote:
: The floor mounted trim wheel on my Cherokee has always been a little
: stiff to move. Others I have flown are usually pretty smooth and free.
: The jack screw on the tail is well greased and the pulleys along the way
: are moving freely. It appears the drag is in the wheel mechanism itself.
: What is the procedure to lubricate this assembly? Do you need to
: secure the control cables before disassembly? Please reply to the group
: and me. For some reason, my provider's service has been dropping posts
: and replies recently.

I'd try to take a look at the routing of the cables heading back to the tail.
See if they have eaten into their fiber blocks going through bulkheads. Other than
that, mine has the overhead trim, so I'm not sure how the floor-flavored versions
work.

-Cory

--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************

[tom418]

From my Seneca's M/M; (Yours should be similar):
"Trim Control Wheel moves with excessive resistance:
Cause(s): System not lubricated properly
Cable Tension too high
Pulleys binding or rubbing (another poster mentioned this
one)
Cables not in place on pulleys
Trim tab hinge binding
Cables crossed or routed incorrectly (forget that one, unless
some elf tampered with your plane)
YES, you need to secure the trim cables before disassembly.
This means blocking the cables at the pulleys in the tail cone.

According to M/M, the trim wheel should be lubed with a MIL L-7870 type
lubricant. I use Royco 363. I bought a gallon can of this from Aviall a few
years ago. I'm still using it. HTH


"Mike Spera" > wrote in message
...
> The floor mounted trim wheel on my Cherokee has always been a little
> stiff to move. Others I have flown are usually pretty smooth and free.
> The jack screw on the tail is well greased and the pulleys along the way
> are moving freely. It appears the drag is in the wheel mechanism itself.
> What is the procedure to lubricate this assembly? Do you need to
> secure the control cables before disassembly? Please reply to the group
> and me. For some reason, my provider's service has been dropping posts
> and replies recently.
>
> Thanks,
> Mike
>
>
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