PS Magazine - TB 43-PS-602
PS, The Preventative Maintenance Monthly
ISSUE 602
JANUARY 2003
After the tool is made, we fol-
low the TM procedure as required.
After the washers are in place on
the yoke, seat the plates on each
end of the yoke. Insert the bolt
from the bottom of the yoke
through the plate’s holes. Attach
the nut and tighten it with two
wrenches until the sealing com-
pound squeezes out uniformly.
Continue to follow the rest of the
procedure as required.
Sgt Andres Chamorro, Jr.
MAARNG
Dear Rotor,
The teflon-coated bearing sleeves, NSN 3120-01-139-2099, and the
teflon-coated washers, NSN 3120-01-107-4189, are difficult to install on
the UH-60’s tail landing gear yoke.
The procedure in Paras 3-4-25.5 and 3-4-25.6 of TM 1-1520-237-
23-3 takes several hours for each aircraft and still the washer won’t always
line up properly on the yoke. We often have to redo the procedure.
The procedure uses a C-clamp and two wooden blocks on the yoke. Then
it has us apply pressure to the bearing sleeves and the washers to make sure
the sealing compound is squeezed out uniformly around the washers.
This method forces the washers out of alignment on both the top and
underside of the yoke. If the adhesive on the seal dries on the yoke, it’s dif-
ficult to insert the fork assembly through the yoke with off-center washers.
But we’ve come up with a reversible teflon bearing washer tool that’ll insert
the bearing sleeve and seat the washer properly.
The new tool prevents
damage to the new washer
and yoke during installation,
and cuts our repair time to
30 minutes.
Here are the materials
and dimensions an AVIM
shop can use to make a
bearing sleeve tool. Make
the tool from aluminum bar,
NSN 9350-00-236-
3184, like so:
3.625
3.615
DIA.
3.490
3.480
DIA.
4.50 DIA.
.140
.255
.50
.515
.505
DIA. THRU
(Make two of these)
You’ll also need a
1
/
2
-13 x 13-in bolt and a
1
/
2
-13 nut.
.750
.323
7.750
1.750
.500
1/2-13 THREAD
0.500
.750
.323
1/2-13
NUT
…tighten with
two wrenches
Install tool
on yoke…
UH-60…
OH, NO!
Not the tail
landing
gear again!
the last time
I repaired that,
I was using
a c-clamp and
wooden blocks
and it took
forever!
use this
tool on the
yoke assembly
instead.
It’ll save
time and you
won’t have
to redo the
procedure.
PS 602
Another great tool
for a mechanic’s
arsenal!
41
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