PS Magazine - TB 43-PS-693
PS, The Preventative Maintenance Monthly
ISSUE 693
AUGUST 2010
38
PS 693
AUG 10
39
PS 693
AUG 10
m
echanics, the results are always bad if you go
overboard and overFll your Kiowa Warrior’s tail
rotor gearbox and overgrease the bearings inside
the pitch control mechanism.
Do only what TM 1-1520-248-23 says and
consider it enough. As you add oil to the gearbox,
allow a few seconds for the oil to stabilize before
you read the site gage to see if the oil is at the
indicator line. That way you won’t add too
much.
If you’re too hasty, you’ll overFll the gearbox.
The excess oil runs down the output shaft during
operation and gets into the trunnion and Teflon®
bearings.
When you use too much grease on the pitch
control mechanism bearing, the extra grease gets
into the boot, Flls it up and pumps it into the
gearbox, contaminating it.
E
very now and then brute strength is
needed to move bulky, heavy items.
When it comes to Chinook components,
there’s one problem, though. Overconf-
dence in your muscle power to liFt heavy
components can get you and others hurt
and damage equipment.
When removing either the Forward or aFt
swash plate From the aircraFt, always use a
sling, NSN 1730-00-179-1326, and a hoist to
liFt it like it says in TM 1-1520-271-23&P and
TM 1-1520-240-23&P. Search the IETM on the
LOGSA website using EM-0281.
Some mechanics mistakenly think they
can liFt the swashplate using the drive arm
lugs as carrying handles. The drive arm lugs
are not saFe handholds For liFting the swash-
plate! When liFting the swashplate by the
drive arm lugs with your hands, the lower
portion oF the swashplate can rotate and
crush or break your fngers and hands. IF that
happens, you’ll drop the plate, damage it
and Further injure yourselF or someone else.
Remember, brute strength is not enough
to maneuver heavy components in every
maintenance task. That’s why you should
use liFting devices when handling heavy
components.
OH-58D…
That’s Enough
oil
and
grease!
CH-47D/±…
When removing
swashplate…
…never liFt it using drive arm lugs
so go easy
with the oil and
grease, and you’ll
avoid a messy
cleanup.
after I grease
these bearings,
it’s on to filling
the gearbox
with oil!
don’t
get too
grease-
and-oil-
happy or
you’ll be
cleaning
up a
mess!
I’m strong!
I
think I’ll remove
this swashplate
by hand.
you may be army strong,
but you’ll still need to
use a sling and a hoist
to lift my swashplate!
Strength
is
Not
Enough!
693.38-39.indd
1-2
6/25/10
3:00:54 PM
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