PS Magazine - TB 43-PS-622

PS, The Preventative Maintenance Monthly

ISSUE 622

SEPTEMBER 2004
PS Magazine - TB 43-PS-622 - Page 20 of 33
a Good Thing
That solves one problem with overfilling. But after you drain the excess fluid,
some of it remains trapped in the hydraulic system and continues to drain from the
line inboard of the front landing gear wheels when the aircraft is moved.
To avoid cleaning up a mess on the hangar floor or on the flight line, place a drip
pan inboard of the front landing gear to catch the continuous drips.
And when servicing your bird’s three hydraulic pump modules, like it says in
Para 1-3-8 of TM 1-1520-237-23-1, go easy on adding fluid. Pour just enough and
prevent overfilling by eyeballing the level indicator as you pour.
That way you’ll escape the hassle of continuous dripping for days on end.
PS 622
SEP 04
36
HH-60L/UH-60A/L…
Too Much of
T
hat’s right, mechanics, put a little too much hydraulic fluid in your Black Hawk’s
hydraulic pump reservoirs and you’ve just committed an overfilling violation.
You can take care of the problem by draining off the excess fluid. Just disconnect
the plastic drain tube from the drain valve of each pump. Place the container at the
bleed valve opening. Press down the bleed valve button and turn the selector valve
handle clockwise for each reservoir to drain the excess fluid from all the pumps.
Reservoirs overfilled?
Remove tube…
…place container at opening,
press down bleed valve…
…then turn selector valve handle
clockwise
for each reservoir
well,
here’s your
drip pan.
better
late than
never!
good
heavens!
what a
mess!
that
other
mechanic
overfilled
my
hydraulic fluids and
didn’t drain off the
excess!!
it ain’t
my
fault!
622.36-37(C)
7/30/04
4:28 PM
Page 1
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