PS Magazine - TB 43-PS-584
PS, The Preventative Maintenance Monthly
ISSUE 584
JULY 2001
M
echanics, when it’s time to service the Apache’s hydraulic system but the fluid
won’t flow, check the in-line filter behind the servicing connection.
If you remove the filter, you may find a small ball of rubber. That ball started out
as a sliver of rubber cut from the servicing tube.
Here’s the bounce on the rubber ball:
When you grab a can of hydraulic
fluid and punch holes in the lid with a
screwdriver, then bend in or pull out the
lid with pliers, you create sharp, jagged
edges around the can’s opening.
As you insert or remove the servicing
tube, the edges slice off bits of rubber
that drop into the fluid. There, they lodge
in the filter and block the flow of fluid.
Using a metal braided hose instead of a rubber hose is not the solution, either.
The braided hose gets raked by the jagged edges and pieces of metal wind up in the
hydraulic system, too.
The only solution is to not cre-
ate jagged can edges and to be
extra careful when you place the
hose or tube in the can.
During the next scheduled serv-
ice, open the can with a can opener,
then bend the sharp edges inward
and under. If you don’t have a can
opener handy, create a wide open-
ing so the tube can be inserted
without scraping the sharp edges.
PS 584
JUL 01
\
AH-64A.
..
PS 584
JUL 01
35
Make sure there
are no jagged
edges around
opening
R
E
T
U
R
N
PRIMARY
FLUID
FILL
Check filter
behind
connection
584. 34-35 (C)
5/28/01
8:35 PM
Page 1
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