Filling Oleo Struts - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
2·34.
FiI1iDI
Oleo Strua. To 6U the nose or main ,ar oleo saut with fluid
(MIL·fH606), whether it
be
only the additiol1 of
I
small amount or if the unit has been completely emptied and will require
I
largc
amount,
it
should be filled as follows:
WAANING
Do
not release air by removint the
mgt
valve core or
filler plq.
Depras
thc valve
core pin wu:il
stnlt
chAmber plelalre
bu diminished.
CAUrtON
Dirt Uld
foreip partida form around the filler
piup
of me landirc
,eu
struts.
therefore. before attemptillJ
to
mnove mae piup. me tops
of
the
struts
should
be
cleaned
with
compraRCI
air
a.adJor
'Nidi
a dry
type
solvent.
a,
Place
the airplane
on
jacks.
(Refcno
Jackinl.
Parapapb 2·11.)
b. Placc a pan under tbe
acar
to catch spillqe.
c.
At
the filler
plUJ.
relievc air prellUrc from the
saut
housin,
chamber
by
ranovinJ the cap from
the air valve and depraaiq the valve core.
d.
There
are
twO
methods
by
which
the
stNt
chuabcr
may
be
fUled
and these
ate
u
follows:
First Method:
1. Remove the valve core from the filler
plua
at
the top of
the
DOR
Jar
strut
housirc or at the
tOP
inboard side of the main ,car housing. Allow thc filler pllll
to
razap insaJJed.
2. Amc:b one end of a clean plutic hose to the valve seem of the 6Uer pluS and submCl'Jc the
other cnd in a cOllwncr of hydraulic fluid.
NOTE
An air-alht COftllectioll is nccaury bccwccn the plutic Nbc aDd the
valve sum. Without such a connection, a small
aDlOUllt
of air
will
be
sucked into the oleo
strut
durinl
aeh sequacc,
rclUltinl in an
inordi.D..ue uaount of air bubbles Uld .. proloapd
flllinJ
operation.
3.
Fully
compress and exrcnd the saue thus drawifta fluid from the fluid coallUncr and expdlil'll
air from the
smn
chamber. By watchilll the fluid
pus
throup the
plutic
hose. it can
be
determined when
the strut is full and no air is present in the chamber.
4-. When air bubbles cease to flow throqh the hose. compress the strut
fully
and remove the
hose from the valve stem.
5. With the
strut
compreslCd.
remove the
rl1lcr
plUJ
to
determine that the fluid level
is
visible up
to the bottom of the filler holc.
HANDLING AND SERVICING
REViSED: 413/78
lC7