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ring (1), and
the
scraper
ring (2). Force
the
barrel
end
REASSEMBLY
OF SHIMMY
DAMPENER
(3) out of
the
barrel
by working
the
piston
back
and
forth.
Remove
the
"O"
rings
(4) from
the
barrel
end.
a.
Slide
the
scraper
ring,
barrel
end and piston
on
the
piston
rod.
Engage
the
floating
piston
with
a
thread-
b.
Remove
all remaining
hydraulic
fluid
from
the
ed rod and pull
it
toward
the
clevis
end of
the
piston
shimmy
dampener.
rod so
the
piston
retaining
pin can be installed.
c.
Remove
the
forward
snap
ring
(5) and slide
the
b.
Slide
the
piston
rod and assembled
parts
into
the
piston
rod
(6)
and parts
out of
the
barret.
barrel
and install
the
aft snap
ring.
d. Hold
the
washer
(7) down and remove
the
cotter
pin
c.
Place
the
dampener
in a
vise
with
the open end
up
(8); remove
the
washer
and compression
spring
(9),
and fill
the
barrel
and
piston
rod
with
MIL-H-5606
hy-
draulic
fluid.
Work
the
piston up and down
until
bubbles
e. Remove
the
ait floating
piston
(10) with a 6-32 screw
stop appearing
in
the
fluid in
the
piston
rod.
Refill
the
and remove
the
"O"
ring
(11).
barrel
with hydraulic
fluid
and install
the
remaining
barrel
end. Make sure
the
barrel
is full enough so
there
f
Insert
a long 6-32 screw
into
the
hole at
the
clevis
is no air pocket
under
the
barrel
end.
If
the
barrel
is
end of
the
piston
and engage
the
floating
piston
(12),
overfilled,
the
excess
fluid will be forced
into the pis-
Maintain
tension
on
the
floating
piston
while
driving
ton
rod as
the
barrel
end is slid into position.
out
the
piston
retaining
pin
(13),
d,
Fill
the
piston
rod with hydraulic
fluid.
Engage
g.
Release
the
floating
piston
slowly
and push
it out
the
lower floating
piston
with a
threaded
rod.
Pull down
the
open end of
the
piston
rod and remove
the
"O" ring
on
the threaded
rod and at
the
same
time
push
down
(14).
on
the
upper
piston
so it will follow
the
column
of fluid
down
in
the
piston
rod and prevent
the
entry
of air.
A
h.
Remove
the
remaining
compression
spring
(15)
tool
which
will aid in compressing
the
spring
and in-
from
the
rod and
slide the
piston
(16)
off
the
piston
rod,
stalling
the
cotter
pin can be made out of a piece of
tub-
Remove
the
"O" rings
(17) from
the
piston.
ing small
enough
to
fit inside
the
piston
rod and at least
six inches
long,
Cut a 1/4 inch slot,
large
enough
to
i. Remove
the
barrel
end (18), "O" rings
(20), and
the
accommodate
the
cotter
pin,
in one end of
the
tubing,
scraper
ring
(19) from
the
piston
rod,
Place
a stiff wire
through the
washer
and spring
down
into
the piston
to
act as a guide while
the
spring
is being
Clean all parts
with Federal
Specification
PD-680
sol-
compressed.
Compress
the
spring
with the slotted
end
vent
and inspect
for cracks,
corrosion
and distortion.
of
the tubing,
remove
the
guide
wire,
and install
the
Replace
all "O" rings
with
those
approved
for use with
cotter
pin.
Spread
the
portion
of
the
cotter
pin
within
mineral
base hydraulic
fluid.
Lubricate
all parts
with
the
piston
rod and insert
a wire
until
it bottoms
in
the
MIL-H-5606
hydraulic
fluid prior
to
assembly.
floating piston.
If
the
wire enters
the
piston
rod
over 2-
4
5
6
7
10
17 14
12
13
3
1
15 8
16
11
1.
Snap
Ring
9.
Cotter
Pin
2.
Cylinder
10. Collar
3.
Clevis
11.
Cotter
Pin
4.
Check
Nut
12. Flow Lock Piston
5.
Washer
13. Return
Spring
6. Piston
Guide
14.
Piston
Bushing
15. "O" Ring
7. Retainer
"O"
Ring
16.
Spring
Washer
8.
Rear
Sest Washer
17.
Valve
Stop
Figure
5-9.
Brake
Master
Cylinder
5-15
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Table of Contents
Troubleshooting
