NOTE
Never paint
working surfaces of
the bearing cups.
a.
Bearing Cup
Replacement:
1. Removal:
(a) Insert wheel half into
boiling water for 15 minutes or
place in an oven not
exceeding
250°F (121°C)
for 15 minutes.
(b) Remove from
source of heat
and invert wheel
half. If the cup
does not drop
out, tap the
cup evenly from
the axle bore
with a fiber drift
pin or suitable
arbor press.
2. Installation:
(a) To
replace a new
cup, apply one coat
of zinc chromate
primer to wheel
half
bearing bore.
(b) Insert wheel
half into boiling
water for 15
minutes or place
in an oven not
exceeding
250°F
(121°C) for 15
minutes. Chill
new bearing cup
in dry ice
for a minimum
of 15
minutes.
(c) Remove wheel
half from source of heat and
bearing cup from the dry ice.
Install the chilled
bearing cup
into the bearing
bore of the heated
wheel half.
Tap gently to seat
evenly in place, using a fiber
drift pin or suitable arbor
press.
6-27. BRAKE SYSTEM.
6-28.
WHEEL
BRAKE
ASSEMBLY.
6-29. BRAKE ADJUSTMENT AND
LINING TOLERANCE. No adjustment
of the brake
lining clearance
is necessary
as they are self-adjusting.
Inspection of
the lining is necessary,
and
it may be inspected
visually while installed
on the airplane.
The linings are
of the riveted
type and should
be replaced if the
thickness of any
one segment becomes
worn below .100
of an
inch or unevenly
worn.
6-30. REMOVAL
AND DISASSEMBLY OF WHEEL
BRAKE ASSEMBLY. (Refer
to
Figure 6-10.)
a. To remove the
brake assembly, first disconnect
the brake line from the brake
cylinder
at the tube
fitting.
b. Remove
the cap bolts that join the brake cylinder
housing and the lining back plate
assembly.
Remove the back plate
from between the brake disc and
wheel.
c. Slide the brake
cylinder housing from
the torque plate.
d. Remove the
pressure plate by sliding it off the
anchor bolts of the housing.
e. The piston(s) may
be removed by injecting low air pressure
in the cylinder fluid inlet
and forcing
the piston from
the housing.
f. Check anchor
bolt for
wear.
LANDING GEAR
AND BRAKE
SYSTEM
Revised:
6/18/76
PIPER CHEROKEE
SIX SERVICE
MANUAL
2B7
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