(12).
r.
s.
PIPER
SENECA
II
SERVICE
MANUAL
CAUTION
Handle the nozzle with care
to
avoid damage
to
the tip. The
material around the orifice is very thin and any sharp blow on the
face
of
the
nozzle can distort the spray pattern and cause
malignition
or
improper combustion.
Remove the fuel solenoid assembly (22) by removing the nipple (37) and elbow (34).
Loosen the
nut
and remove the screw, flat washer, and rubber grommet from blower housing
t. Remove the two screws, flat washers, and rubber grommets at the other two locations around the
blower
motor
housing ( 12).
u. Slide the ventilating air blower
motor
out
of
the blower housing ( 12) with the
motor
bracket
assembly ( 19) and blower wheel ( 17) attached. Loosen the set screw in the blower wheel ( 17) and slide
it
off
the
end
of
the motor shaft. The flat washers and rubber washers will fall
out
when the bracket
is
removed. Then remove the motor bracket assembly ( 19).
If
these parts are in good condition, they need
not
be disassembled further.
v.
Remove
the
screw and lock washer
to
free the capacitor assembly (18) with attached leads.
13-54. DISASSEMBLY
OF
COMBUSTION AIR BLOWER ASSEMBLY (30,000 BTU). (Refer to Figure
13-20.)
a. Remove
the
combustion air blower inlet adapter (2)
by
removing three screws, lock washers,
cover plate and gasket.
b. Remove
the
outlet adapter (5) by removing
the
two
screws (6) and lock washers (7).
c. Remove
the
inlet flange (8)
by
removing
the
three screws (9) and lock washers ( 10).
d. Remove screws ( 12 and 16) and lock washers (
13
and 17);
then
separate the back plate (20), with
motor
(25) attached, from the blower housing ( 15) and free the
motor
leads and capacitor ( 11) from
the
back plate (20).
e.
Loosen the set screw in the blower wheel ( 19) and slide
it
off
the motor shaft.
f.
Remove the two hex nuts (21), lock washers (23) and flat washers (22), and slide
the
back plate
(20)
off
the
motor
through bolts. The spacer (24) will drop out.
g.
Install new
motor
brushes
as
described in Paragraph 13-27, b.
If
the motor commutator is badly
worn or
if
the
motor
is
defective in any respect,
it
must be replaced.
13-55. CLEANING. (Refer
to
Figure 13-18.)
a. Clean individual metal parts (except those parts containing switches and electrical wiring) and
the
combustion tube assembly
by
immersing them in dry-cleaning solvent, such as Stoddard solvent (Federal
Specification P-D-680). A bristle brush should be used to assist the cleaning process
if
foreign
accumulations are stubborn
to
remove.
Reissued:
10/11/79
CAUTION
Do
not
attempt
to
buff or scrape
off
any deposits
on
face
of
spray
nozzle. The face
of
the nozzle
is
very susceptible
to
damage from
mishandling. Carefully repeat cleaning process using only a bristle
brush and repeated applications
of
solvent
to
loosen any stubborn
deposits.
HEATING
AND
VENTILATING
SYSTEM
2K12
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