PIPER
SENECA
II
SERVICE
MANUAL
13-58. DISASSEMBLY(45,000BTUHEATER). (Refer
to
Figure 13-19.)
a.
Remove the screw and slide the elbow adapter (23)
off
the combustion air inlet tube.
b. Disconnect and remove electrical wiring and individual wires from the various components on the
heater.
If
wires appear to
be
in good condition,
it
may be desirable
to
remove wire harness assembly intact.
First disconnect wires
at
terminal strip and components.
NOTE
It
is advisable
to
label all wires, prior
to
removal,
to
insure correct
connections during reassembly. Cable straps and clips must be
replaced
if
removed,
as
they cannot be reused.
c.
Carefully disconnect the high voltage ignition lead
at
the spark plug. Handle the spring connector
on the end
of
this lead with care
to
prevent fouling or damage.
d.
Remove the four screws and cable straps
to
free the ignition assembly (2) from the heater jacket
and remove the ignition assembly. The vibrator may be removed by releasing the clamp and exerting a firm
pull straightaway from the ignition assembly case.
e.
Remove the grommet (39) from the jacket (5) and remove the spark plug (32) with a 7
/8
inch
deep socket.
Make
sure the spark plug gasket is removed.
f.
Remove the two screws and lift
out
the overheat (limit) switch (25) and spacer gaskets (27).
g.
Remove the two screws and lift
out
the cycling switch (24).
h. Remove the four screws to release the terminal strip (35) and insulator (36) from the jacket (5).
i. Disconnect the tube fitting (33)
at
the cover
of
the combustion air pressure switch (26). Refer
to
Paragraph 13-39,
a,
Step 1 for precaution on tube bending. Unscrew and remove the combustion air
pressure switch (26) from the combustion air inlet tube.
j. Remove vent air inlet adapter (16) from the blower housing by removing the three screws.
k. Loosen the four screws (20) and rotate the blower and motor housing (11) to disengage the
notched end from the four screws in the end
of
the heater jacket. Disconnect the motor wiring
quick-disconnect.
1.
Remove the upper fuel shroud box cover (10) by removing the screws.
m.
Remove the grommet from the fuel shroud (9) and carefully pull the fuel solenoid wires through
the hole in the shroud.
n. With
an
open end wrench, remove the fuel solenoid assembly being careful
not
to
damage the
wires on the solenoid.
o. Reach inside the inlet end
of
the jacket assembly (5) with a
3/4
inch open-end wrench, and while
holding the fuel-tube fitting
at
the jacket, use a
3/4
inch deep socket
to
remove the elbow (34),
nut
(38),
washer (
41
), gasket (29) and fuel shroud (9).
p. Remove the two screws and carefully withdraw the nozzle holder (8) from the combustion head
assembly (6); remove gasket (28).
q. Remove the
six
screws and withdraw the combustion head assembly (6) from the combustion
tube assembly (7). Remove gasket (30).
r. Remove the screws and remaining cable straps,
if
not
previously removed, from the seam
of
the
jacket assembly (5). Note the position of the cable straps
as
they are removed. Spread the jacket at the
seam and remove it from the combustion tube assembly (7). This will free the asbestos gasket (31) which
can be removed from the particular part
to
which it remains attached.
s.
Carefully unscrew and remove the spray nozzle (21) from the nozzle holder (8). Remove the
gasket (28).
Reissued:
10/11/79
HEATING
AND
VENTILATING
SYSTEM
2K15
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