PIPER
SENECA
II
SERVICE
MANUAL
13-53. DISASSEMBLY (30,000 BTU HEATER). (Refer
to
Figure 13-18.)
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. The ventilating air blower housing must be
removed
so
that the two motor wires quick-disconnect may
be
released.
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 re-used.
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, lock washers, and cable straps
to
free the ignition assembly (2) from the
heater jacket and remove the ignition assembly. The vibrator may be removed by exerting a firm pull
straightaway from the ignition assembly case after releasing the
nut
and screw.
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, lock washers and plain washers, and lift
out
the overheat (limit) switch
(25) and spacer gaskets (27).
g.
Remove the two screws, lock washers and plain washers, and lift
out
the cycling switch (24).
h. Remove the four screws and lock washers 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 and
lock washers.
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 assembly ( 10) by removing the screws.
m.
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 nut (38), washer and
gasket (29).
n. Remove the combustion head assembly ( 6) and the gasket (30) from the combustion tube
assembly (7) by removing the screws and washers.
o. Remove the two screws and lock washers; then carefully withdraw the nozzle holder and
valve
assembly from the combustion head assembly ( 6).
p. Remove the screws, lock washers and remaining cable straps, if
not
previously removed, from the
seam
of
the jacket assembly (5). Note positions
of
cable straps as they are removed. Spread the jacket (5) at
the seam and remove it from the combustion tube assembly (7). This will free the rope gasket (31 ), which
can be removed from the particular part
to
which it remains attached.
q. 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
2Kll
To Next Page
Loading...
