PIPER
SENECA
II
SERVICE
MANUAL
r. Center the fuel fitting in jacket opening. Position the fuel fitting shroud gasket (29), washer (41)
and shroud (9); then install the nut (38) finger tight. Insert a
3/4
inch open-end wrench inside the jacket
and hold the fuel-tube fitting while tightening the nut (38) with a
3/4
inch deep socket. Install the fuel
solenoid elbow (34) and solenoid (22). Avoid twisting or damaging lead. Install wires through grommet in
lower shroud (9). ·
s.
Rotate the combustion air switch (26) onto the threaded fitting
on
the combustion air tube and
tighten
it
firmly.
t. Install grommet (47} over pressure switch line. Connect the tube
to
the elbow fitting (33) on the
combustion air pressure switch (26).
u. Install the wiring harness and connect all wire leads to their respective terminals. (Refer
to
the
wiring diagram, Figure 13-7.) Place the grommet (45, Figure 13-19) in position in the jacket (5); locate the
ventilating air blower ( 11) at the end
of
the jacket. Thread the quick-disconnect on the motor leads through
the grommet and connect
it
to the mating connector
on
the wiring harness.
v.
Place the blower housing in position on the jacket assembly (5) and secure it by installing the
four screws (20),
if
removed at disassembly. This operation
is
easier
if
the screws (20) are started into their
threads and the blower housing rotated into place allowing the screws to enter the notched openings in edge
of
blower housing. Tighten all screws securely.
w.
Install the elbow adapter (23) with the screw.
x. After heater
is
installed in the aircraft and the fuel line
is
connected, install the upper fuel shroud
box ( 10) with the screws. Ascertain that the grommet ( 40)
is
installed.
13-68. REASSEMBLY OF COMBUSTION AIR BLOWER ASSEMBLY (45,000 BTU). (Refer to Figure
13-21.)
a.
Place the spacer (15) over the end
of
the motor shaft and attach the motor assembly (5)
to
the
inner housing (8) with the two self-locking nuts ( 17), flat washers ( 16) and lock washers (00).
b. Slide the blower wheel (7)
on
the motor shaft and tighten the set screw (6) lightly against the flat
portion
of
the
motor
shaft.
c.
Place the outer blower housing (3) in position
on
the inner housing (8) and install screws ( 18).
d. Attach the radio-noise filter ( 10) at the point shown with the screw. The motor ground lead
terminal can be grounded to the motor support bracket ( 13).
e.
Loosen the Allen-head set screw in the blower wheel (7) and shift the wheel on the motor shaft
until
it
is
near the inlet in the blower housing. Tighten the set screw securely. The blower wheel should just
clear the inlet flange when rotated at full RPM. Spin the blower wheel by hand for clearance check; then
apply proper voltage
to
run motor and recheck for proper clearance.
f.
Attach the blower inlet adapter (2)
to
blower housing (3) with screw ( 18).
13-69. TEST PROCEDURE.
13-70. GENERAL
INFORMATION.
A test
of
all components should have been made after overhaul to
insure proper operation. Some shops may
not
have complete testing facilities for measuring airflows,
pressure drops, and other factors which would be accomplished in a laboratory-type test.
If
such a test
cannot be made, install the heater and check operation on the ground and in the air
to
determine
if
operation
is
normal. In shops where complete test equipment
is
available and a complete functional test can
be performed, the test routine described in subsequent paragraphs should be made.
Reissued:
10/11/79
HEATING
AND
VENTILATING
SYSTEM
2L5
To Next Page
Loading...
Need help?
General