PIPER
SENECA
II
SERVICE
MANUAL
13-49. ASSEMBLY
OF
PUMP. (Refer
to
Figure 13-15.)
a. Insert the plunger ( 4) into the tube with the buffer spring end first. Check fit by slowly raising
and lowering the plunger in the tube.
It
should move fully without any tendency
to
stick. If a click cannot
be heard, the interrupter assembly
is
not
functioning properly in which case the pump should be replaced.
b. Install the plunger spring (5), cup valve (6), O-ring seal (7) and washer (8).
c.
Compress spring (5) and assembly retainer (9) with ends
of
retainer in side holes
of
tube ( 4
).
d.
Place the cover gasket
(11)
and magnet
(10)
in the
bottom
cover
(12)
and assemble the filter (3)
and cover assembly.
e. Twist the cover by hand to hold in position on pump housing. Using a 5/8 inch wrench, securely
tighten the
bottom
cover with the bayonet fittings
on
the pump body and install safety wire.
13-50. INSTALLATION OF HEATER FUEL
PUMP.
a. Position
the
fuel pump into the compartment and secure in place with bolts.
b. Connect
the
regulator
to
the pump
outlet
and the fuel line
to
the pump inlet.
c.
Connect the electrical lead from the pump.
d. Operate the heater to make sure the unit
is
functioning properly. (Refer
to
Paragraph 13-5,
Heater System - Operational Test.)
e. Replace all access
<!overs
removed
to
service the system.
13-51. DUCT SWITCH. (Refer
to
Figure 13-20
or
13-21.)
a.
Removal:
1.
Disconnect the electrical leads from the terminals
on
the exposed face
of
the switch and
mark
to
facilitate installation.
2. Remove
the
two attaching screws and washers from the
duct
switch bracket.
3. Carefully lift
out
the switch and gasket (if gasket
is
used).
b. Cleaning and Inspection:
1.
Brush
off
any dust
or
lint from
the
switch operating mechanism (exposed inside the duct)
and wipe
the
external surfaces with a clean cloth.
c.
Installation:
1.
Insert the switch carefully with gasket (if used) into the ventilating duct opening and secure
with the two attaching screws and washers.
2.
Connect the two electrical leads
to
their respective terminals on the face
of
the switch as
marked during removal.
3. Operate the heater with the duct switch set above ambient temperature to check operation.
Refer
to
Paragraph 13-72, Step 1 for additional switch tests and setting instructions.
13-52.
DELETED.
Revised:
12/08/83
HEATING
AND
VENTILATING
SYSTEM
2K10
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