Assembly Of Pump; Installation Of Heater Fuel Pump 2Kl0; Duct Switch - Piper SENECA II Service Manual

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