Engine Primer Installation; Manual Primer; Primer Removal, Disassembly, Cleaning And Assembly; Primer Installation - Piper PA-44-180 SEMINOLE Maintenance Manual

ENGINE PRIMER INSTALLATION (Refer to Figure 73-2.)
The PA-44-180 and PA-44-180T, as shown in Figure 73-2, utilize different systems. The PA-44-180 uses hand
pumps, except on S/N 44-95001 and up, high pressure electric pumps for priming are utilized and the PA-44-
180T uses high pressure electric pumps for the priming system.
MANUAL PRIMER (PA-44-180).
The PA-44-180 primer pumps, one for each engine, are mounted on the control pedestal above the cowl flap
lever. Each primer can be operated, after rotating the handle to unlock it, by pulling and pushing the handle to
create a pressure. Fuel is forced through the related primer lines and jets mounted in the bottom of each intake of
the number 2, 3 and 4 cylinders.
REMOVAL OF PRIMER (PA-44-180). (Refer to Figure 73-2.)
1. Disconnect the fuel lines from the primer behind the instrument panel.
2. Loosen the locknut from behind the panel.
3. Unscrew the knurled face nut and remove the pump handle and piston from the cylinder.
4. Remove the remaining portion of the primer.
DISASSEMBLY, CLEANING AND ASSEMBLY OF PRIMER (PA-44-180). (Refer to Figure 73-2..)
1. The primer may be further disassembled after removal by removing the screws, springs and check balls
from the end of the cylinder housing.
2. Clean the primer parts with acetone or a dry type solvent.
3. Install new O-rings to the piston and lubricate with light motor oil.
4. Install the balls, springs and screws to the cylinder housing.
5. Insert the pump handle and piston into the cylinder and finger tighten the knurled face nut.
6. Immerse the pump in gasoline and operate several times to insure proper operation.
INSTALLATION OF PRIMER (PA-44-180). (Refer to Figure 73-2.)
1. Remove the pump handle and piston by unscrewing the knurled face nut, if previously installed.
2. Insert the cylinder assembly through the back side of the panel.
3. Insert the piston into the cylinder and tighten the knurled face nut.
4. Position the primer and tighten the locknut on the cylinder behind the panel.
5. Connect the fuel lines to the primer.
6. Disconnect the primer line inside the engine compartment. Operate the pump to ascertain proper operation.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3F5
7 3 - 1 2 - 0 4
Page 73-03
Revised: May 15, 1989