Propeller Governor - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
220
1. CONTROL ARM
2. RPM ADJUSTING SCREW
3. CONTROL WHEEL
4. LOCK NUT
5. BOLT ASSEMBLY
Figure 8-5. Propeller Governor
3.
Reinstall upper engine cowl and repeat Step b to ascertain proper RPM setting.
4.
After setting the proper high RPM adjustment, run the self-locking nut on the fine
adjustment screw against the base projection to lock.
5. Ascertain that the governor control arm (1) is adjusted to the proper angle on the control
wheel (3) as shown in Figure 8-5.
d.
With the high RPM adjustment complete, the control system should be adjusted so that
the
governor control arm will contact the high RPM stop when the cockpit lever is .062 to .125 inch
from its
full forward stop, which is located in the control pedestal. To adjust the control lever travel,
disconnect the
control cable end from the control arm, loosen the cable end jam nut and rotate the end
to obtain the
desired lever clearance. Reconnect the cable end and tighten jam nut.
e. It is usually only necessary to adjust the high RPM setting of the governor control system, as
the
action automatically takes care of the positive high pitch setting.
8-25. ENGINE.
8-26. REMOVAL OF ENGINE. (Refer to Figure 8-6.) The removal of either engine is basically the
same
procedure, though the routing of some wires, cables, lines, etc. does vary between engines. Each line
should
be identified to facilitate reinstallation and covered, where disconnected, to prevent contamination.
a.
Turn off all cockpit switches and then disconnect the battery ground wire at the battery.
b. Move the fuel valve control lever located on the outboard side of the fuel selector panel, labeled
"Emergency Fuel Shut-off," to the OFF position.
c.
Remove the engine cowling per Paragraph 8-4.
d.
Remove the access panels on the top, sides and inboard bottom of the nacelle, just aft of the
firewall.
Reissued: 10/12/79
POWER PLANT
2H22