EN-1320
OPERATION AND INSTALLATION MANUAL
(17) Use correct and clean packing. Place the governor onto engine gear box. Drive rod gearing must be
correctly inserted into the gear box drive.
(18) Fix the governor using four bolts (figure 12-7) using suitable wrench. A spring washer is at bolt
head and the second washer is inserted into governor flange recess with chamfer facing governor.
Torque the bolts to 20-24 Nm (180-220 in-lbs). Secure at least three bolts using 0,81 mm
(0.032 inch) stainless steel lock wire (figure 12-7).
Figure 12-7 Governor mounting bolts
(19) If the propeller is not in feather, move it to feather by turning blades to move the beta-ring that it
seats at the propeller hub.
CAUTION: CATCH THE BLADES AT ITS SHANK, NEVER AT BLADE TIP.
NOTE:
It is recommended to move the lever "Rn" to feather stop 16, to facilitate servomechanism movement.
(20) Install the carbon block assembly (figure 12-6) onto the lever "Zv" and the beta-ring. Install the
washer onto the pin and safety with cotter pin 1,6x10.
NOTE: Use new cotter pin each installation.
(21) If hydraulic valve LUN7880 and auxiliary pump LUN7840 are installed, follow this procedure:
NOTE: Refer to figure 12-8.
a) Remove the safety wire from the turning screw. Loosen the turning screw to allow rotation of the
fitting. Do not remove.
NOTE:
The turning screw could be modified with the outlet to provide connecting the manometer as
displayed in figure 12-8. This outlet is plugged with the nut and the ball 5/16”. Do not remove this
nut from the turning screw.
b) Make sure that the pipes are loose at the connection to the auxiliary pump LUN7840 and to the
valve LUN7880. Otherwise remove the safety wire and loosen the nuts.
c) Connect the pipe from the valve LUN7880 to the inlet marked with arrow and lightly tighten the nut.
d) Connect the pipe from the auxiliary pump LUN7840 to opposite inlet of the fitting and lightly tighten
the nut. Make sure that the ball is present inside this inlet before installing the pipe.
e) Evenly tighten the nuts at both ends of the connecting pipes until tight. Prevent the stress at the
connections when tightening the nuts.
CAUTION:
Prevent wobbling of the turning screw when tightening the nuts, otherwise the thread in the
governor could be damaged.
f) Tighten the turning screw until tight.
g) Secure all connections with 0,81 mm (0.032 inch) stainless steel safety wire.
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-7
2017-10-06