OPERATION AND INSTALLATION MANUAL
EN-1320
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.
(19) Connect rod from RPM control system to the lever "Rn" (figure 12-12) and secure.
(20) Connect the control rod from engine to the lever "Bc" in its basic position (guideline on the lever with
cam is aligns with minimum flight pitch guideline on the governor scale and the control lever pin
touching the stop) - figure 12-12 - and secure.
(21) Connect plug to the beta switch and secure.
(22) Adjust the governor according to procedure in this section.
12.5 GOVERNOR REMOVAL FROM ENGINE
(1) Disconnect control rod from governor lever "Bc".
(2) Disconnect control rod from governor lever "Rn".
CAUTION:
DISCONNECT BOTH RODS ACCORDING TO INSTRUCTIONS IN ENGINE AND AIRCRAFT MANUAL.
(3) If feathering valve LUN7880 is enclosed, disconnect tube from the governor to the valve.
(4) If feathering pump LUN7840 is enclosed, disconnect the tube from the governor to the pump.
(5) Remove cotter pin, washer and pin, remove the carbon block assembly from lever "Zv" and from the
beta-ring.
(6) Disconnect connector of BETA-range signaling circuit.
(7) Loose screws mounting governor to the engine and remove with washers.
(8) Remove the governor.
CAUTION: AVOID DAMAGE OF SLIP RINGS AND THE PROPELLER BULKHEAD.
(9) LUN7815.( ) only
If the drive shaft is in gear box drive, remove it and place into governor shaft.
NOTE: The drive shaft must have marked governor S/N.
(10) Cover the governor flange using packing and appropriate cap.
(11) Reinstall the carbon block assembly onto the lever "Zv".
(12) Cover governor fittings with appropriate caps.
(13) Preserve and store the governor in accordance with Storage and Preservation section in the end
of this chapter.
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-14
2017-10-06
