OPERATION AND INSTALLATION MANUAL
EN-1320
Figure 12-8 Connection of LUN7880 and LUN7840
(22) Connect rod from RPM control system to the lever "Rn" (figure 12-3) and secure.
(23) 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 58) - figure12-3 - and secure.
(24) Connect plug to the beta switch and secure.
(25) Adjust the governor according to procedure in this section.
B. Propeller Governor LUN7815.03
(1) Inspect the governor for damage. Shallow scratches in the governor housing and tool marks around
the mounting bolt areas are only acceptable provided that the governor function is not affected.
(2) Verify installation of spring on the lever "Rn" (figure 12-9).
(3) Verify locking devices of appropriate elements (figures 12-9, 12-10, 12-11).
(4) Verify seals and securing (figures 12-9, 12-10).
CAUTION:
BE CAREFUL AT SECURING ELEMENT 32 (FIGURES 12-10 AND 12-11, LOCKING WIRE AND
COTTER PIN). LEFT THREAD IS MARKED WITH "L". THE STOP – FIGURE 12-10 – MUST HAVE THE
SAFETY WIRE ACROSS THE HEXAGON HEAD OF THE BOLT. STOP MUST NOT BE RELEASED
AND RE-ADJUSTED, IT IS ADJUSTED BY GOVERNOR MANUFACTURER.
NOTE: Parts 15, 16, 29, 32, 37, 58 and 65 are adjustable.
(5) With "Bc" lever (figure 12-9) in basic position (guideline on the lever with cam aligns with minimum flight
pitch guideline on the governor scale and the control lever pin touches the stop 58), verify "Rn" lever
travel between stops 15 and 16.
(6) With lever "Rn" at maximum RPM stop 15 , verify lever "Bc" travel from basic position up to reverse,
when the guideline on the lever with cam is against reverse range on the governor scale. Then move
the lever "Bc" further to safety stop.
CAUTION: Lever "Bc" travel should be free.
(7) Verify the carbon block assembly (figure 12-6) for damage and completeness.
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-8
2017-10-06