EN-1320
OPERATION AND INSTALLATION MANUAL
12.7 TESTING
A. Propeller Governor LUN7815.(-)
(1) Basic adjustment check
(only for governor LUN7815.02)
a) Disconnect the rod "Sv" 65 from the gate "Sv" - loose and remove nut and remove the pin from the rod
fork. Then move the rod out of the gate "Sv" (figure 12-17).
b) Fix the loosen rod "Sv" 65 using lock wire to the governor such way, that its movement will not be
restricted.
c) Propeller condition lever must be placed in maximum RPM position and then the lever "Rn" must be at
maximum RPM stop 15.
d) Place the propeller condition lever into the feather position and fix, the lever "Rn" must be at its
feather stop 16. Place the propeller condition lever back to the maximum RPM.
e) Place the engine condition lever to the idle stop, guideline on the cam lever must align with minimum
flight pitch guideline on the governor scale (figure 12-27A). If not, adjust according to engine
operational manual. The pin of outer coaxial valve must touch the stop 58.
CAUTION:
IF THE ENGINE CONDITION LEVER IS PLACED OVER IDLE STOP INTO BETA RANGE, DON’T
MOVE THE PROPELLER CONDITION LEVER INTO FEATHER POSITION AND VICE VERSA.
f) Place the engine condition lever into maximum reverse position, guideline on the cam lever must be
aligned with BETA range on the governor scale (figure 12-27B). If not, adjust according to the engine
operational manual.
g) Connect the rod "Sv" 65, screw the nut and secure with cotter pin.
WARNING: Use new cotter pin each installation.
h) Check adjustment of the coupled connection, move the engine condition lever to touch rod "Sv"
65 pin in the gate "Sv", the guideline on the cam lever should align with "Sv" guideline on the
governor scale (figure 12-27C). Max. difference is ±0,5 mm (±0.02 inch).
i) Check clearance between tracking lever pin and stop acc. to procedure in section 12.6.
j) Check clearance between blocking and the pilot valve acc. to procedure in section 12.6.
k) Verify clearance between beta-ring and carbon block assembly according to procedure in section 12.6.
Figure 12-27 Governor LUN7815.02 - Basic adjustment check
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-25
2017-10-06
