EN-1320
OPERATION AND INSTALLATION MANUAL
12.6 BASIC ADJUSTMENT AFTER INSTALLATION ON ENGINE
CAUTION:
ALL REMOVAL, INSTALLATION AND REPAIR WORKS PUBLISHED IN THIS MANUAL MUST BE
PERFORMED BY PERSONNEL WITH APPROPRIATE QUALIFICATION.
A. Propeller Governor LUN 7815.(-)
(1) Governor adjustment with element 32.
(for governors LUN7815.02, LUN7815.03)
NOTE: Perform this adjustment with propeller installed.
a) Check whether the propeller is in feather position and the beta-ring is not protruded and it seats at
propeller hub.
b) If the propeller is not in feather position, move it to feather position by turning the blades to seat the
beta-ring on the propeller hub.
WARNING: CATCH THE BLADES AT ITS SHANK, NEVER AT BLADE TIP.
c) Remove lock wire at both ends of 32 securing both nuts to the rod and loose the nuts.
NOTE: Left thread is marked with letter "L".
d) Pull the propeller, using blade part as close as possible to blade shank, in flight direction to eliminate
axial play and keep this arrangement during adjustment.
e) Insert gage 1531-042 (engine toolkit) between stop and stop pin (figure 12-15). When the clearance
between the stop and the stop pin is smaller, shorten rod 32 by turning.
CAUTION:
SHORTEN THE ROD ONLY INSTALLED ON THE GOVERNOR! DO NOT REMOVE THE ROD AT ANY
END!
Figure 12-15 Adjustment with element 32 Figure 12-16 Beta-ring clearance
f) Moving with the tracking lever, clamp the gage 1531-042 and adjust length of element 32 such way,
that carbon block assembly on the lever "Zv" is not pressed to the beta-ring on one side (when the
beta-ring is retracted and eliminated clearances). The carbon block assembly must be free and axial
clearance between the beta-ring and carbon blocks is equally divided to both sides.
CAUTION:
TOTAL CLEARANCE BETWEEN BETA-RING AND CARBON BLOCKS, FIGURE 12-16, IS 0,15 TO
0,18 mm (0.006-0.007 inch), MUST NOT BE LESS. MAXIMUM OPERATIONAL ACCEPTABLE
CLEARANCE IS 0,4 mm (0.016 inch).
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-15
2017-10-06
