10) Propeller Gearbox Disassembly - Rotax 912 Series Maintenance Manual

fig. 142

14.4.10) Propeller gearbox disassembly

Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
The plug screws u and i normally remain closed. On position u a
pressure gauge for governor pressure check can be connected. The
maximum regulating pressure is between 22 and 25 bar (320 ÷ 360 p.s.i.).
The governor starts regulating at 3600 ÷ 3700 rpm.
At malfunction of propeller governing suspect the following as possible
cause:
— adjustment of governor actuation
— function of propeller governor
— insufficient oil pressure, oil pressure fluc-
tuations
— propeller pitch control.
18
9
8
10
00259
11
20
See fig. 144, 145 and 146.
Place gearbox under suitable fixture Q and put pressure on dog gear W
via yoke, part no. 876 885, until ring halves E come free and can be
removed.
CAUTION: Depress the dog gear only so far that free movement of
this gear is still warranted, as any further depression
might destroy the gear cover.
19
12
13
15
16
min.Steigung /
minimum pitch
90°
15°
5
fig. 143
00270
14
17
page 94
Initial issue, Jan. 01/2002