Rotax 912 Series Maintenance Manual page 121

Designation
Hardness of cylinder head (fill in if requested)
cylinder head no. 1 .................... min. 85 HB 2,5/62,5/30
cylinder head no. 2 .................... min. 85 HB 2,5/62,5/30
cylinder head no. 3 .................... min. 85 HB 2,5/62,5/30
cylinder head no. 4 .................... min. 85 HB 2,5/62,5/30
Propeller gearbox
wear depth on dogs .................................
length of bearing sleeve, dog gear ....... 29,6 ÷29,8
axial clearance of propeller shaft ........... 0,02 ÷ 0,07
propeller shaft ø 35 mm (1,378 in) } ... 35,009÷35,02
propeller shaft ø 31,5 mm (1,24 in) q . 31,481÷31,47
prop. flange, axial out-of-true ø 122 (4,8 in) w
propeller shaft, internal dia. e ............. 11,00 ÷11,02
oil inlet flange, journal dia. e ............... 10,935÷10,96
radial clearance
dog clearance r .................................... 1,00 ÷ 1,20
thickness of thrust washer t ................ 1,075÷ 1,325 (0,042 ÷ 0,052) ........ 1,00 (0,039) ..........................
disk spring, free length y ...................... 5,20 ÷ 5,40
gear backlash i .................................... 0,07 ÷ 0,15
Crankshaft
out-of-round, magneto side Q ................ 0,00 ÷ 0,03
out-of-round, p.t.o. side Q ..................... 0,00 ÷ 0,03
bearing,magneto side R ...................... 31,99 ÷32,00
ignition housing E
radial clearance, magneto side .............. 0,02 ÷ 0,04
bearing, p.t.o. side u .......................... 27,99 ÷28,00
gearbox cover { ................................. 28,02 ÷28,03
radial clearance, p.t.o. side .................... 0,02 ÷ 0,04
Sprag clutch
axial clearance 0 .................................. 0,30 ÷ 0,50
Water pump
impeller clearance T ............................. 0,40 ÷ 0,50
Oil pump
pump plunger, axial clearance 2
Ignition unit
spark plug, electrode gap Y .................. 0,7 ÷ 0,8
gap 7 for "old type" trigger coil ............... 0,4 ÷ 0,5
gap 7 for trigger coil with clamps ........... 0,3 ÷ 0,4
trigger coil, axial offsetting 8 ................ 0,0 ÷ 0,2
Electric starter
armature, axial clearance 9 .................. 0,1 ÷ 0,2
Push rod
out of round G ....................................... 0,0 ÷ 0,1
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
new
mm (in.)
0,00 0,00 ................. 0,20 (0,008) ..........................
(1,165 ÷ 1,173) ...... 29,00 (1,142) ..........................
(0,0008 ÷ 0,0028) ...... 0,30 (0,012) ..........................
(1,378 ÷ 1,379) ...... 35,003(1,378) ..........................
(1,240 ÷ 1,239) ...... 31,460(1,239) ..........................
0,00 ÷ 0,05 (0,00 ÷ 0,002) ........ 0,06 (0,002) ..........................
(0,433 ÷ 0,434) ...... 11,05 (0,435) ..........................
(0,430 ÷ 0,431) ...... 10,88 (0,428) ..........................
0,04 ÷ 0,085 (0,0016 ÷ 0,003) ........ 0,16 (0,006) ..........................
(0,039 ÷ 0,047) ........ 0,50 (0,019) ..........................
(0,205 ÷ 0,213) ........ 4,50 (0,177) ..........................
(0,003 ÷ 0,006) ........ 0,20 (0,008) ..........................
(0,00 ÷ 0,0012) ...... 0,06 (0,002) ..........................
(0,00 ÷ 0,0012) ...... 0,06 (0,002) ..........................
(1,259 ÷ 1,260) ...... 31,95 (1,258) ..........................
32,02 ÷32,03 (1,261 ÷ 1,261) ...... 32,10 (1,264) ..........................
(0,0008 ÷ 0,0016) ...... 0,12 (0,005) ..........................
(1,102 ÷ 1,102) ...... 27,95 (1,100) ..........................
(1,103 ÷ 1,104) ...... 28,10 (1,106) ..........................
(0,0008 ÷ 0,0016) ...... 0,12 (0,005) ..........................
(0,012 ÷ 0,019) ........ 0,7
(0,016 ÷ 0,019) ........ 0,7
0,00 ÷ 0,07 (0,00 ÷ 0,028) ........ 0,2
(0,028 ÷ 0,031) ........ 0,9
(0,016 ÷ 0,020) ........ 0,5
(0,012 ÷ 0,016) ........ 0,4
(0,000 ÷ 0,008) ........ 0,3
(0,004 ÷ 0,008) ........ 0,3
(0,0 ÷ 0,004) ........ 0,2
wear limit
mm (in.)
.................... .....................................
.................... .....................................
.................... .....................................
.................... .....................................
(0,028) ..........................
(0,028) ..........................
(0,008) ..........................
(0,035) ..........................
(0,020) ..........................
(0,016) ..........................
(0,012) ..........................
(0,012) ..........................
(0,008) ..........................
Initial issue, Jan. 01/2002
actual dim.
int. / exh.
EV / AV
page 121