Vacuum Pump Disassembly; Vacuum Pump Drive Disassembly - Rotax 912 Series Maintenance Manual

14.4.4)
4
3
14.4.5)
6
7
8
1
fig. 135
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II

Vacuum pump disassembly

See fig. 134.
1
00251
fig. 134

Vacuum pump drive disassembly

See fig 135.
Drive of vacuum pump via drive gear Q fitted on propeller shaft. Reduction
ratio 22 : 29.
Check ball bearing W and needle sleeve E. Check teething of drive gear
Q, vacuum pump gear R, drive sleeve T and drive shaft of vacuum pump.
If the ball bearing or needle sleeve must be renewed,
4
remove the vacuum pump as follows:
2
Lock drive sleeve T with holder, part no. 242 660,
00252
At this procedure the needle sleeve E, oil seal O and
NOTE:
ball bearing W are damaged and must be renewed.
After the removal of the 4 nuts M6 Q along with
washers the vacuum pump W, gasket E and
attachment flange R can be taken off.
2
remove Allen screw Y M8x14 and withdraw
vacuum pump gear R with drive sleeve T.
Remove
3
screw U M5x12 with
9
washer I for ball bearing
5
fixation.
Remove oil seal O and
press out needle sleeve
and ball bearing with suit-
able step punch towards
propeller flange. Clean
bearing seat and check.
countersunk
page 90
Initial issue, Jan. 01/2002