Rotax 912 i Series Maintenance Manual page 87

SYSTEM DESCRIPTION
The vacuum pump should be considered an
accessory which is used to drive inertia instru-
ments installed in the aircraft.
There is the option of installing a vacuum pump.
To do this, the drive for the vacuum pump should
be retrofitted in the propeller gearbox and crank-
case.
Simultaneous use of the vacuum
NOTE:
pump and governor is not possible.
Gear ratio
The vacuum pump and the governor have the
same drive and therefore an equal gear ratio.
SAFETY INSTRUCTIONS
WARNUNG WARNING
Follow the general safety instructions during all
work on the engine and the assemblies around
it.
MAINTENANCE
As well as the maintenance and special checks,
see the relevant Maintenance Manual Line for
the respective 912 i Series engine type.
REMOVAL
VACUUM PUMP - REMOVAL
Preparation
- General visual inspection. See relevant Main-
tenance Manual Line for the 912 i Series
engine type.
- Carry out a functional test run to identify any
damage. See "Documentation of aircraft
manufacturer"
- The propeller gearbox must be removed so
that the governor drive can be removed. See
section 72-10-00.
Step
1 Loosen the 4 M6 hex. nuts with lock
washers.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Procedure
NOTICE
WARNUNG
Follow the vacuum pump manufacturer's
instructions for maintenance, inspection and
repair.
Fig. 1
1. Vacuum pump
3. M6 hex. nut
Step
2 Remove the vacuum pump including the
gasket and the attachment flange from
the crankcase.
Fig. 2
1. Vacuum pump
2. Gasket
2. 6.4 lock washer
Procedure
3. Attachment flange
4. M6 stud
37-10-00
Page 5
July 01/2012