Rotax 912 Series Service Manual

BRP-Rotax
Maintenance Manual
72-00-00
page 2
May 01/2007
Effectivity 912/914 Series
Edition 1 / Rev. 0
d02622
3.9) Propeller gearbox ..........................................................................72-00-00 / 22
3.9.1) Removal of roller bearing for - Series 2 ................................72-00-00 / 24
3.9.2) Removal of roller bearing for - Series 3 ................................72-00-00 / 26
3.9.3) Removal of roller bearing for - Series 4 ................................72-00-00 / 27
3.9.4) Propeller gearbox disassembly ............................................72-00-00 / 28
3.9.5) Propeller shaft removal........................................................72-00-00 / 30
3.9.6) Vacuum pump drive removal ...............................................72-00-00 / 32
3.9.7) Propeller governor drive removal..........................................72-00-00 / 33
3.9.8) Drive of the propeller governor installation ..........................72-00-00 / 35
3.9.9) Vacuum pump drive installation ...........................................72-00-00 / 38
3.9.10) Gearbox components inspection .........................................72-00-00 / 39
3.9.11) Toothed shaft profiles inspection .........................................72-00-00 / 43
3.9.12) Gear set (gear wheels) inspection.......................................72-00-00 / 44
3.9.13) Propeller gearbox reassembly .............................................72-00-00 / 49
3.9.14) Disc spring pre-tension adjustment .....................................72-00-00 / 51
3.9.15) Propeller gearbox — installation ...........................................72-00-00 / 53
3.10) Cylinder head — removal ..............................................................72-00-00 / 55
3.11) Cylinder head - disassembly .........................................................72-00-00 / 57
3.11.1) Cylinder head and studs .......................................................72-00-00 / 59
3.11.2) Reworking of the sealing surface to the exhaust manifold ....72-00-00 / 61
3.11.3) Valve guides .........................................................................72-00-00 / 62
3.11.4) Valve seats ...........................................................................72-00-00 / 63
3.11.5) Valves ...................................................................................72-00-00 / 64
3.11.6) Valve springs ........................................................................72-00-00 / 67
3.11.7) Washers................................................................................72-00-00 / 69
3.11.8) Rocker arm and rocker arm shaft ........................................ 72-00-00 / 70
3.11.8.1) Rocker arm with plastic bushing............................ 72-00-00 / 71
3.11.8.2) Rocker arm with pressed sinter bushing ............... 72-00-00 / 72
3.11.8.3) Rocker arm shaft................................................... 72-00-00 / 72
3.12) Cylinder head reassembly ............................................................ 72-00-00 / 73
3.13) Cylinder and piston - removal ....................................................... 72-00-00 / 75
3.13.1) Checking pistons ..................................................................72-00-00 / 77
3.13.2) Checking the piston ring .......................................................72-00-00 / 79
3.13.3) Piston pin ..............................................................................72-00-00 / 80
3.13.4) Cylinders inspection ............................................................. 72-00-00 / 81
3.14) Hydraulic valve tappets .................................................................72-00-00 / 83
3.15) Pushrods ....................................................................................... 72-00-00 / 85

Rotax 912 Series Specifications

General

Redline	5800 rpm
TBO	2000 hours
Displacement	1211 cc
Bore	79.5 mm
Stroke	61 mm
Power Output	80 hp (59.6 kW)
Compression Ratio	9.0:1
Fuel Type	Avgas 100LL
Ignition System	Dual electronic ignition
Fuel System	Fuel Injected
Oil System	Dry sump
Engine Type	4-cylinder, horizontally opposed, 4-stroke