
Effectivity: 912 Series
MAINTENANCE MANUAL II
AIRCRAFT ENGINES
d01381
page3
Initial issue, Jan. 01/2002
13) Maintenance of the Systems..........................................................................35
13.1) Fuel system......................................................................................................35
13.1.1) Removalof carburetors and carburetor flange............................................. 35
13.1.2) BINGconstant depression carburetor: Check andmaintenance.................. 36
13.1.2.1) Leakage test of float needle valve ............................................. 36
13.1.2.2) Diaphragm ................................................................................. 37
13.1.2.3) Jetneedle .................................................................................. 37
13.1.2.4) Jets............................................................................................ 38
13.1.2.5) Floatchamber............................................................................ 38
13.1.2.6) Floatsuspension........................................................................ 39
13.1.2.7) Check of float needle valve........................................................ 39
13.1.2.8) Startingcarburetor(choke) ........................................................ 40
13.1.3) Check of the fuel system ............................................................................ 41
13.1.3.1) Generalnotes onfuels ............................................................... 41
13.1.3.2) Fuelpressure ............................................................................. 42
13.1.4) Carburetorflange......................................................................................... 44
13.1.5) Fuel pump ................................................................................................... 45
13.1.6) Fuel tubes ................................................................................................... 46
13.1.7) Carburetor flange,carburetor ....................................................................... 47
13.2) Lubricating system...........................................................................................48
13.2.1) Oilpump removal ........................................................................................ 48
13.2.2) Oil pump checking ...................................................................................... 48
13.2.3) Oilpump reassembly .................................................................................. 49
13.2.4) Magneticplug.............................................................................................. 50
13.2.5) Drainscrew ................................................................................................. 50
13.3) Cooling system ................................................................................................51
13.3.1) Waterpumpremoval ................................................................................... 51
13.3.2) Waterpumphousing disassemblyandinspection ....................................... 51
13.3.3) Magnetohub ............................................................................................... 52
13.3.4) Ignition housing disassembly and inspect................................................... 52
13.3.5) Water pump shaft disassembly ................................................................... 55
13.3.6) Rotary seal disassembly ............................................................................. 55
13.3.7) Rotaryseal reassembly............................................................................... 56
13.3.8) Crosssection of water pump........................................................................ 57
13.3.9) Ignitionhousing reassembly........................................................................ 58
13.3.10) water pumphousingreassembly ................................................................. 59
13.3.11) Hose clamps ............................................................................................... 60
13.3.12) Coolingairbaffle ......................................................................................... 60
13.4) Ignition system.................................................................................................61
13.4.1) Checking of ignition unit, trouble shooting................................................... 61
13.4.2) Spark plugs, ignition cables, spark plug connectors, cables ....................... 61
13.4.3) Electronic module, trigger set...................................................................... 62
13.4.4) Chargingcoil ............................................................................................... 63
13.4.5) Doubleignition coil ...................................................................................... 63
13.4.6) Generatorcoil.............................................................................................. 64
13.4.7) Resistance values of the ignition unit.......................................................... 64
13.4.8) Wiringdiagrams .......................................................................................... 65
13.4.8.1) Wiringdiagram for ignitionsystem("Single Plug") ...................... 65
13.4.8.2) Wiringdiagram for ignitionsystem ("Central plug") .................... 66