I'm having trouble figuring out what the correct torque values are for the following engine fuel line fittings:
1. VA-216 Fuel return line brass hose fitting to the -4D bulkhead union.
2. VA-216 Fuel pressure sensor line steel hose fitting to steel elbow F4 DTX-S.
3. F4 DTX-S elbow to the brass thread on the fuel pressure sensor.
3. Gascolator to fuel pump line at the gascolator -6D fitting (Rotax Installation Manual says 135 lbin for this one, but seems a bit low for a -6D??).
The Standard Aircraft Handbook Fig 7-13 gives a range of values for different types of fittings, but which ones to use for the above connections? To add to the confusion, the Aeroquip table from Vans gives different values for aluminium fittings than those in the Handbook. I also can't find anything in the various Rotax manuals for these hoses other than the one mentioned above.
What have others done?
1. VA-216 Fuel return line brass hose fitting to the -4D bulkhead union.
2. VA-216 Fuel pressure sensor line steel hose fitting to steel elbow F4 DTX-S.
3. F4 DTX-S elbow to the brass thread on the fuel pressure sensor.
3. Gascolator to fuel pump line at the gascolator -6D fitting (Rotax Installation Manual says 135 lbin for this one, but seems a bit low for a -6D??).
The Standard Aircraft Handbook Fig 7-13 gives a range of values for different types of fittings, but which ones to use for the above connections? To add to the confusion, the Aeroquip table from Vans gives different values for aluminium fittings than those in the Handbook. I also can't find anything in the various Rotax manuals for these hoses other than the one mentioned above.
What have others done?