page 74
May 01/2009
Effectivity: 912 Series
Edition 1 / Rev. 1
d04636
INSTALLATION MANUAL
BRP-Powertrain
Oil return
■
CAUTION:
The engine design is for a conventional, non-aerobatic,
fixed wing tractor or pusher type configuration with the
oil return port in the optimum position. With this
consideration the engine is properly lubricated in all
flight profiles. Aircraft that are not conventional (e.g.
airship, gyrocopters, dive brake equipped aircraft etc.)
that require engine load in steeply incline and decline
angles (see also sec. 8.1, point 12) may require special
lubrication considerations.
According to propeller configuration and oil system layout choose the
appropriate connection for the oil return line.
Position
1
for tractor or position
2
for pusher configuration and connector-
options (1), (2) and (5). See Fig. 47.
Option 1: - connection with slip-on connection (1):
hose nipple (3) .......................... 10 DIN 7642
outside dia. ............................... 13,5 mm (.53 in)
slip-on length ............................ max. 24 mm (max. .94 in)
Tightening torque of banjo bolt (4)
M16x1,5x28: ...... 30 Nm (22 ft.lb)
Option 2 and 3:-connection with screw connection (2) or (5):
-
connection with screw connection (2):
thread ....................................... 3/4-16 UNF (AN-8)
Tightening torque of oil return line: .................... 25 Nm (18.5 ft.lb)
Tightening torque of screw connection (2) M16x1,5: . 25 Nm (18.5 ft.lb)
-
connection with screw connection (5):
thread ....................................... 3/4-16 UNF (AN-8)
Tightening torque of oil return line: .................... 25 Nm (18.5 ft.lb)
Tightening torque of banjo bolt (4)
M16x1,5x28: ........ 30 Nm (22 ft.lb)
Fig. 47
08634
3
4
1
2
5
4
