Effectivity 912/914 Series
Edition 1 / Rev. 2
74-00-00
page 59
July 01/2008
d04353
BRP-Rotax
Maintenance Manual
3.23.4) Checking of the external generator
See Fig. 74-39
3.23.4.1) Check of the power output of the generator
At an alternator rpm of 5000 rpm the output has to be at
least 40 amps (between Terminal B (2) and ground).
◆ NOTE 5000 rpm of the alternator is equivalent to
1680 rpm of the propeller shaft or the propeller
respectively.
3.23.4.2) Mechanical check
■ CAUTION : Disconnect the cable from the negative
battery terminal.
Remove hex-nut (1) from terminal B (2), also remove the
three hex-screws (3). Remove the rear bearing plate(4).
After loosening the crosshead screw (5) and removing the
cover (3) the brush carrier and the rubber can be taken off.
Messure the length of the brush carrier (6) (AL02) and
record the result in the appendix. Check the shaft for
grooves. It should not be possible to feel a ridge (9). Turn
the shaft by hand. The bearings must be easy to move and
must not show any resistance.
Fig. 74-39
1
2
3
3
3
4
5
6
7
5
08482
08483
08481
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