Date: 11-15-19
Revision: 2
5.7.20-8
VASHON AIRCRAFT RANGER R7 MAINTENANCE MANUAL
(b)
Disconnect the wires.
(c)
Remove the mounting bolts.
(3)
INSPECTION
NOTE
Unless repairing broken connectors/wires in the field, repairs should be conducted
by personnel outlined in Section 5.4.
(a)
Inspect drive gear assembly and replace bushings if needed. Torque shaft nut to 180
in-lb. min., do not exceed 220 in-lb. install cotter pin if needed.
(b)
Turn on FIELD/ENABLE switch with engine running at 1200 RPM. Verify the voltage to
be 14.2+- 0.3 volts from the alternator (with EFIS or voltmeter). Turn on Landing
Lights and ensure that the voltage stays at 14.2+/-0.3 V.
(c)
After 5 years of 500 hours, check the field brush for proper length. If the field brush
extends less than 0.250” from the edge of the brush holder, than the bushes are
excessively worn and should be replaced.
(4)
INSTALLATION
(a)
Install alternator as per manufacturer’s instructions.
