Austro Engine E4 Series - Acceptance Criteria for Alternator Bench Tests; Inspection of Alternator E4 A-91-000-000 and the Carbon Brushes; Special Tools; Remove the Brush Holder Assembly

E4 Series
Maintenance Manual
Electrical Power
Page 204
E4.08.04
Rev.29
24-30-00
01-Jul-2020
3. Acceptance criteria for alternator bench tests
For alternator tests on an alternator test bench, the following acceptance criteria apply:
Alternator [RPM]
Voltage [V]
Load Current [A]
Hold time of load
Currents [s]
9700 (+/-50)
28 (+/- 0.5)
>0<5
30
5200 (+/-50)
27.7 (+/- 0.5)
>35<40
30
9700 (+/-50)
27.7 (+/- 0.5)
>65<72
30
4. Inspection of Alternator E4A-91-000-000 and the Carbon Brushes
This section lists the steps to disassemble the alternator and its components (e.g. brush holder) and
to measure the length of the carbon brushes.
This section contains also the criteria for replacing the Brush Holder assembly E4A-91-300-000.
A. Special Tools
Number
Description
Dimensions
1
Screw Driver
Slotted Screw Driver (~2mm)
2
Thin Metal
Sheet
~0.3mm x ~8mm
3
Sliding Caliper
---
4
Multimeter
---
5
Wrench
(hexagonal)
Size 8
6
Wrench
(hexagonal)
Size 7
B. Remove the Brush Holder Assembly
Detail Steps/Work Items
Key Items/References
(1)
Remove the two screws G and G2.
Refer to Fig. 24 - 6.
Use wrench size 8.
(2)
Remove the black plastic cover on the
backside of the alternator.
(3)
Remove R1, R2 and R3.
Refer to Fig. 24 - 7.
Use wrench size 7.
(4)
Carefully remove the brush holder assembly.