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lower pivot point of the mounting bracket.
Remove the spacer installed between the
bracket and the engine.
(7) Remove the generator/alternator mounting
bracket from the aircraft.
B. Install the Generator/Alternator Mounting Bracket
Refer to Figure 3.
Detail Steps/Work Items Key Items
(1) Put the generator/alternator mounting
bracket in place on the aircraft engine.
Make sure that everything aligns correctly
with the through-bolts and the spacers.
(2) At the lower pivot point of the mounting
bracket, install the spacer between the
bracket and the engine.
Install the nut and plain washer at the lower
pivot point.
Lubricate the through-bolt with clean
50-weight oil.
Do not torque the nut at this time. The
mounting bracket will have to be adjusted.
Electrical Power
DA20-C1 AMM
Page 206
30 Oct 2008 24-30-00 Doc # DA201-C1
Rev. 14
Detail Steps/Work Items Key Items
(3) At the upper pivot point of the mounting
bracket, install the spacer between the
bracket and the engine.
Install the nut and plain washer at the upper
pivot point.
Lubricate the through-bolt with clean
50-weight oil.
Do not torque the nut at this time. The
mounting bracket will have to be adjusted.
(4) At the top forward side of the mounting
bracket, do a visual check of the spacer and
washer between the bracket and the engine.
Install the bolt, the plain washer and lock
washer at the top forward side of the
mounting bracket, going into the spacer.
The washer used may be the thin washer
(AN960-416L) or the plain washer (AN960-
416). The clearance required will assist in
the decision of which washer to use.
Torque the bolt on the engine side to 11.3-
14.0 Nm (100 – 125 in lbs).
Apply Loctite 222 to the threads of the bolt.
Use a new lock washer.
(5) Put the generator loosely in place on the
mounting bracket for a trial fit.
Make sure that generator pulley and the
prop extension pulley can be aligned.
(6) Remove the generator after the trial fit.
(7) Tighten the bolt at the forward side of the
mounting bracket going into the spacer.
Torque the bolt on the generator side to
10.2-10.4 Nm (90 – 110 in lbs).
(8) Tighten the nut at the lower pivot point of the
mounting bracket.
Torque the through-bolt nut on the bracket
side to 49.7-52.0 Nm (36.6 - 38.3 ft lbs).
(9) Tighten the nut at the upper pivot point of the
mounting bracket.
Torque the through-bolt nut on the bracket
side to 49.7-52.0 Nm (36.6 - 38.3 ft lbs).
(10) Put witness marks on the hardware that
follows:
- The nut at the upper pivot point
- The nut at the lower pivot point
- The bolt at the top forward side of the
mounting bracket going into the spacer.
(11) Install the tie wrap connector and tie wraps
to hold the generator electrical ground-wire
to the mounting bracket.
(12) Install the adjuster link to the top of the
mounting bracket. At the pivot point install
the bolt, the nut and the two washers.
Leave the bolt hand tightened for the
installation of the Generator/Alternator.
(13) Install the Generator/Alternator. Refer to Chapter 24-30.
Note: When the Generator/Alternator is installed it may be necessary to loosen the
attaching hardware and adjust the mounting bracket forward or aft to get the
correct alignment between the generator pulley and the prop extension pulley.
If the mounting bracket must be adjusted, make sure to torque and witness
mark the components in Item 5. B. (10) when completed.
DA20-C1 AMM
Electrical Power
Doc # DA201-C1
Rev. 14 24-30-00 Page 207
30 Oct 2008
Figure 4 – Sheet 1: Generator/Alternator Removal and Installation
Electrical Power
DA20-C1 AMM
Page 208
30 Oct 2008 24-30-00 Doc # DA201-C1
Rev. 14
Figure 4 – Sheet 2: Generator/Alternator Removal and Installation
DA20-C1 AMM
Electrical Power
Doc # DA201-C1
Rev. 14 24-30-00 Page 209
30 Oct 2008
6. Remove/Install the Generator/Alternator
A. Remove the Generator/Alternator
Refer to Figure 4 – Sheet 1.
Detail Steps/Work Items Key Items
(1) Disconnect the aircraft battery. Make sure
that you disconnect the negative lead first.
Refer to Chapter 24-31.
(2) Disconnect the electrical connections to the
generator at the generator.
(3) Loosen the top mounting bolt that holds the
adjuster link to the mounting bracket.
(4) Remove the adjusting bolt from the adjusting
bracket adjusting bolt, the plain washer and
lock washer from the generator and the
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钻石20系列AMM 1(77)
