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8) Make sure all the tools and materials are removed and the work area is clean and free from debris.
9) Remove the warning sign prohibiting main switch-breaker operation.
10) Install the engine cowlings - refer to 71-10-01.
11) Perform an operational test of the alternator.
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ALTERNATOR
ADJUSTMENT/TEST
1. ADJUSTMENT OF THE BELT TENSION (Figure 501)
A. Tools and consumable materials
- Torque wrench 0 to 180 Ibf.in (0 to 20 N.m)
- Socket, dia. 15/16"
- Red paint
B. Procedure
CAUTION : AN INCORRECT ADJUSTMENT OF THE ALTERNATOR BELT TENSION MAY GENERATE THE DAMAGE OF THE DRIVE SHAFT BEARING AND MAY CAUSE THE ALTERNATOR DAMAGE.
1) Make sure that the main switch-breaker is open.
2) Install the warning sign prohibiting main switch-breaker operation.
WARNING
DO NOT OPERATE
MAINTENANCE WORK IN PROGRESS
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE KEY IS REMOVED FROM MAGNETO SELECTOR AND THAT "MAIN SWITCH" IS OFF.
IF AIRCRAFT IS EQUIPPED WITH DISCONNECT PLUG ON FIREWALL, DISCONNECT "MAGNETO DISCONNECT" PLUG AND CONNECT IT TO "GROUND MAGNETO FOR SERVICING" PLUG.
WARNING : PRIOR TO ANY OPERATION, ENSURE THAT THE ENGINE, EXHAUST PIPE AND MANIFOLDS ARE COLD. IF NOT, TAKE NECESSARY PRECAUTIONS TO AVOID SEVERE BURNS.
3) Remove the engine cowlings - refer to 71-10-01.
4) Position a torque wrench fitted with a socket, dia. 15/16", on nut (3) securing alternator pulley.
5) Hold propeller firmly and turn torque wrench clockwise ; record the value when the pulley slides.
6) Adjustment is correct if the value lies within :
- 22 and 24 ft.lbs (29.8 and 32.5 N.m) for a new belt.
- 15 and 17 ft.lbs (20.3 and 23 N.m) for an in-service belt.
7) If adjustment is not correct, perform the following operations :
a) Loosen the nut securing pulley (1).
b) Tension belt (2) by pivoting pulley (1) downwards, and tighten the nut securing pulley (1).
c) Perform two or three propeller rotations to evenly distribute the stresses.
ABAC
Validity : S / N 1 - 9999 Post-MOD. 160 24-30 01 (CG) Page o cT50021
d) Repeat steps 4), 5) and 7) until you obtain the recommended value.
e) Mark the nut securing pulley (1) with a line of red paint.
8) Make sure all the tools and materials are removed and the work area is clean and free from debris.
9) Remove the warning sign prohibiting main switch-breaker operation.
10) Install the engine cowlings - refer to 71-10-01.
11) Perform an operational test of the alternator.
1 - Pulley
2 - Belt
3 - Nut
Alternator - Adjustment / Test
Figure 501
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