Yanmar SA424 - Alternator;Fan Belt Service

14. PERIODIC SERVICE
14-17
SA221/324/424 Operation Manual
■ Service the Alternator/Fan Belt
1. Check the Alternator/Fan Belt Tension
1. Park the tractor safely and securely.
• For details, see "7. Safe Practices for Parking the
Tractor" on page 1-7.
2. Shut off the engine.
3. Chock all the tires safely and securely.
4. Allow the engine to cool down for several
minutes.
5. Raise the hood.
(A) Alternator/fan belt
6. Using the thumb, gently apply pressure to the
midpoint of the alternator/fan belt between the
pulleys.
7. Check whether the alternator/fan belt deflects
inward by approximately 0.4 to 0.6 in. (10 to
15 mm).
8. If the deflection is not as specified, adjust the
tension of the alternator/fan belt.
(A) 0.4 to 0.6 in. (10 to 15 mm)
(B) Adjusting bolt
(C) Mounting bolt
(D) Fixing bolt
2. Adjust the Alternator/Fan Belt
Tension
1. Loosen the adjusting bolt.
2. Loosen the mounting bolt.
3. Loosen the fixing bolt.
4. Exert an outward pressure on the alternator
housing to attain the correct tension.
5. Tighten the adjusting bolt, and the mounting bolt,
in that order.
6. Check the alternator/fan belt tension.
7. Tighten the fixing bolt.
8. Lower the hood.
9. Confirm that the hood latch locked securely.
Avoid injury!
●Fingers or loose clothing can get entangled
with rotating parts.
●Before performing maintenance, shut off the
engine.
● Allow all the moving parts to completely stop.
! WARNING
(A)
NOTE
●The above illustration shows 221.
(B)
(D)
(C)
(A)
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