Yanmar D10 Safety, Operation, Maintenance & Parts Manual page 22

Maintenance
2
Alternator Belt
See Figure 2-3.
Belt Tension
Adjustment Bolt
with Nut
5. Turn the belt tension adjustment nut clockwise to tighten the belt, counterclockwise to
loosen the belt. Adjust the bolt until the proper belt tension is achieved.
6. After the alternator belt has been tensioned, tighten the adjustment bolt jam nut. Tighten
the upper and lower pivots and replace the belt covers.
2-8
Lower Alternator
Mounting Bolt
CAUTION! Do not overtighten the alternator belt. Damage
to the alternator will occur.
doc041409
FIG. 2-3
Maintenance