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SECTION 3 - LUBRICATION AND MAINTENANCE
3-18
EVERY 10 HOURS OR DAILY
OPERATION 6
Check the Alternator Drive Belt Tension
2290, 2335, 2375 QSM11Engine
The QSM11 engines use a spring-loaded idler,
(N14 illustrated) to keep a constant tension on
the alternator belt. This is a shared drive using
the fan belt. See operation 3, for details on
checking tension.
2360, 2425 (N14) Engine
Use a belt tension gauge to check and/or adjust
belts, or use the firm thumb pressure and
deflection method. With firm thumb pressure, a
properly adjusted belt should deflect 0.8 mm
(1/32″) for each 25 mm (1”) of span between
pulleys. If the belt requires adjustment, use the
following procedure:
Loosen the pivot bolt, 1, which secures the
alternator to the engine. Loosen the adjuster
clamp bolt, 2, and locknut, 3. Adjust the belt
tension by tightening the adjuster bolt, 4. Torque
the adjuster clamp bolt to 79 N⋅m (58 ft. lbs.).
(Recheck the belt tension.) Torque the locknut to
79 N⋅m (58 ft. lbs.) and pivot bolt to 61 N⋅m (45 ft.
lbs.).
IMPORTANT: Do not adjust belt tension to full
value with the adjusting screw. Belt tension can
increase when the adjuster clamp bolt is
tightened and, therefore, reduce belt and
bearing life.
NOTE: 2360, and 2425 tractor models use the
same alternator adjustment bracket.
If the belt requires replacement, the adjustment
should be backed off all the way, and the belt
slipped up around thepulleys. Install the new belt
by reversing the procedure and tension it as
detailed above. Never pry a belt off a pulley as
damage to the pulley may result.
NOTE: The alternator drive belt is supplied by
Buhler Versatile. Contact your Buhler
Versatile dealer if a new belt is required.
NOTE: Refer to your Cummins Engine
Manual for more information regarding belt
replacement, wear guidelines, and pulley
alignment.
Figure 3-18
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3
2
4