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3.2.6
CHECKING FAN BELT AND AIR CONDITIONING COMPRESSOR
BELT
INSPECTING AND MAINTAINING THE BELT
Be sure to stop the engine before inspection and maintenance of the engine.
Inspecting and maintaining the running engine may cause severe injury by being caught in the rotating parts, such
as the fan and the belt.
Replace the belt with a new one if cracking or breakage is found on the belt by the inspection, slip occurs
excessively, or the belt cannot be adjusted to within the adjustment range. Keep the belt away from oils. The
service life may be shortened if it slips by oil.
• When the belt is replaced by a new one, run engine at idle for 3 to 5 minutes and recheck and or adjust tension
as necessary.
• After running the engine for about 2 hours, a new belt obtains a complete initial elongation.
• When replacing a set of two belts, be sure to replace both two with new ones.
The engine of this machine is equipped with the alternator, the fan, and air conditioning compressor belts.
Check the belts for wear and damage, and also for tension, and adjust them properly in order to maintain the
maximum engine performance and the service life.
For adjustment procedures for each belt, see "ADJUSTING FAN BELT AND AIR CONDITIONING COMPRESSOR
BELT" in Chapter 4.
•
To check the belt tension, press on the center of the
belt with the compression gauge. If the deflection
falls within the range shown in the following table, it
is normal.
Belt
New Belt
Tension
mm (inch)
At Inspection
mm (inch)
Pushing Force
N (lbf)
Fan alternator
4.2 to 5(0.17 to 0.20)
6.6 to 7.4(0.26 to 0.29)
98(22)
Air conditioning
compressor belt
2(0.08)
2(0.08)
• 38 to 41 (8.5 to 9.2) *New Belt Tension
• 12 to 14 (2.7 to 3.1) *At Inspection
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