Isuzu Tilt Slide FYJ2000 Instruction Manual page 478

7-150
SERVICE AND MAINTENANCE
New belt
When reused
Air Conditioning Compressor Belt
Standard value
[amount of deflection]
11 - 14 mm (0.43 - 0.55 in)
15 - 17 mm (0.59 - 0.67 in)
If the air conditioning compressor belt
becomes loose, cooling performance
will be impaired. It is important to inspect
belt tension to ensure proper cab interior
cooling.
Checking the Compressor Belt
Check to see if the deflection of the belt
is within the standard value range when
the point mid-way between the pulleys
is pressed with a force of approximately
98 N (10.0 kgf/22 lb).
When inspecting by vibration frequency,
place and hold the sensor mike surface
parallel to the belt 10 mm (0.39 in) from
the center of the span between pulleys
(indicated by the arrow) and tap the belt
with a handle of screwdriver etc. to make
the belt vibrated and measure the value.
Measure the value 2 or 3 times and
calculate the average value. The average
value must be within the standard value
range indicated below. Otherwise, adjust
the tension.
Standard value
[vibration frequency]
104 - 126 Hz
Adjustments
1. Loosen the lock nut of the idler pulley.
2. Adjust the belt tension with the
adjusting bolt.
3. After adjustment, tighten the lock nut
securely.
Tightening torque
31 - 47 N·m (3.2 - 4.8 kgf·m/23 - 35 lb·ft)
V
89 - 103 Hz