Kubota M7131, Operator'S Manual

Page: 255 / 298

223 PERIODIC SERVICE
EVERY 400 HOURS
B
Checking Fan Belt Tension
To avoid personal injury or death:
A
Be sure to stop the engine before checking belt
tension.
The belt is of self-tension type and needs no
readjustment. Check the belt tension in the following
procedure. If the deflection is out of spec or the belt itself
is found damaged, replace it with new one.
1. Stop the engine and remove the key.
2. Press on the spot indicated in the figure below to
measure the deflection.
C Replacing the belt
1. Detach the air conditioner drive belt. (See "Checking
Air Conditioner Drive Belt" in "EVERY 500 HOURS" in
"PERIODIC SERVICE" section.)
2. Loosen the lock nut first and then fully loosen the
tension bolt.
3. Lift the tension pulley and remove the belt.
4. Fit the new belt instead as shown below.
5. Tighten the tension bolt until the proper belt tension is
obtained. Finally tighten up the lock nut.
Proper belt
tension
A deflection of between 9 to 11 mm
when the belt is pressed (98 N [10 kgf])
in the middle of the span.
(New belt: 7 to 9 mm)
(1) Fan belt (A) Check the belt tension
(1) Tension bolt
(2) Lock nut
(3) Self-tension pulley
(4) Self-tension spring
(1) Belt
(2) Tension spring end
(3) Tension bolt
(4) Lock nut
(5) Self-tension pulley
Tension bolt length (L) 40 mm (1.6 in.) (Reference)
Tightening torque of
lock nut
60 to 80 N-m
(6.12 to 8.16 kgf-m)
(44.3 to 59.0 ft-lbs.)