Kubota WSM 05-E4B Series - Checking Fan Belt Damage and Wear

1. Check
the tension of fan belt at the position (A)
between
the
fan drive pulley and alternator pulley
with sonic belt tension meter.
NOTE
• If the measurement
is out of the service
specifications, loosen the alternator
mounting screws and adjust its position.
Sonic belt tension meter setting value
Mass
(Mass per 1 rib 1 m of belt)
75 g/rib/m
Width
(Number of ribs)
1
Span L
Measure at location (A) in the
figure with (L) as the distance
between the fan drive pulley
and alternator pulley.
Belt tension
Service specifi-
cation
200 to 300 N
20.4 to 30.5 kgf
45.0 to 67.4 lbf
(A) Fan belt halfway
(Reference)
• If you can
not prepare the sonic belt tension
meter, check the fan belt tension by next
procedure.
a. Push the belt halfway between the fan drive
pulley and alternator pulley at a specified force
to measure the deflection (1).
NOTE
• If the measurement
is out of the service
specifications, loosen the alternator
mounting screws and adjust its position.
Deflection (B)
Service specifi-
cation
10.0 mm
0.39 in.
(Under load of 98 N
(10 kgf, 22 lbf))
(B) Deflection
4.4 Checking fan belt damage and
wear
1. Check the fan belt for damage.
(A) Good (B) Bad
2. If the fan belt is damaged, replace it.
3. Check
if the
fan belt is worn and sunk in the pulley
groove.
(A) Good (B) Bad
4. If
the fan belt is nearly worn out and deeply sunk in
the pulley groove, replace it.
CHECK AND MAINTENANCE
4. Check points of every 100 hours 3. MAINTENANCE
05-E4B SERIES,05-E4BG SERIES
3-9
KiSC issued 03, 2023 A