Kubota EA330-E4 Series - Cooling System

ENGINE
EA330-E4, WSM
1-S17
(3) Cooling System
Fan Belt Tension
1. Check to see the belt tension allows a depression of the
specified amount when the belt is pressed down by a finger
midway between the cooling fan pulley (2) and tension pulley
(5).
2. Adjust the tension by the tension bolt (6).
* The FM type refers to a low edge plain type, which is a van
rope for general fans having a upper canvas width of 11.0 mm
(0.433 in.) and a height of 8.0 mm (0.31 in.).
NOTE
• Whenever a new fan belt is installed, provide a tension
somewhat higher than specified, and adjust it as specified
after running the fan for some time.
9Y1211018ENS0010US0
Fan Belt Damage and Wear
1. Check the fan belt for wear.
2. Check if the fan belt is worn and sunk in the pulley groove.
3. Replace the fan belt if the belt is nearly worn out or deeply sunk
in the pulley groove.
9Y1211018ENS0011US0
Radiator Water Tightness
1. Fill the radiator with water to the specified amount and warm up
the engine.
2. Set a radiator tester and raise the water pressure to the
specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pin hole, repair with the radiator cement,
and for other leaks, replace the radiator.
CAUTION
• During operation or immediately after operation, coolant in
the radiator is extremely hot.
If the radiator cap is removed, hot water may gush out,
causing scalding. Open the radiator cap after the engine
has cooled.
9Y1211018ENS0012US0
Fan belt tension Factory specification
5.0 to 10 mm
0.20 to 0.39 in.
Size of fan belt FM 32.5
(1) Fan Drive Pulley
(2) Fan Pulley
(3) Tension
(4) Force of 98 N (10 kgf, 22 lbf)
(5) Tension Pulley
(6) Tension Bolt
(1) Defective Belt
Radiator water tightness Factory specification
No leak at
190 kPa
1.9 kgf/cm
2
27 psi
KiSC issued 05, 2015 A