Kubota WSM STa-30, Workshop Manual

Page: 71 / 359

1-S9
ST
α
-30 · ST
α
-35, WSM ENGINE
COOLING SYSTEM
W1013874
FUEL SYSTEM
W1013973
Item Factory Specification Allowable Limit
Fan Belt Tension 7.0 to 9.0 mm (0.28 to
0.35 in.) deflection at
98 N (10 kgf, 22 lbs) of
force
–
Thermostat Valve Opening
Temperature
(At Beginning)
Valve Opening
Temperature
(Opened
Completely)
69.5 to 72.5 °C
157.1 to 162.5 °F
85 °C
185 °F
–
–
Radiator Water Tightness No leaks at
137 kPa
1.4 kgf/cm
2
20 psi
–
Radiator Cap Pressure Falling
Time 10 seconds or more for
pressure falling
from 88 to 59 kPa
from 0.9 to 0.6 kgf/cm
2
from 13 to 9 psi
–
Injection Pump Injection Timing 0.30 to 0.33 rad. (17 to
19 °) before T.D.C.
–
Pump Element Fuel Tightness – 14.7 MPa
150 kgf/cm
2
2133 psi
Delivery Valve Fuel Tightness 10 seconds or more for
pressure falling
from 14.7 to 13.7 MPa
from 150 to 140 kgf/cm
2
from 2133 to 1990 psi
5 seconds for
pressure falling
from 14.7 to
13.7 MPa
from 150 to
140 kgf/cm
2
from 2133 to
1990 psi
Injection Nozzle Injection Pressure 13.73 to 14.71 MPa
140 to 150 kgf/cm
2
1991 to 2133 psi
–
Injection Nozzle Valve Seat Valve Seat
Tightness When the pressure is
12.75 MPa
(130 kgf/cm
2
, 1849 psi),
the valve seat must be
fuel tightness.
–
KiSC issued 11, 2006 A