1-S10
ZD21N-EC, ZD21-EC, ZD28-EC, WSM
ENGINE
[4] FUEL SYSTEM
W1013874
Item Factory Specification Allowable Limit
Injection Pump Injection Timing 0.33 to 0.37 rad
19.0 to 21.0°
before T.D.C.
–
Pump Element Fuel Tightness – 14.7 MPa
150 kgf/cm
2
2130 psi
Delivery Valve Fuel Tightness – 5 seconds
14.7 → 13.7 MPa
150 →140 kgf/cm
2
2130 → 1990 psi
Fuel Injection Nozzle Injection Pressure 13.7 to 14.7 MPa
140 to 150 kgf/cm
2
1990 to 2130 psi
–
Nozzle Valve Seat Fuel Tightness When the pressure is
12.7 MPa
(130 kgf/cm
2
, 1850 psi),
the valve seat must be
fuel tightness.
–
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