Nanni N4.40, Workshop Manual

Page: 42 / 175

GENERAL
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
G-27
[12] CHECK POINTS FOR EVERY 1500 HOURS
CAUTION
• Examine the injection pressure and condition after you make sure that there is no one in the direction of
the fumes.
• If the fumes from the nozzle directly touches the human body, they can cause damage to the cells and
blood poisoning.
M00000003GEG0037US1
Nozzle Fume Condition
[D1503-M, D1703-M, D1803-M, V2003-M, V2203-M, V2403-M,
V2403-M-T, D1703-M-BG, V2003-M-BG, V2003-M-T-BG,
V2203-M-BG, V2403-M-BG]
1. Set the injection nozzle to a nozzle tester, and examine the
condition of the fumes from the nozzle.
2. If the fume condition is defective, replace the nozzle piece.
M00000003GEG0038US1
Nozzle Fume Condition
[D1803-M-DI, V2403-M-DI, V2403-M-DI-T]
1. Set the injection nozzle to a nozzle tester, and examine the
condition of the fumes from the nozzle.
2. If the fume condition is defective, replace the injection nozzle
assembly.
M00000003GEG0039US1
Fuel Injection Pressure
[D1503-M, D1703-M, D1803-M, V2003-M, V2203-M, V2403-M,
V2403-M-T, D1703-M-BG, V2003-M-BG, V2003-M-T-BG,
V2203-M-BG, V2403-M-BG]
1. Set the injection nozzle to a nozzle tester.
2. Slowly move the tester lever to measure the pressure at which
the fuel start to jet out from the nozzle.
3. If the measurement is out of the factory specifications, replace
the adjusting washer (1) in the nozzle holder.
(Reference)
• The pressure variation with 0.025 mm (0.00098 in.) difference
in washer thickness is approximately 590 kPa (6.0 kgf/cm
2
,
85 psi).
M00000003GEG0040US1
(A) Good (B) Bad
(A) Good
(B) Bad (a) 1.3 rad (72 °)
Fuel injection pressure Factory spec.
13.73 to 14.70 MPa
140.0 to 150.0 kgf/cm
2
1992 to 2133 psi
(1) Adjusting Washer
KiSC issued 06, 2009 A