Yanmar 6CXM-GTE, Руководство по обслуживанию

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3.11.18 Fuel injection nozzle
(1) Feature
The semi-long type hole-nozzle is used with the direct
injection combustion chamber.
Fuel from the injection pump enters through the oil port
in the nozzle holder, and enters the nozzle body reservoir.
When oil reaches the specified pressure, it pushes up the
nozzle valve held by the nozzle spring, and is injected
through the small hole on the tip of the nozzle body.
The nozzle valve is automatically pushed down by the
nozzle spring and closed after fuel is injected.
Oil that leaks from between the nozzle valve and nozzle
body goes from the hole on top of the nozzle spring
through the oil leakage fitting and back into the fuel tank.
Adjustment of injection starting pressure is effected with
the adjustment bolt.
(2) Nozzle specifications
Engine model 6CXM-GTE 6CXM-GTE2
Type Semi-long type hole-nozzle
Nozzle No. YDLL155S296CZ YDLL155S306CAZ
Yanmar part No. 127672-53000 127694-53050
Valve seat Single cone
Operating pressure 23.5 r 0.49 MPa (240 r 5kgf/
cm
2 )
No. of injection
holes
˜
injection
hole dia
6-0.29 6-0.30
Injection angle
155
q
Valve lift 0.25 mm 0.30 mm