Yanmar 6CXM-GTE2 Service Manual download pdf (Page 106)

- 3-43-18 -

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/

)

No. of injection

holes  injection

hole dia

6-0.29 6-0.30

Injection angle

155q

Valve lift 0.25 mm 0.30 mm

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Yanmar 6CXM-GTE2 Service Manual Page 106