Stage Di Nozzle - wsm M6040 Workshop Manual

M6040, M7040, WSM

[2] 2 STAGE DI NOZZLE

To stop engine
When the stop solenoid is turned off, the spring
tension of the solenoid is released, the rod extrudes and
the stop lever moves the control rack in the direction of
the arrow "B" which stops the engine.
To stop the engine manually, move the external stop
lever to the left.
Exhaust and noise regulations are becoming
increasingly strict, particularly in regard to the reduction
of NOx (nitrogen oxides) and particulates.
The two-spring nozzle holder has been developed to
reduce NOx (nitrogen oxides) and particulates from
direct injection diesel engine exhaust.
 Features
The two-spring nozzle holder limits needle valve lift
at initial valve opening to throttle the injection quantity.
Main injection occurs when the in-line pressure has
increased sufficiently to move the needle valve through
its full lift.
This gives the following features.
• Improved engine stability at low and intermediate
speeds.
• Decreased engine hunting and surge.
• Decreased noise at idling.
• Decreased idling speed because of improved engine
stability.
• Stabilized fuel injection characteristics from the
injection pump and nozzle system, and easier
matching of governor characteristics to engine
demand.
(1) Nozzle Holder Body
(2) 1st Stage Injection Pressure
Adjusting Shim
(3) First Spring
(4) Pressure Pin
(5) Spring Seat
(6) 2nd Stage Injection Pressure
Adjusting Shim
1-M12
ENGINE
9Y1210143ENM0019US0
(7) Second Spring
(8) Pre-lift Adjusting Spring Seat
(9) Chip-packing
(10) Max-lift Adjusting Washer
(11) Retaining Nut
(12) Nozzle
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KiSC issued 07, 2012 A