Cummins PT fuel injection system attendant adjustment

(1) the preparation before adjustment

Diesel engines should reach operating temperature; oil temperature should reach 74 �� above; injector parts numbers should be correct; flow should be in line with requirements; injector valve in accordance with the regulations and adjust better to throttle linkage transferred to the control of the whole open position (when the throttle to relax, before encountered throttle adjustment screw). Then will be installed to speed table PT fuel pump driveshafts time connecting devices.

(2) The governor of adjustment methods:

     to work in a diesel engine temperature. PTG spring from the governor components covered under Luosai screw fastening to raise Idle Idle adjustment screw, installed after idling for good Luosai.
The governor with the MVS PT fuel pump, the highest speed and idle adjustment screw in the governor back, it may be the rear of the idle speed screw fastening a locking nut first, then screw or screw a screw to obtain the necessary speed. For good immediately after fastening nut locked tight to prevent air mixing.
Factories are generally provided a diesel engine idle speed [United States Cummins diesel engine series, as recommended by the idle speed (600 �� 20) r / min]. Within the specified scope of the changes to allow a reasonable, but not excessive. Otherwise, it will cause difficulties linked to stall (idle speed too high) or less to load, or even diesel engines to stop.
Governor confirmed plunger is idling the reasons for the instability before the inspection in accordance with the regulations of the flyweight propelled out of the plunger.
     high-speed adjustment. Attendant checks diesel engines, must be loaded, tachometer and fuel gauge should have higher accuracy exports. Speed of change can be taken for the high-speed method of adjusting spring pads.
     governor disconnect point adjustment. Full throttle, the increased load, to be slowing down than the rated speed to low 100 r / rain, then gradually reduce the load observed fuel exports manometer (with the load reduction, fuel outlet pressure will be increased to governor restrictions on fuel began, and then started to decline).
Continue to reduce the fuel load until exports and reduce the pressure reached its peak 70 to 140 kPa, which is governor disconnect points. At this point, diesel engine speed higher than the rated speed of 20 ~ 40 r / min to ensure that the rated speed governor before will not restricting (such as diesel engine speed is 2100 r / min), then disconnect the point speed governor for 2120 to 2140 r / min. If the governor does not meet the required splitting point value, the change will be the governor-spring behind the gasket to adjust. Ran
, And then recheck governor breakpoint speed, until the required value.