Page 270 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Fig 31

Note: These readings do not indicate the actual control rack travel but only the difference in control
rack travel between maximum and minimum specified speeds. If the readings are not obtained,
replace the adaption capsule or the shims. After adjustment, tighten the lock-nut of the adaption
capsule.
Testing the course of delivery at the torque control range(only if specified) Test chart column 4
Run the pump at the specified speeds, keeping the control lever at the maximum speed stop and check the
values. If the values are not obtained readjust the adaption capsule and tighten the lock-nut.
Fig 32

Adjusting and testing the idling speed control(governing at lower range) Test chart column 5.
Setting the supplementary idling spring:
Run the pump at the rated Idling speed (framed value). Move the control lever close to the specified angle, until
the control rack moves to 0.5-1.0 mm loss than the specified (framed) control rack travel. Then screw in the
supplementary idling spring (Fig 32) until the control rack moves to the specified framed value in the Test chart.
Tighten the lock-nut slightly and check the readings. If the specified values are not obtainable, re-adjust the
control lever and supplementary idling spring.
Setting the idling stop screw(in the case of governors with stop lever).
With the control lever in the above idling position screw-in the idling top screw till it touches the swivelling lever.
Tighten the lock-nut.
Testing the maximum speed control at upper range(with supplementary idling spring) Test chart
column 6.
Set the control lever to the maximum speed stop and check the specified readings.

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CITS : Automotive - Mechanic Diesel - Exercise 15.3