Page 271 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Setting the cutting-in speedTest chart column 7
Cutting-in speed is the speed at which the governor starts governing i.e. the control rack starts moving back
towards STOP.
Run the pump and set the control lever to the maximum speed stop. At the specified cutting in speed the control
rack should move back by 1 mm from the full load position. If not obtained, adjust the maximum speed stop screw
only.
Adjustment of degree of irregularity (only if specified) Test chart column 8.
With the control lever at the maximum speed stop, increase the speed further until the control rack returns to
the specified control rack position. The speed should be as specified. If not adjust both the notch screw and
the maximum speed stop screw so that the specified readings, given in columns 7 (cutting-in) and 8 (degree of
irregularity) are obtained.
Setting the starting travel of the control rack (only if specified) Test chart column 9.
Remove the control rack travel measuring scale. Fix circular control rack measuring scale H-S/EFEP 38. Run the
pump at the specified speed and set the control lever to the maximum speed stop. Set the control rack travel to
the specified value by adjusting the stop screw provided at the control rack end (Fig. 11). Secure with the lock-nut
and screw-in the closing cap for the control rack end
Testing the starting quantity (only if specified) Test chart column 10.
Run the pump at the specified speed and set the control lever to the maximum speed stop and
check the delivery quantity.
Securing and sealing the stops
On all the stops, which are intended for limiting the settings on pumps and governors the lock-nuts of the stop
screws should be tightened firmly before sealing.
The sealing wire should be fixed in such a way that it becomes impossible to adjust the stop without damaging
the wire or the seal
If tamper proof screws were provided for fixing end cover use new tamper proof screws and tighten till the
hexagonal head breaks off.

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CITS : Automotive - Mechanic Diesel - Exercise 15.3