Page 267 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Commencement of delivery of other elements should be adjusted according to the cam sequence starting from
cylinder No. 1. Tolerance of +0.5 is permissible on the cam displacement angles.
Example:
For 4 cylinder: 90±0.5° For 6 cylinder: 60 +0.5”
The tappet clearance in each cylinder should be checked immediately after setting (on ‘A’ size pumps minimum
0.2 mm).
Basic setting
The basic setting of fuel delivery is considered as pre-setting, uniform setting of elements, in order to check the
condition of ‘element-delivery” valve combination.(Fig 23)
“Maximum spread in delivery quantity means the difference between the individual cylinders in one pump
Adjustment
‘A’ size pumps-by adjusting control sleeve Psize pumps by turning the element delivery valve assembly flange.
After calibration of pump is over, fix the governor cover assembly with screws and proceed as per the recommended
sequence of operations
1 Mechanical testing
Unscrew the stop/idling stop screw and supplementary idling spring. Unscrew adaption capsule using combination
wrench 03-EFEP 202. (Fig 24 & 25)
Note: Test specification chart columns 1to 10
Control lever at stop position, adjust control rack measuring scale to ‘0’ and screw in the stop/ idling stop screw
so that the control rack moves 0.3-1 mm from the STOP position.

Fig 23

Fig 24 Fig 25

Bring the control lever to the maximum position and run the pump at 20 rpm below the maximum rate speed the
governor should not cut-in. If it cuts-in, tighten the notch screw of swivelling lever.

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CITS : Automotive - Mechanic Diesel - Exercise 15.3