Page 274 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Fig 4

Remove diaphragm (Fig 5). Unscrew nut and remove guide piece (where provided) and pivot pin from pump
control rack.
Lever shaft assembly
Un-hook spring from thrust lever .Remove screw (Fig 6). Loosen hexagonal screw remove stop lever and
woodruff key .
On new type of MZ governors the stop lever can be removed by taking out the cheese head screw and spring
washer. Remove split pins from both sides of the lever shaft Take out the lever shaft along with washers and shims.
Remove thrust lever and spring from governor housing. If necessary remove governor housing by unscrewing
the screws and after having lifted the roller tappets off the camshaft with tappet lifters.

Fig 5

Control rack stop cum excess fuel device
Unscrew the locknuts and remove excess fuel device from pump housing. Remove threaded bush and engaging
bolt from control rack. Remove pin fromhousing by tapping with a punch. Remove push button and spring from
housing.

Inspection of Governorparts
Wash all the dismantled components (except the diaphragm) thoroughly in clean fuel oil. Diaphragm should not
be washed in kerosene, diesel or trichloroethylene as it will remove the impregnating oil which keeps diaphragm
supple. Examine parts carefully and replace the parts showing excessive wear/damage.

257

CITS : Automotive - Mechanic Diesel - Exercise 15.4