Page 262 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Remove guide lever along with guide sleeve assembly and fulcrum lever as a complete unit. Unhook starting
spring from fulcrum lever . If guide sleeve assembly requires replacement, remove with extractor and arbor
press.
Dismantling of stop lever assembly (if provided).
Remove hexagonal screw , closing screw

(if provided) and stop lever . Remove spring cap and spring . Before removing supporting lever with shaft , remove
full load stop screw and if necessary bearing bush.
Inspection of parts

Wash all the dismantled components thoroughly in clean fuel oil. The linkages/components should be carefully
examined and parts showing excessive wear must be replaced.
Note: Perfect movement of linkages/components is extremely important because stickiness or
excessive clearance will result in control rack reacting sluggishly to governor movement which in
turn will unfavorably influence the engine performance.
Flyweight assembly Inspection

If sliders, pivot pins, keyway and threads on link and flyweights are worn out or damaged, the complete flyweight
assembly must be replaced. Check whether flyweights move freely and can take up position shown in Fig 15.

Fig 15

Check the condition of woodruff key, replace if necessary.
Examine guide sleeve assembly to ascertain the condition of bearing surface for flyweight sliders. The surface
should not bepitted or worn out. Replace guide sleeve assembly, if found damaged.
Check ‘stop’ face of tension lever for damage/wear.
Check full load stop screw for wear/ pitting marks. Replace if necessary.
Check whether fulcrum lever is in good condition. The bottom pin, the bearing for guide lever pin and shackle
must not be worn out. There should not be excessive play between slider and link fork
The shafts of swiveling lever mustnot have excessive play in bearing bushes . If groove for retaining ring on
bearing bush is damaged replace the bearing bush.
The rocker on the swiveling lever should properly clamp the notch screw i.e. notch screw should not rotate freely.
Otherwise replace the swiveling lever.
The taper bore in the control lever must not be worn out. It should mate perfectly with the taper at the end of the
swiveling lever shaft.
The stop lever should not be excessively worn out and the corresponding bearing surface of governor cover
should be in good condition.

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CITS : Automotive - Mechanic Diesel - Exercise 15.3