DETROIT DIESEL 53
LIMITING SPEED GOVERNOR 2.7.1
Adjustment of the engine idle speed is accomplished by
changing the force on the low speed spring by means of the
idle speed adjusting screw. Refer to the tune-up section for
idle speed adjustment.
The engine maximum no-load speed is determined by the
force exerted by the high speed spring. When the throttle
control lever is placed in the maximum speed position, the
engine will operate at a speed where the force exerted by the
governor high speed weights will equal the force exerted by the
governor high speed spring.
Adjustment of the maximum no-load speed is accomplished by
changing the tension on the high speed spring. Refer to the
tune-up section for the maximum no-load speed adjustment.
Lubrication
The governor is lubricated by oil splash from the engine gear
train and by a pressure line on current engine models. The oil
passes through the governor weight housing on to the shaft
and weight assemblies. The oil is distributed to the various
moving parts within the governor by the revolving weights.
Surplus oil drains from the governor through holes in the
governor bearing retainer back to the engine gear train.
Fig. 2 Governor Cover Details and Relative
Remove Governor from Engine
Location of Parts
Before removing the governor from the engine, the operation
should be checked as outlined in Section 2.7. If the
governor fails to control the engine properly after performing these checks, remove and recondition it.
1. Disconnect the linkage to the governor control levers.
2. Remove the governor cover and gasket.
3. Detach the spring housing from the governor housing by removing the two bolts and lock washers.
4. Loosen the high speed spring retainer lock nut with spanner wrench J 5345-5 and remove the spring
assembly.
5. Loosen the fuel rod cover hose clamps.
6. Clean and remove the rocker cover from the cylinder head.
7. Disconnect the fuel rod from the injector control tube lever. Remove the clip that holds the fuel rod to the
differential lever and lift the fuel rod from the lever.
8. Detach the fuel pump by disconnecting the fuel lines and removing the three bolts. Also, disconnect the
lubricating oil line, if used.
9. Remove the five bolts from the governor weight housing and the two bolts from the governor control
housing.
10. Detach the governor and gasket from the engine.
Disassemble Governor Cover
1. Remove the return spring and clip from a single lever cover only, then loosen the governor speed control
lever retaining bolt and lift the control lever from the speed control shaft ( Fig. 2).
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