Engine Tune-Up
torque of the adjusting screws is 24-36 in-lbs (3-4 Nm).
2. With the engine at operating temperature and no-
12. When all of the injector rack control levers are
load on the engine, place the speed control lever in the
adjusted, recheck their settings. With the control tube
maximum speed position. Turn the high-speed spring
lever in the full-fuel position, check each control rack as
retainer in (Fig. 6) until the engine is operating at the
in Step 7. All of the control racks must have the same
recommended no-load speed. Use an accurate hand
"spring" condition with the control tube lever in the full-
tachometer to determine the engine speed.
The
fuel position.
maximum no-load speed varies with the full-load
operating speed.
13. Insert the clevis pin in the fuel rod and the injector
control tube levers.
3. Hold the spring retainer and tighten the lock nut.
14. Turn the idle speed adjusting screw in until it
TYPE B GOVERNOR SPRINGS (Fig. 7):
projects 3/16" from the lock nut to permit starting the
1.
Start the engine and after it reaches normal
engine.
operating temperature, remove the load from the
15. Use new gaskets and replace the valve rocker
engine.
covers.
Adjust Maximum No-Load Engine Speed
All governors are properly adjusted before leaving the
factory.
However, if the governor has been
reconditioned or replaced, and to ensure the engine
speed will not exceed the recommended no-load speed
as given on the engine option plate, set the maximum
no-load speed as follows:
TYPE A GOVERNOR SPRINGS (Fig. 7):
1. Loosen the lock nut with a spanner wrench and back
off the high-speed spring retainer several turns. Then
start the engine and increase the speed slowly. If the
speed exceeds the required no-load speed before the
speed control lever reaches the end of its travel, back
off the spring retainer a few additional turns.
Fig. 7 - Governor Spring Assemblies
Fig. 6 - Adjusting Maximum No-Load Engine
Speed
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