Thermo King SB-190 30, Manual

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Engine Maintenance (Rev. 12/03)
45
1. Check the prefilter screen. Check the speed.
2. Bleed the air out of the fuel system. Check the speed.
3. Bleed the air out of the nozzles. Check the speed.
Make the engine speed adjustments with the engine fully
warmed up.
High Speed
1. Run the unit in high speed and check the high speed
rpm. It should be 2175 to 2225 rpm.
2. Shut the unit off.
3. Remove the control rod from the high speed solenoid.
4. Remove the boot from the high speed solenoid.
5. Pull the plunger out of the solenoid enough to loosen
the jam nut. An Allen wrench placed in the hex opening
in the face of the plunger will keep the plunger from
turning. Turn the plunger eye bolt clockwise to increase
the speed and counterclockwise to decrease the speed.
6. Replace the control rod, start the unit and check the
speed. When the speed is correct, tighten the jam nut
and replace the solenoid boot.
NOTE: If the correct speed cannot be set close
enough with half turns of the eye bolt, use the Allen
wrench to turn the plunger in smaller increments.
Low Speed
1. Loosen the jam nut on the low speed adjustment screw.
2. Run the unit in low speed. Adjust the screw to obtain
the correct speed. It should be 1425 to 1475 rpm.
3. Tighten the jam nut and recheck the speed.
1. High Speed Solenoid
2. Boot
3. Control Rod
4. Injection Pump
High Speed Adjustment
aea866
1
3
2
4