August 2016Section 4 • Repair Procedures
4 - 12 AL4 • AL4000 Part No. 218567
Engine
4-1
Engine RPM
How to Adjust the Engine RPM
Note: Perform this procedure with the light
switches in the off position and with no external AC
power devices connected to the power outlets at
the control box.
1 Start the engine, and allow the engine to warm
to normal operating temperature.
2 With a multimeter set to read AC frequency
(Hz), connect the multimeter leads to one of the
outlets at the control box and note the reading.
6 kw and 8 kw:
Result: The reading is 60 to 61.5 Hz. The
engine RPM is set correctly.
Result: The reading is less than 60 Hz OR the
reading is greater than 62 Hz. The engine RPM
is not set correctly and should be adjusted.
Proceed to step 3.
7 kw:
Result: The reading is 61.5
+
/- 0.5 Hz. The
engine RPM is set correctly.
Result: The reading is less than 61 Hz OR the
reading is greater than 62 Hz. The engine RPM
is not set correctly and should be adjusted.
Proceed to step 3.
3 Using the illustrations as a guide, locate the
engine speed adjustment screw. Loosen
the locknut, then turn the adjustment
screw clockwise to increase the RPM or
counterclockwise to decrease the engine RPM.
Tighten the locknut and repeat this procedure
beginning with step 2.
Kubota D1105 Engine
a adjustment screw
Perkins 403D-11
a jamb nut
b adjustment screw
a
ab
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