INSTALL DELIVERY VALVE SPRING
AND WASHER, IF REMOVED.
Add clean engine oil to injection pump sump
(one pint). Set feed pump pressure to 2 PSI.
With control lever assembly in full forward
position and hi-idle stop screw removed, rack
position should be 20.0 21.0 mm (.787" .827") as
shown on dial indicator prior to start. Operate
calibrating stand at specified RPM and observe
rack position. Rack position should be 8.0 mm
(.315") as shown on dial indicator.
If preliminary governor cut-off does not come
adjustments inside governor housing are made
Remove seal wire and governor access
plug from side of governor housing.
Check control rack and governor assembly
for binding and correct if needed.
Adjust cut-off by increasing or decreasing
pre-tension of governor weight springs.
Use KDEP 2989 governor spring adjusting
wrench on cylindrical nut to make this
adjustment (Figure 6).
To raise governor cut-off, pre-tension is
pretension is decreased. "Cam" nut is
selflocking but must be turned 1/4 turns to
assure its being in locked position. Preload
of governor springs should range from 4 to
10 quarter (1/4) turns (clicks) from flush on
each side. Alter preload range as required.
Spring set may be one-half turn out of
balance with opposite set if necessary to
obtain desired governor cut-off.
Figure 6. Making Preliminary Governor Cut-Off
Adjusting Wrench KDEP 2989
Governor Cut-Off Adjusting Nut
If specified governor cut-off can not be
obtained by adjusting preload, remove
adjusting nut, spring seat and intermediate
spring. Add or remove intermediate spring
shims on both sides to achieve specified
control rack position and recheck (must end
up with same amount of shims on each
If specified governor cutoff cannot be
obtained by steps c, d or e, recheck "slider
to housing" and "S-plate" basic dimensions.
Install hi-idle stop screw and operate test stand,
with control lever assembly in full load position
(fully forward), at specified RPM. Check rack
setting on dial indicator and compare with
specifications given on CALIBRATION CHART.
If rack is not positioned within specified limits,
make hi-idle adjustments (Figure 7) as follows:
Printed in United States of America