Check Fuel Shut-Off
This adjustment is made to protect pump internal
stop and rack from damage. Adjustment is
made by loosening stop bracket against which
shutoff lever will strike (Figure 11). Operate
shutoff lever to rear and hold in this position
(rack against internal stop). Reposition external
stop lever bracket so that shutoff lever will
contact bracket stop screw just before rack
would be stopped by the internal stop. Rack
setting (dial indicator reading) with rack against
external stop should be between 1.5 2.0 mm
Figure 11. Adjusting External Stop Bracket
Check Start Fuel Cutout
This is an operating test made to assure that
control rack will move from start fuel to full load
Adjustment is made by varying the height of the
rack link adjustment screw.
Increase test stand speed slowly from 50 RPM
between lo-idle and hi-idle stops until cutout
occurs and observe test stand speed. Test
stand speed should be between specified RPM.
If specified test speed is not obtained, reposition
rack link adjusting screw height as follows: (See
Using 10 mm Allen wrench, remove plug
from adjustment access hole in top of
Loosen adjusting screw locknut (10 mm).
If cutout occurred below specified speed,
turn adjusting screw counterclockwise and
if cutout occurred above specified speed
turn adjusting screw clockwise.
Tighten adjusting screw locknut and repeat
Reinstall plug in adjustment access hole.
Figure 12. Adjusting Excess Fuel Rack Position
(Governor Housing Cut-Away for Illustration)
Printed in United States of America