SERVICE MANUAL
CALIBRATION
Section 5
Check Fuel Shut-Off
27.
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
(.059 .079").
Figure 11. Adjusting External Stop Bracket
1.
Stop Bracket
2.
Stop Screw
3.
Shutoff Lever
Check Start Fuel Cutout
28.
This is an operating test made to assure that
control rack will move from start fuel to full load
fuel
position
at
specified
pump
speed.
Adjustment is made by varying the height of the
rack link adjustment screw.
Increase test stand speed slowly from 50 RPM
and
simultaneously
operate
control
lever
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
Figure 12)
a.
Using 10 mm Allen wrench, remove plug
from adjustment access hole in top of
governor housing.
b.
Loosen adjusting screw locknut (10 mm).
c.
If cutout occurred below specified speed,
turn adjusting screw counterclockwise and
if cutout occurred above specified speed
turn adjusting screw clockwise.
d.
Tighten adjusting screw locknut and repeat
test.
e.
Reinstall plug in adjustment access hole.
Figure 12. Adjusting Excess Fuel Rack Position
(Governor Housing Cut-Away for Illustration)
1.
Adjustment Screw
2.
Stop Shackle
CGES-375
Printed in United States of America
Page 8
