SERVICE MANUAL
CALIBRATION
Section 5
NOTE: Balance should be maintained to as close a
tolerance
as
is
reasonably
possible
to
prevent
readjustment in later tests.
Fuel Delivery at Lo-Idle Check
23.
This is an operating test to assure that the
injection pump provides the proper quantity of
fuel at lo-idle. Test and adjustment are made as
follows:
a.
Operate test stand at specified RPM with
control lever in lo-idle position (fully back)
for 1000 strokes.
b.
Record fuel delivery from elements and
compare results with specifications given
on CALIBRATION CHART.
c.
Check balanced delivery between pumping
elements and compare imbalance with
specifications
given
on
CALIBRATION
CHART.
d.
Adjust fuel delivery and imbalance (see
Test 21).
Check Fuel Delivery at Torque Check Speed
24.
This is an operating test to assure proper pump
and governor operation. Perform the test as
follows:
a.
Operate stand at specified RPM with
control lever locked in full load (fully
forward) position for 1000 strokes.
b.
Record fuel delivery from elements and
check
for
balanced
delivery
between
pumping
elements
and
compare
with
specifications
given
on
CALIBRATION
CHART. If not within specifications repeat
Steps 20, 21 and 22.
Check Aneroid Controlled Power and Fuel (Cutback)
25.
Check with boost line disconnected. If not within
specifications proceed as follows:
a.
Remove cap from rear of aneroid.
Figure 10. Adjusting Aneroid Cutback
1.
KDEP 1048
2.
Aneroid
b.
Using KDEP 1048 (Figure 10) turn socket head
screw clockwise to increase power and fuel or
counterclockwise to decrease power and fuel.
Check
Low
Speed
Power
and
Fuel
(Aneroid
Controlled)
26.
This adjustment is for correct spring preload. If
not within specifications on calibration chart
(Step 14) adjust as follows:
a.
Remove recessed hex head plug from top
of aneroid. Use a screwdriver as a lever for
turning the star wheel.
b.
If power or fuel are below specifications
engage screwdriver blade with star wheel
pushing screwdriver towards engine. This
reduces spring preload, increasing power
and fuel.
c.
If power or fuel are above specifications pull
engaged screwdriver away from engine,
increasing spring preload and reducing
power and fuel.
After adjustments are made make sure Steps 21
and 25 are still correct.
CGES-375
Printed in United States of America
Page 7
