Figure 8. Adjusting Lo-ldle Position
Lo-Idle Stop Screw
Adjust Full Load Fuel Setting and Balance Delivery
This is an operating test to assure that the
injection pump provides the proper quantity of
fuel at full load setting and at the same time
provides a balanced fuel delivery between
pumping elements. Test and adjustment is
made as follows:
Operate test stand at specified RPM with
control lever in full load position (fully
forward) and specified boost pressure, note
rack position as shown on dial indicator.
If not within specifications remove cover
from rear of aneroid. Remove aneroid fuel
adjustment plate. Using KDEP 1047
loosen inner jam nut then adjust outer nut
clockwise to reduce power and fuel or
counterclockwise to increase power and
fuel (Figure 9).
Operate test stand for fuel delivery at
specified RPM and boost pressure for 1000
strokes. Read and record flow to each of
the six graduates.
If average fuel delivery for all pumping
elements and imbalance between individual
CHART), adjust affected elements (see
balanced delivery adjustment procedure).
Figure 9. Adjusting Full Load Fuel Setting
Balanced Delivery Adjustment Procedure
If fuel flow of one or more pumping elements are
not within specified balance limits given on
elements as follows:
NOTE: Loosen injection line nut prior to adjusting barrel
Loosen barrel flange clamping nuts.
Adjust barrels by turning clockwise (as
viewed from top) to increase delivery,
counterclockwise to decrease delivery.
ALWAYS USE BACK-UP WRENCH ON
DELIVERY VALVE HOLDER WHEN
TIGHTENING OR LOOSENING FUEL
INJECTION LINE NUT.
Check balance at low idle RPM. Adjust
throttle lever to obtain low idle delivery.
Maximum difference between cylinders is
1 cc from average at rated and ± 2 cc
from average at low idle.
Printed in United States of America