TM 9-2815-237-34
2-35. (6.5L) FUEL INJECTION PUMP (DB2831-5149) CALIBRATION (Cont’d)
22. Fuel delivery measurement
(a) In order to minimize variations between readings due to residual oil in the graduates, the
following timed cycle should be used:
(1) Draw
(2) Settle 30 seconds
(3) Drain 30 seconds
(5) Settle 30 seconds
(6) Read graduates
(7) Repeat cycle and average readings
(b) Check points:
(1) At 1500 rpm WOT) de-energize electric shutoff solenoid. Delivery should be 4 mm3/stroke
maximum.
(2) Re-energize electric shutoff solenoid and check delivery against the chart below.
THROTTLE
MM
3
/
CAM MOVEMENT
PRESSURE
RPM
POSITION
STROKE*
(DEGREES)
TRANSFER PUMP
HOUSING
150
Low idle
28 min.
16 psi (110 kPa) min.
0-12 psi (0-83 kPa)
400
WOT
43 min.
400
WOT**
4 max.
400
Low idle***
700
Low idle
12-16
1.0 min.
8-12 psi (55-83 kPa)
700
Low idle
1.25 min.
0-1 psi (0-7 kPa)
2000
WOT
56 max.
****
60-62 psi (414-427 kPa)
3200
ADJ
21.5-23.5
4.0-6.0
3400
WOT
49-52
3.50-4.50
3500
WOT
45 min.
3650
WOT
31.5 min.
3900
WOT
15 max.
125 psi (862 kPa) max.
* Maximum cylinder variation should be ± 6 mm3 from the average flow of all cylinders.
** With electric shut-off solenoid de-energized.
*** Check electric shutoff solenoid for pull-in with 8.8 volts maximum.
**** Minimum of 1.25 degrees more than reading.
23. Disconnect pump and mount in holding fixture.
24. Using air timing gauge, check pump timing. Set to + 0.25 degree ± 0.50 degree.
25. Tighten all fasteners to specifications, refer to para. 2-32d.
26. Apply sealing compound as follows:
(a) Apply one drop at interface of maximum travel screw and locknut.
CAUTION
Do not allow sealing compound to enter gap between face cam
housing. Binding of the throttle shaft may result.
and
(b) Apply one drop to threaded end of face cam screw where it protrudes from face cam.
(c) Apply one drop to interface of servo advance adjusting screw and rocker lever, making sure
sealing compound does not enter hex recess of screw.
27. Install tamper-proofmg capon guide stud.
2-140
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