TM-9-2815-213-34
ENGINE, DIESEL, WITH ACCESSORIES CUMMINS MODEL V8-300 (2815-910-8217)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING DIRECT SUPPORT AND GENERAL SUPPORT REPAIR PARTS LIST AND DEPOT MAINTENANCE ALLOWANCES)
FEBRUARY 1972
TM-9-2815-213-34 - Page 77 of 192
*TM 9-2815-213-34
Figure 3-89. Thrust washer-drive plunger governor
clearance.
CAUTION
When installing governor weight assembly, do not press
against weights. Press against center of weights carrier
shaft.
(1) Using oil seal assembly tool (35, fig. B-28) and
suitable press, install first oil seal into cover with lip
toward inside of cover. Then, install second oil seal into
reverse side of cover with lip toward inside of cover (fig.
3-76).
(2) Assemble remaining components in reverse
order of disassembly (para. 3-102.a. (3)).
NOTE
When weight assist plunger is installed in
weight carrier assembly it must protrude
0.840/0.860 inch.
f.
Fuel Pump Damper Assembly
. Assemble
damper assembly in reverse order of disassembly (para
3-102.a. (2)).
g.
Fuel Shut-Off Solenoid Valve Assembly
.
Assemble solenoid valve in reverse order of disassembly
(para. 3-102.a. (1)). Use new preformed packing, O-
Ring, and gaskets for assembly.
3-107. Fuel Pump Test and Calibration
a.
General
. PT type G fuel pump is tested and
calibrated on the fuel pump test stand (fig. 3-80).
b.
Fuel Pump Test and Calibration Data.
Engine model .
.................................
V8 300
Pump code .
.....................................
50CR3000
HP C rpm (sea level) .
......................
300 @ 3000
Fuel rate-lb hr min/max .
..................
119/124
Engine fuel pressure min/max.
........
215 235
Flow meter-lb hr @ rpm.
..................
560 @ 3000
Governor-cutoff rpm .
......................
3020 3040
Set-p.s.i. @ max rpm .
....................
40 @ 3250
Throttle leakage--cc .
......................
35
Idle speed-p.s.i. @ rpm.
..................
22 @ 600
Manifold pressure p.s.i. @ rpm.
......
227 @ 3000
Check point 1 p.s.i. @ rpm.
.............
165/173 @ 200
Check point 2 p.s.i. @ rpm.
.............
117/125 @ 2000
Weight assist p.s.i. @ rpm .
.............
46/54
800
Weight assist setting .
.....................
890/910
Gear pump size.
..............................
3/4
Idle plunger code No .
.....................
40
Torque spring-part No.
....................
142698
Torque spring-color code .
...............
WHITE-BROWN
Torque spring--hims .
......................
NONE
Governor spring-part No .
................
147292
Governor spring--color code .
..........
BROWN
Governor weight-part No.
................
107261
Injector-part No .
..............................
BM97421
Injector-flow code .
..........................
117
Piston-part No .
...............................
172580
Camshaft-part No .
..........................
155500
c.
Test Fuel
. Fill fuel pump test stand with
authorized fuel.
d.
Precalibration Tests
. The precalibration tests
(para. 3104.b., 3-104.d.) are to be performed to check
porosity of fuel pump housing, excessive leakage, or low
gear pump output, prior to calibration on the fuel pump
test stand.
e.
Mounting Pump For Calibration
. Refer to
paragraph 3-104.c., for procedures.
f.
Fuel Pump Run-.In.
(1) Completely open the fuel pump manual override
knob (fig. 3-73).
(2) Open throttle to maximum position and secure
with spring (fig. 3-82).
(3) Start test stand motor and run pump at 500 rpm.
(4) If pump is newly rebuilt or has been
disassembled and reassembled, run at slightly overrated
speed of 3000 rpm for 5 minutes to flush, allow bearings
and seals to seat, and to purge air from system.
(5) Check pump fuel flow in the flow meter for air. If
air is present, correct the leak before continuing. Refer to
paragraph 3-104.d. (8) and (9).
(6) Check main throttle shaft for proper shimming
(fig. 3-90) to insure main throttle port is completely open.
(7) Periodically check the fuel to insure that it is 80
to 100 degrees Fahrenheit and clean of all foreign
matter.
NOTE
If visual inspection or run-in check indicate
internal problems perform inspection of the
disassembled pump.
3-48
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