Fuel Pump Test and Calibration

*TM 9-2815-213-34

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 ......................

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

Figure 3-89. Thrust washer-drive plunger governor

Injector-part No ............................... BM97421

clearance.

Injector-flow code ........................... 117

CAUTION

Piston-part No ................................ 172580

When installing governor weight assembly, do not press

Camshaft-part No ........................... 155500

against weights. Press against center of weights carrier

c. Test Fuel. Fill fuel pump test stand with

shaft.

authorized fuel.

(1) Using oil seal assembly tool (35, fig. B-28) and

d. Precalibration Tests. The precalibration tests

suitable press, install first oil seal into cover with lip

(para. 3104.b., 3-104.d.) are to be performed to check

toward inside of cover. Then, install second oil seal into

porosity of fuel pump housing, excessive leakage, or low

reverse side of cover with lip toward inside of cover (fig.

gear pump output, prior to calibration on the fuel pump

3-76).

test stand.

(2) Assemble remaining components in reverse

e. Mounting Pump For Calibration. Refer to

order of disassembly (para. 3-102.a. (3)).

paragraph 3-104.c., for procedures.

NOTE

f. Fuel Pump Run-.In.

When weight assist plunger is installed in

(1) Completely open the fuel pump manual override

weight carrier assembly it must protrude

knob (fig. 3-73).

0.840/0.860 inch.

(2) Open throttle to maximum position and secure

f. Fuel Pump Damper Assembly. Assemble

with spring (fig. 3-82).

damper assembly in reverse order of disassembly (para

(3) Start test stand motor and run pump at 500 rpm.

3-102.a. (2)).

(4) If pump is newly rebuilt or has been

g. Fuel Shut-Off Solenoid Valve Assembly.

disassembled and reassembled, run at slightly overrated

Assemble solenoid valve in reverse order of disassembly

speed of 3000 rpm for 5 minutes to flush, allow bearings

(para. 3-102.a. (1)). Use new preformed packing, O-

and seals to seat, and to purge air from system.

Ring, and gaskets for assembly.

(5) Check pump fuel flow in the flow meter for air. If

air is present, correct the leak before continuing. Refer to

3-107. Fuel Pump Test and Calibration

paragraph 3-104.d. (8) and (9).

a. General. PT type G fuel pump is tested and

(6) Check main throttle shaft for proper shimming

calibrated on the fuel pump test stand (fig. 3-80).

(fig. 3-90) to insure main throttle port is completely open.

b. Fuel Pump Test and Calibration Data.

(7) Periodically check the fuel to insure that it is 80

Engine model .................................. V8 300

to 100 degrees Fahrenheit and clean of all foreign

Pump code ...................................... 50CR3000

matter.

HP C rpm (sea level) ....................... 300 @ 3000

NOTE

Fuel rate-lb hr min/max ................... 119/124

If visual inspection or run-in check indicate

Engine fuel pressure min/max ......... 215 235

internal problems perform inspection of the

Flow meter-lb hr @ rpm................... 560 @ 3000

disassembled pump.

3-48