Table 6-3. Fuel Pump Calibration Specifications and Technical Data

SECTION IV. MAINTENANCE OF FUEL INJECTORS

TM-9-6115-604-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 5 Kw. 1 Phase-2 Wire 1 Phase -3 Wire 3 Phase -4 Wire 120. 120/240 and 120/208 Volts Manual
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TM 9-6115-604-34 NAVFAC P-8-633-34 Table 6-3. Fuel Pump Calibration Specifications and Technical Data ITEM SPECIFICATION Lower Throttle Shaft Rotation Counterclockwise to open Upper Throttle Shaft Rotation Clockwise to open Test Oil Temperature 90 to 100F (32 to 38C) 135F (57"C) maximum allowable Fuel Rate 426 to 444 lbs/hr (192 to 200 kg/hr) Fuel Rail Pressure 176 to 194 psi (1214 to 1338 kPa) at 1800 rpm Lower Governor Cut Off Speed 2010 to 2040 Upper Governor Cut Off Speed 1910 to 1940 rpm Throttle Leakage 110 cc/min. at 1800 rpm Idle Speed Flow 310 ±15 cc/min. at 600 rpm Throttle Travel (Rotation) 27 to 29 degrees Calibration Pressure 185 psi (1276 kPa) Calibration Flow 1275 lbs/hr (575 kg/hr) Check Point Pressure 137 to 143 psi (945 to 986 kPa) Check Point Flow 1080 lbs/hr (486 kg/hr) (4) If the fuel pressure is more or less than this proceed as follows: (a) Check that the correct high speed governor spring (12, Figure 6-11) has been installed, and that the high speed governor spring is seated properly. Governor spring shims (10) may be added or removed in accordance with step c(7), above. If the high speed governor spring (12) is replaced, or If governor spring shims (10) are added or removed, the fuel pump must be recalibrated commencing with step b, above. (b) Check the protrusion of the shoulder pin (1, Figure 6-12) in accordance with paragraph 6-10, step f. Shims (2) may be added behind the shoulder pin (1) if the fuel pressure is less than 137 to 143 psi (945 to 986 kPa), or removed if the fuel pressure is more than this. Shims (2) are available in 0.007 and 0.015 inch (0.18 and 0.38 mm) thicknesses. (5) Once fuel pump testing and calibration is completed, reset the shutoff valve (Figure 6-10), (set open in step b (4), above) to is original closed position by turning the knob (2) counterclockwise as far as it will go. Do not force. (6) The throttle shaft (45, Figure 6-11) may now be locked in the fully open position (rotated fully counterclockwise). During engine operation engine speed will be automatically controlled by the electric governor control (Figure 6-30) and the actuator (4, Figure 6-5). Loosen the hexagonal nut (54, Figure 6- 11), located towards the rear of the fuel pump housing (66), and turn in the corresponding adjusting screw (55) until it contacts the control end (51). The control end (51, Figure 6-11) should now be fixed between the adjusting screw (55), located towards the rear of the fuel pump housing (66), and the adjusting screw (55), located towards the front of the fuel pump housing. Lock the adjusting screw (55), by tightening the hexagonal nut (54). (7) Remove the locking pliers and universal spring from the throttle shaft (45, Figure 6-11), and from the throttle shaft (30, Figure 6-11), if not ready removed in step c (11), above. (8) Replace the throttle shaft cover (43) on the fuel pump housing (66) with the rivets (42). (9) Disconnect the fuel supply, outlet, and return hoses (5, 1, and 3, Figure 6-16) from the fuel pump, and remove the fuel pump from the pump drive adapter (2, Figure 6-15). 6-39

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