TM 9-2910-226-34 pumps). Fuel pressure should be 30-40 psi. With operating lever in idle position, adjust low-idle speed screw to obtain fuel flow per Table 3-5 or 3-4. If reading is not within limit, loosen idle adjustment screw locknut and turn idle adjustment screw (fig. 3- 173). Turn screw clockwise to increase fuel delivery and counterclockwise to decrease fuel delivery. Adjust screw to obtain specified flow, and tighten screw locknut. (8) Check 2600 rpm full-load fuel flow. If fuel. flow does not fall within limits repeat steps (2) through (7) above. (9) Reduce test stand rpm to a minimum. When speed reaches minimum push drive motor stop button (DD, fig. 3-162) and turn speed shifting crank (S) to LOW RANGE. (10) Restart the test stand and adjust speed to 150 rpm with operating lever in full-load position, set count at 1000 and collect fuel in fuel burettes. Check fuel pressure gage (A). Reading should be 7 psi minimum. Fuel flow should be in accordance with Table 3-5 or 3-4. If fuel pressure is below 7 psi, in- spect fuel supply pump (para 3-20). If fuel flow is below the specified minimum, the hydraulic head and plunger are excessively worn and the head must be replaced. Replace hydraulic head assembly if proper flow is not obtained, and retest the pump. (11 ) Pull injection pump fuel shutoff rod. Fuel should stop flowing immediately each time the rod is pulled. If fuel does not stop, check fuel shutoff to make certain the rod is properly engaged with the control unit lever. (12) On code G pumps, set droop screw per special instructions in Table 3-5. On code E pumps, set droop screw per special instructions in Table 3-4. d. Calibration of Code B and F Pumps. Calibrate injection pump code B or F using Table 3-6. (1) Use two-hole injector nozzle and holder assemblies (fig. 3-163, 3-169 and 3-170) with code F pump, and one-hole injector nozzle and holder assemblies with code B injection pump. NOTE Code B pumps used to replace code F pumps must be calibrated with two hole nozzles. After calibration, tag the pump making one of the following statements as applicable: FOR USE ON CODE B ENGINE ASSEMBLY (LDS-465-lA) FOR USE ON CODE F ENGINE ASSEM- BLY (LDS-465-1) (2) Adjust speed to 2850 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 60-80 psi. Fuel flow should be in accordance with Table 3-6, depending on fuel used. Fuel flow adjustment is made by ad- justing high-speed adjustment screw (fig. 3-173). (See step c. (2) above for procedure.) (3) Adjust speed to 2600 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 60-80 psi. Adjust stop plate guide screw (fig. 3-174) to obtain fuel flow per table 3-6. (See step c. (3) above for procedure, ) (4) Adjust speed to 2940 rpm and check fuel flow, Flow should be 5 cc or less to meet specification. If fuel flow is not to limit, the pump must be shut down and the high-speed (inner) governor spring and spacer(s) must be checked and adjusted. (See step c. (4) above for procedure). Check condition of fuel control unit and pin (para 3- 44). (5) Adjust speed to 1200 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 40-55 psi. Adjust droop screw to obtain fuel flow per Table 3-6. (See step c. (5) and c. (6) above for procedure.) (6) If fuel flow cannot be adjusted to these limits, check engagement of compensator stop plate and linkage and angular position of smoke limit torque cam. (See steps c (5) and (6) above for procedure.) (7) Reduce speed to 700 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 30-40 psi. With operating lever in idle position, adjust low idle adjustment screw (fig. 3-173) to obtain fuel flow per Table 3-6. (See step c(7) above for procedure. ) (8) Check 2600 rpm full-load fuel flow. If fuel flow does not fall within limits, repeat (2) through (7) above. (9) Reduce test stand rpm to a minimum. When speed reaches minimum, push drive motor stop button (DD, fig. 3-162) and turn speed shifing crank (S) to LOW RANGE. (10) Restart the test stand and adjust speed to 150 rpm with operating lever in full-load position. Set count at 1000 and collect fuel in fuel burettes. Fuel flow should be in accordance with Table 3-6. If the fuel flow is below specified limit, the hydraulic head and plunger are excessively worn and the head must be replaced. Replace hydraulic head assembly if proper flow is not obtained, and retest the pump. (11) Pull injection pump fuel shut-off rod. Fuel should stop flowing immediately each time the rod is pulled. If fuel does not stop, check fuel shut-off to make certain the rod is properly engaged with the control unit lever. e. Calibration of Code A Pump. Calibrate code A injection pump using Table 3-7. (1) Use one-hole nozzle and holder assemblies. (2) Adjust speed to 3100 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 60-80 psi. Fuel flow should be in accordance with Table 3-7, depending on fuel used, Fuel flow adjustment is made by ad- justing high-speed adjustment screw (fig. 3-173). (Refer to step c (2) above for procedure. ) (3) Adjust speed to 2800 rpm and check fuel pressure on gage (A, fig. 3-162) at compensator inlet. Fuel pressure should be 60-80 psi. Adjust stop plate guide screw (fig. 3-174) to obtain fuel flow per Table 3-7. (Refer to c (3) above for procedure. ) (4) Adjust speed to 3150 rpm and check fuel flow. Flow should be 5 cc or less to meet specification. If fuel flow is not within limit, the pump must be shut down and the high-speed (inner) governor spring must be checked and adjusted. (See 3-107