CALIBRATION PUMP INSTALLED

TM-5-3805-260-24 Scraper Tractor: Elevating Self-Propelled 11 Cubic Yard Sectionalized and Nonsectionalized Manual
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TM 5-3805-260-24 NOTE: When sleeve is installed on pump plunger, the narrower of the two lands on the sleeve must be toward top of pump (nearest the pump spring). 8 Clean the barrel and plunger of calibration pump (1). Put clean diesel fuel on the calibration pump fox lubrication. NOTE: Be sure that the spring on calibration pump (1) is the 5P6557 Spring instead of the 1 P7377 Spring which was installed on earlier calibration pumps. INSTALLING CALIBRATION PUMP 1. 3P1540 Calibration Pump. 9. Put calibration pump (1) in the place of the pump to be checked with the flat place (20) on the plunger toward tang (17) on lever (18). When the calibration pump (1) is all the way in the bore, turn it 180° in either clockwise or counterclockwise direction. Tang (17) on lever (18) is now in groove (19) of calibration pump (1). Then install 4N218 Bushing (2) use the 8S2243 Wrench and a torque to tighten the bushing to 60 + 5 lb. ft. (80 + 7 Nm). NOTE: Turning calibration pump (1) 1800 gives the same reference point for all measurements. CALIBRATION PUMP INSTALLED 1. 3P1540Calibration Pump. 17. Tang on lever. 18. Lever. 19. Groove of calibration pump. 20. Flat on plunger. NOTE: Use 4N218 Bushing (2) and calibration pump (1) together. The contact surfaces of the standard bushing, fuel injection pump and the housing for the fuel injection pumps are sealing surfaces. Keep them clean and free of scratches, to prevent leaks. PUTTING DIAL INDICATOR ON ZERO 3. Microgage. 4. 3P1568 Dial Indicator with 3P2226 Collet. 21. Lockscrew. 22. Locknut. 23.3P2226 Collet. 10. Put dial indicator (4) on microgage (3) and hold them together tightly. Loosen lockscrew (21) and turn the face of dial indicator (4) to put the pointer at "0". Tighten lockscrew (21). Remove dial indicator (4) from microgage (3). Look at the face of dial indicator (4) and put dial indicator (4) on microgage (3) again. The pointer must move through one to one and one half revolutions before stopping at exactly "0". If the number of revolutions is not correct, loosen the locknut on 3P2226 Collet (23), and adjust the position of the dial indicator until the adjustment is correct do Step 11. 2-60

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