TM 5-6115-584-34NAVFAC P-8-622-34TO-35C2-3-456-2(14) Refer to paragraph 7-7 and install blower wheel.(15) Refer to paragraph 7-9 and install cylinderheads.(16) Refer to Operator and Organizational Mainte-nance Manual and install blower housing.7-18. FUELINJECTIONPUMP.a. Removal (see figure 7-32).(1) Snap off governor linkage from injection pump(1), and governor control arm and remove linkage.(2) Refer to paragraph 7-2 and disconnect inlet andfuel return lines from pump. Tag and disconnect high pres-sure lines at injector nozzle end at injector pump. NOTEAll fuel connections must be plugged or cappedto prevent contamination.Figure 7-32. Injection Pump(3) Remove four hexagon nuts (2, figure 7-32). lock-washers (3), and flatwashers (4) holding pump (1) tocrankcase and lift pump off crankcase. Be careful to retainthe shims (5) between the crankcase and pump. The correctthickness of shims as stamped on the crankcase is importantto proper pump operation; it provides the proper gear lash.This thickness does not change when a new pump isinstalled. It changes only when a new cylinder block isinstalled. To calculate new shim thickness, measure betweencamshaft and engine block pump mounting surface. Sub-tract that measurement from 1.171 inches. This will be theshim thickness. Refer to fig. 7-33A. Use Gage, Depth,Micrometer NSN5210-00-542-4602 for this measurement.(4) When removing a pump for replacement, recordthe button thickness and port closing dimensions as stampedon the side of the pump mounting flange (figure 7- 33). Thesevalues are important in timing a new pump to the engine.b. Disassembly (see figure 7-34). All work on injectionequipment MUST be performed in the cleanest locationpossible. No filing, scraping or sawing should be dories onthe bench where repairs are made.(1) Clean all external dirt and grease from thepump.The Pump Housing Must NEVER Be Clampedin a Vise.NOTEA special mounting fixture (see table 2-2) mustbe made to adequately secure the pump housing.(2) Clamp the mounting fixture in a suitable vise.(3) Install the pump into the mounting fixture, withtwo 0.3125”-18 UNC-HEX head screws.(4) Release lock tabs (2) and remove the two controlunit retaining plate screws (1) and tab washers (2, figure7-34) and the control unit retaining plate and stop assembly(3). Carefully pull the control unit assembly (4) with plungersleeve pin (5) out of the pump housing (6). Plunger sleeve pinoccasionally may have to be removed separately. Use needlenose pliers or magnetic pencil.(5) Remove the delivery valve cap nut (7) and gas-ket (8).(6) Remove the delivery valve holder (9) then liftout the delivery valve spring ( 10), delivery valve assembly(11) and delivery valve spacer ( 12).7 - 3 0Change 7
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