TM5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-2Figure 13-18. Spray Angle Tester(2) Attach drain hose to spray angle tester baseand place loose end in injector test standdrain pan.(3) Assemble cup seat spacer H-10 to seatbracket bore.(4) Place H-2 seat in seat spacer and bracketbore.(5) Place target ring in base of spray angletester.i.Installation, Assembly, and OperatingInstructions for the Injector Test Stand . Theinjector test stand must be located near hot and coldwater connections. Water temperature, controlled bya mixing valve, is used to maintain test oil at a 90 to95°F (32 to 35°) temperature range. If temperatureexceeds 135°F 57°C) drain and replace with newtest oil. (See figure 13-19.)(1) Fill test oil tank 3/4 full of test oil andmaintain this level or higher during test. Test oilcapacity is approximately 5 gallons. It is availableas Part No.99011-68.(2) Fill the hydraulic fluid reservoir to half levelin sight bulb with clean Type A automatictransmission fluid. Be careful not to allowoil to enter the standpipe in center ofreservoir.(3) Fill cambox with SAE 30 non detergentlubricating oil to top of sight glass. Refillwhen oil level gets low in sight glass.(4) Plug electrical connection into receptaclecarrying the necessary voltage to operatethe test stand.(5) A motor driven shaft and cam are housed inthe cambox. The cam actuates the verticalpush rod at the bottom of the housing.(6) The push rod is connected to the injector bya link so the injector plunger will be actuatedby cam action just as it is in the engine.(7) Injectors are clamped in the test stand byhydraulic pressure from the cylinder, pistonrod, and injector seat. The injector seatcontains a removable orifice to restrict themetered fuel flow and cause a backpressure simulating compression pressuresas found in the engine.(8) Before clamping the injector in the teststand, the cam must be timed by rotatingthe timing wheel so the wheel mark andpointer are aligned.(9) Shop air pressure regulated by air regulatoris used to apply a balanced force on thehydraulic system. The air gauge at top ofhydraulic reservoir is used as a referenceindicating that pressure has not changed.(10)When the air valve is opened, airtravels up the pipe in the center of the tubetype hydraulic reservoir and exerts adownward pressure against the column ofhydraulic fluid.(11)When both the air valve and thehydraulic valve are opened, hydraulic fluidis admitted under the piston in the cylinderand lifts the injector into clamped13-36
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