TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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) LEGEND r fig. 3. l Fuel preure indicator gage 2 Oil pressure indicator �ag 8 Elcctroni counter switch 4 Electronic counter 5 }\Jse 6 Reset button 7 M+gnctic pickup cablo 8 Oil temperature dial thermometer 9 Electronic tachometer 10 Speed regulator control 11 Jog run switch (clutch engag) 12 Stop switch (clutch disengage) 19 Power indicator light 14 ain tank 15 Motor switch 16 Heat indicator light 17 Fuel Injector advan s embly 18 Oil heater switch 19 Oil drain push switch 4 Master switch (6) Turn lhe electronic counter switch, (3), "ON". The electronic comnents in the counter will reach operating temperature by the time the test is begun. (7) osen fasteners and remove fuel injection pump drive housing cover from top of tt stand. &move the two bearing caps (fig. 3-91) and intermedi- ate bearing support from the mounting fixture. "'"" JW. >;,.1 '' """'" P�"'P od�"" -mbly mowt ' po1t1U. �' (8) Install retaining rin n test stand oil retai · g shaft. or stu end of oil retainin in driven (small) end of the advance assembly. Install sup- port over bearing on large gear end of advance assem- bly and install advance assembly in bearing supports of mounting fixture and secure with hardware removed above. Install drive housing cover and secure with fasteners. TM 9-2815-220-34 CAUTION The fuel injection pump advance assembly drive housing cover must always be in- stalled and secured before operating test stand. (8.1) Tu motor swilch (l 5, fig. 3-250) � "ON". 9 (9) Push j run (clutch engage) switch to engage dy current clutch and turn sp regulator control to obtain advance assembly speed of 8 rpm on tachometer. Turn speed regulator control clkwise to increase rpm. (10) Observe oil and fuel prsure indicator gages (1 and 2, fig. 3-Ą). These gag should register more than zero (0); however, maximum pressures will not be evident until a sפed of rpm is obtained. CAUTION Turn master switch handle "OFF" if the is no indication of oil or fuel prsure on the gag. Investigate and correct the deficien- cy before starting the tt. (11) Operate test stand at >0 rpm until the oil tem- פrature dial thermometer (8) stabiliz at200degrees. It may ruire several minutes to warm the entire system to operating temperature. Note and record electronic counter (4) reading (illuminated decimal digits on the front of the counter panel). (12) Press oil drain push switch, lated im- mediately below the oil pressure indicator gage. The gage should register zero (0) psi with the switch depressed. Observe the counter reading. If the counter has changed more than one (1) degree, the advance as- sembly requir adjustment. (13) Release oil prsure drain switch. Turn speed regulator control (10) clockwise to increase the speed to <0 rpm. Note and record the counter reading at each 40 rpm increment Increase, beginning at <0 rpm and continue through to � rpm. (14) Ruce sp <0 rpm and rechk counter reading. If this reading dœs not check with the original reading repeat the tt. Check the readings taken at each 40 rpm inc against similar points on the ap- proved advance unit curve (fig. ?2). If the recorded advance readin fall within the prcribed limits on the curve, the test is complete. If the advance readings do not mt the curve limits, preed wi th sp (17) low. Change 3 3-151