ASURING & ADJUSTING PRESSURES 8. Start engir ,~edfy the engine RPM’sare within spec : anges. 9. Performthe ;: 7~-}arypressuretests andadjustmentsin the ~derthey are listed below. a. MainPilot Relief Pressure. b. Travel MainRelief Pressures. c. Attachment MainRelief Pressuresin "HEAVYLIFT" ON. d. Attachment MainRelief Pressuresin normal modewith "HEAVY LIFT" OFF. e, SwingPort Relief Pressures Pressure 10. Perform the following OPTIONAL Testsas required.(Notnecessarilyas listed). a. Attachment CylinderPort Relief Pressures. b. LowPressureRelief Valve Pressures. c, NegativeControl Pressures. d. PowerShift (Pf) Pressures D. MainandPort Relief PressuresMeasurement and AdjustmentNotes 1. If pressuregaugereadingsare within specificationsfor the particular machine beingtested, it is not necessary to adjust Relief ValvePressures. 2. During adjustmentof the two stage attachment mainrelief valves for P1andP2 pumps,perform measurement and adjustmentof the boost (heavylift) stageof themainrelief valvesfirst. Then, completethe normalmainattachment relief pressuremeasurement andadjustment. SeeFigures2.15A& 2.18Afor "HeavyLift" and "Normal"adjustmentscrewsand Iocknut~ 3. Measurement and adjustmentof attachment cylinder port relief valvesare not necessary during normal pressure measurement’procedures. If measurement and adjustmentof an attachment port relief valveis required,it may be necessaryto increasethe openingpressuresof the attachment mainrelief valvesand possiblythe travel mainrelief valves. Mark themaccordinglyfor easeof readjustment. 4. Install propersize pressuregaugesat correct locations, 5. Confirmthat enginerpm’sare within specifications. 6.Confirmthat enginecoolantandhydraulicoil are at normaloperating temperatures. 7. Performall testing and adjustmentprocedures observingall applicablesafety requirements. 8. Performance Inspection StandardCharts are on Pages2-15 through2-22 and are organized by ModelNumber. Page 5-2
9. Recordall Gauge readingsand compare to that particular machine’sc~hart BEFORE makingany adjustments. 10. All PressureTests are conducted with machine in "H" Mode and enginein "HI-IDLE," unless otherwisespecified in test procedure. NOTE Whenadjusting, pressuresare increased and decreased as follows: CLOCKWISE ROTATION-Increase COUNTERCLOCKWISE ROTATION-Decrease E. VERIFYINGENGINERPM- SK150 - SK460 1. Start Engine. 2. Depressthe BuzzerStop Switch 5 Times.This will changethe Gauge Cluster Display from Clock to EngineRPM.SeeFigure A. BUZZER STOP SWITCH
FIGUREA NOTE The WarningBuzzersoundswhile the Engine’s RPMis being displayedto avoid the RPM display being left on duringnormalmachineoperationandaffect the other system displays andwarnings. 3. To retumGauge Cluster Displaybackto normal, depressthe buzzerstop switch onetime. NOTE TheEngineRPM Display can be broughtbackat any time by depressingthe BuzzerStop Switchone time. If the poweris turned"OFF",it will be necessary to repeat stepsI and 2 to get the EngineRPM on the display. display show"0"while 4. Shouldthe EngineRPM the engineis running, checkand correct the following areas: a. RPMSensor Adjustment b. RPMSensorResistance Value c. Electrical Harnessand Connections F. VERIFYINGENGINERPM-SK100~ SK130 Install anexternal Tachometer to enginein order to verify engineRPM. S/Orem-05-99
