Service and Repair Manual June 2017Hydraulic Pumps94 SX-180 Part No. 1268497Pressure reads more than 350 psi / 25 bar8 Loosen the set screw for the standby pressureadjustment screw on the rear function pump.Turn the adjustment screw counterclockwise(lower pressure) and note if the pressuredrops. If so turn the adjust screwcounterclockwise (higher pressure) until thepressure reads 350 psi / 25 bar. If thepressure does not drop, turn the screw slightlycounterclockwise to lower the pressure andproceed to step 7.9 Loosen the set screw for the standby pressureadjustment screw on the mid function pump.Turn the adjustment screw counterclockwiseuntil the pressure reads 350 psi / 25 bar.Tighten the set screw. Proceed to step 8.10 Turn the adjustment screw on the rear functionpump clockwise until the pressure readsgreater than 350 psi / 25 bar, then turn thescrew counterclockwise until the gauge reads350 psi / 25 bar. Tighten the adjustmentscrew.11 Turn the engine off and remove the pressuregauge.How to Adj ust the Functi on Pum p Press ure Com pens atorHow to Adjust the Function PumpPressure CompensatorNote: Two people will be required to perform thisprocedure.1 Confirm the system relief pressure is set tospecification. Refer to Repair Procedure,Valve Adjustments - Function Manifold.2 Connect a 0 to 5000 psi / 0 to 350 barpressure gauge to the test port on the functionmanifold3 Start the engine from the ground controls andchange the rpm to high idle.4 Push and hold the high speed function enablebutton (rabbit symbol). Do not activate anyboom functions.5 Locate the function enable solenoids belowthe function pumps on the engine tray.Disconnect the wire connector from the insidesolenoid and observe the pressure reading onthe pressure gauge.Result: The gauge should show 2900 psi /200 bar on the end pump.Result: If the gauge does not show 2900 psi /200 bar, proceed to step 7 to adjust thefunction pump pressure compensator.6 Reconnect the wire connector to the insidesolenoid and disconnect the wire connectorfrom the outer solenoid.Result: The gauge should show 2700 psi /186 bar on the middle pump.Result: If the gauge does not show 2700 psi /186 bar, proceed to step 7 to adjust thefunction pump pressure compensator.
