Service and Repair Manual December 2023Manifolds94 GS™-3390 • GS™-4390 • GS™-5390 Part No. 1325652GT7-9Valve Adjustments - GeneratorManifoldHow to Adj ust the Generator VoltageHow to Adjust the GeneratorVoltageBodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil tosquirt or spray.Electrocution/burn hazard.Contact with electrically chargedcircuits could result in death orserious injury. Remove all rings,watches and other jewelry.Note: Be sure that the hydraulic oil level isbetween the full and add marks on the oil levelindicator.1 Disconnect all electrical tools from themachine.2 Start the engine from the platform controls.3 Press the generator select switch.Result: The generator should activate and theengine should go to high rpm.4 Connect an electrical tool, which does notdraw more than 15A, to the electrical outlet atthe platform controls and run the tool at fullspeed.5 Connect the positive and negative leads froma multimeter of sufficient capacity to theelectrical outlet at the generator.Result: The reading on the multimeter shouldbe 112 to 118V AC.Result: If the reading on the multimeter is not112 to 118V AC, proceed to step 6.6 Turn the key switch to the off position.7 Use a wrench to hold the generator flowregulator valve (item AM) and remove thecap.8 Adjust the internal hex socket. Turn itclockwise to increase the AC voltage orcounterclockwise to decrease the AC voltage.Install the flow regulator valve cap.Component damage hazard.Failure to adjust the generatoras instructed may result indamage to the generator orother electrical equipment. Donot adjust the generator to otherthan specified.9 Repeat steps 2 through 5 to confirm thegenerator AC voltage.