7 - 6 Genie S-60 & Genie S-65 Part No. 48412Service Manual - Second EditionSection 7 - Repair ProceduresPLATFORM CONTROLS8 Set the dual (lo) range: Press down the footswitch, then move the control handle all the wayto the RETRACT position. Adjust the voltageto 9.2V DC. Turn the dual range trimpotadjustment screw clockwise to increase thevoltage or counterclockwise to decreasethe voltage.9 Start the engine and move the engine idlecontrol switch to foot switch activated highidle (rabbit and foot switch symbol). Lowerthe boom to the stowed position.Engine should be at normaloperating temperature.10 Start a timer and record how long it takes forthe boom to fully extend. Adjust themax-out trimpot to achieve a 60 to 80 secondcycle time.11 Start a timer and record how long it takes forthe boom to fully retract. Adjust the dual rangetrimpot to achieve an 55 to 85 second cycletime.If the function cycle time is notachievable, check the relief valvepressure. See 10-2, ValveAdjustments - Function Manifold.12 Turn the engine off and re-connect thevolt meter.13 Pull out the Emergency Stop button tothe ON position.14 Press down the foot switch and then move thecontrol handle all the way to the EXTEND position.Record the maximum voltage reading.15 Start the engine.16 Start a timer and simultaneously move thecontrol handle all the way to the EXTEND position.Note how long it takes to reach the maximumvoltage recorded in step 14. This is the rampspeed.17 Set the ramp rate: turn the trimpot to obtaina 3 second ramp speed. Turn thetrimpot clockwise to increase the time orcounterclockwise to decrease the time.Boom extend/retract specificationsThreshold 3.5V DCBoom extend - Max-out 9.75V DCCycle time 60 to 80 secondsBoom retract - Dual (lo) range 9.2V DCCycle time 55 to 85 secondsRamp rate 3 seconds1-2Horsepower Limiter BoardThe horsepower limiter board is responsible forgoverning drive pump output. It senses engine rpmfrom the alternator. The horsepower limiter boardsenses drops in rpm normally due to increaseddrive resistance (rough terrain or incline), anddecreases voltage to the drive controller which inturn decreases voltage to the drive pump, therebyreducing pump output to maintain optimum enginerpm and horsepower. Three adjustments arerequired for optimum performance.How to Adjust the HorsepowerLimiter BoardThe engine rpm must becorrect before performing thisprocedure. See MaintenanceProcedure B-12, Check andAdjust the Engine RPM.Do not adjust the horsepowerlimiter board unless the staticbattery voltage is above 12V DCand the alternator is operatingproperly with 12.5 to 14.5V DCoutput.Gasoline/LPG models: Performthis procedure in gasoline mode.800-610-4101ActionRental.com
