Danfoss 51 Series Service Manual

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Danfoss 51 Series Service Manual Manual pdf 33 page image

3. After adjusting the plug, torque the locknut to 52 N•m [38 lbf•ft]. Do not overtorque4. Remove the gauges.5. Reinstall the port plugs.Motors with loop flushing defeated, or equipped with an orificed charge pressure relief valve (seeCharge relief valve on page 44) do not require adjustment.Series 51-1 charge pressure relief valve11/16 inchAdjustment plug52 Nm [38 lbf•ft]Minimum displacement limiterW WarningAdjustment of the minimum displacement limiter can result in undesirable or unsafe speed conditions.Consult with the Original Equipment Manufacturer or your Danfoss representative before changing theminimum displacement setting. After adjustment, verify minimum displacement setting by using anappropriate test apparatus.The factory sets minimum displacement. A tamper-resistant cap covers the adjustment screw.C CautionTo avoid unexpected changes in operating conditions and to prevent external leakage, torque the locknut (Y20) after every adjustment.Detect changes in motor displacement by providing a constant flow of fluid to the motor, whilemaintaining the motor at minimum displacement and monitoring the motor output shaft speed. Anincrease in displacement will result in a decrease in shaft speed, while a decrease in displacement willresult in an increase in shaft speed.Adjusting minimum displacement1. Remove the tamper resistant cap (Q120) from the adjusting screw (Y10). Removing the tamperresistant cap destroys the locking device.Service ManualSeries 51 and 51-1 MotorsAdjustments© Danfoss | March 2016 11008567 | AX00000013en-US0202 | 33