Wacker Neuson G 2.1A Repair Manual

Wacker Neuson G 2.1A Repair Manual Manual pdf 19 page image

4A-550 HZ PORTABLE GENERATORS G2.1A/G2.1AE 4A4.10 Loss of Residual Magnetism in RotorContact with exposed connections inside the controlbox or while handling battery leads can cause se-vere electrical shocks. Be extremely careful to avoidtouching any exposed connections. Never wearjewelry or use tools or metal items that may makecontact across exposed connections. Review safetyrules at beginning of this manual.WARNINGFigure 4-6. “Flashing” the RotorTo restore magnetism to the rotor, “flash” it as follows:1. Remove the two screws and the end cover. Locate thecapacitor that is attached to the stator housing.2. Run generator at normal no-load speed – 3100 rpm,auto-idle off.3. Briefly touch a 12 VDC battery across the two capacitorconnections to pulse the auxiliary winding. The leadsshould remain attached to capacitor. The polarity ofthe battery leads is not important.CAUTION: DO NOT hold battery leads on connectionlonger than two seconds.The output voltage should quickly come up to normallevels. Repeat if necessary. See Figure 4-6.4. Stop engine and replace end cover.1023SD45CapacitorStator Hous-ing12 VDCBatteryIf the rotor has been removed, or the generator has beenstored over six months, the rotor’s magnetism may belost. Loss of magnetism will prevent the generator frombuilding voltage.