Nilfisk-Advance 56397010 Service Manual

FORM NO. 56043056 ConvertaMAX™ 20/26 / BA 550/650 - 45WHEEL DRIVE SYSTEMGRN WHT BRN1High 3Low2WiperPOTENTIOMETER INSTALLATION AND ADJUSTMENT (FOR MACHINES BUILT BEFORE DEC. 1,2000)WARNING!The adjustment of the potentiometer is to set the drive paddle for a neutral drive motor operation. If the potentiometer is not adjustedproperly, the machine could move either FWD or REV with no operator control.1 See Figure 7. Install the pot into the handle mount hole, then place the washer and anchor nut just threaded a few turns onto the shaft end.2 Using an ohmmeter connect leads to the middle terminal (2 wiper) and the (3 low pot) outside terminal. Then pre-set, turn the shaft to approximately 2300ohms.3 Observe the molded rib inside the Fork (Q) position it to align with the slot on the end of the pot shaft, then assemble together and tighten the (P) Screw.4 Then without turning the pot shaft thread the anchor nut to seat the pot to its mount bracket.5 Reconnect the ohmmeter test leads to the pot wiper and low terminal connections and adjust (turn the pot) to obtain half of pots total resistance. This willaccurately set the true neutral drive paddle operator position.6 Tighten the anchor nut secure. Note: Do not turn the potentiometer shaft when tightening. Reconnect the battery cable and turn the key switch on andtest the drive system for proper FWD and REV operations. Note: The dash panel maximum speed control knob should be turned to the full speed positionfor testing.revised 7/02FIGURE 6PFRONTQORibSlotFIGURE 7