Nilfisk-Advance BR 850S Service Manual

Contents

52 - FORM NO. 56043097 / Adgressor ™ / BR 850S, 850CS, 950S, 950CS, 1050S, 1050CSELECTRICAL SYSTEMACTUATOR DRIVE NUT ADJUSTMENTThis manual section explains the steps for adjusting the drive nut (housing assembly) setting for the machine’s two actuator motors. Reference thechart below to find the IN & OUT dimensional specification for the specific actuator motor needing adjustment.Part # Actuator Motor Drive Nut Housing Assy IN Drive Nut Housing Assy OUT56393303 Scrub Brush Lift (disc & cyl.) 3/8” (9mm)* 3-5/8” (92mm)*56397230 Squeegee Lift 3/32” (2mm)* 3-3/8” (86mm)**The “Drive Nut Housing Assy IN/OUT Position” dimensions are measured when completely assembled. Reference points are the gear box step to the edge of theSteel Tube (A) as shown in Figure 3, or the edge of the plastic Spring Housing Assembly as shown in Figure 4.**Flush even to end of step.General Instructions for All Actuator Motors1 See Figure 2. This shows the special actuatorpower cord adapter (PN 56407502) that is neededto connect the machine’s battery pack and actuatormotor for setting the drive nut limit settings.2 Open the machine battery compartment anddisconnect the battery connector. The battery packis needed to power the lift actuator motor to properlyset the IN & OUT limit switches.3 Connect the actuator motor to be tested to thepower cord adapter end. Then connect the alligatorclips from the cord adapter (red clip to the positiveand black to negative) to battery connector orbattery posts. The rocker switch is used to changethe motor rotation in setting the correct drive nutdimension.Instructions for Squeegee Lift Actuator Drive Nut Adjustment1 See Figure 3. Hold onto the Actuator Drive Nut (A) and press the rocker switch to run the drive motor and retract the nut towards the motorhousing (it’s IN limit).2 Measure the position of the drive nut on the actuator shaft. Manually turn the steel tube to the IN position as shown in the chart.3 Hold the drive nut then press the adapter cord rocker switch to run the drive motor to the OUT position (wait until the motor stops).4 Measure the position of the drive nut on the shaft and compare the measurement with the OUT position shown in the chart.5 When the measurement doesn’t match the dimension shown in the chart it is necessary to remove the Adjuster Cover (B) and adjust the Outposition.6 To increase the travel of the drive nut, turn the adjuster clockwise. To decrease the travel of the nut, turn the adjuster counter clockwise.NOTE: Use a 1/2” (13 mm) socket to turn the adjuster. Each click of the adjuster will change the nut travel 1/16 inch (1.6 mm).7 After each adjustment, hold the drive nut, run the actuator IN & OUT and check both dimensions. After checking that the drive nut limits areset correctly then replace the adjuster cover. Service Tip Note: Use the above power cord adapter to help position the drive nut (in or out) forease in actuator motor installations.FIGURE 2FIGURE 33/32"(2mm)A3-3/8"(86mm)BINOUT