Nilfisk-Advance BA 625, Service Manual

Page: 54 / 79

52 - FORM NO. 56043098 - Convertamatic
™
24, 26, 28, 32 / BA 625, 725, 825
ELECTRICAL SYSTEM
ACTUATOR DRIVE NUT ADJUSTMENT
This manual section explains the steps for adjusting the drive nut (spring housing) setting for all the models’ scrub brush lift actuator motor. Reference the chart below
to
fi nd the IN & OUT dimensional speci fi cation for an actuator motor needing adjustment.
Part # Actuator Motor Spring Housing IN Position Spring Housing OUT Position Models
56393303 Scrub Brush Lift (ALL) 1/16”(1.6mm) - 3/16”(4.76mm) 4-1/8”(10.47cm) - 4-1/4”(10.8cm) ALL
*The “Spring Housing IN/OUT Position” dimensions are measured when completely assembled. Reference points are the gear box step to the edge of the plastic
Spring Housing Guide
(A) as shown in Figures 3 and 4.
**Model designation: All Convertamatic™ models
General Instructions for All Actuator Motors
1 See Figure 2. This shows the special actuator power cord adapter
(PN 56407502) that is needed to connect the machine’s battery
pack and actuator motor for setting the drive nut limit settings.
2 Open the machine battery compartment and disconnect the
battery connector. The battery pack is needed to power the lift
actuator motor to properly set the IN & OUT limit switches.
3 Connect the actuator motor to be tested to the power cord adapter
end. Then connect the alligator clips from the cord adapter (red
clip to the positive and black to negative) to battery connector
or battery posts. The rocker switch is used to change the motor
rotation in setting the correct drive nut dimension.
Instructions for Scrub Brush Lift Actuator Drive Nut Adjustment
1 See Figure 3 and 4. On a new scrub lift actuator motor remove (spin-off) the Drive Nut (B) and fi rst slide on the Spring Housing Guide (A) , then install the short
compression Spring (C) onto the actuator (lead screw) shaft. Next reinstall the plastic Drive Nut (B) as shown (with the nut pin pocket away from the motor).
Then fi nish assembly of remaining parts (long compression spring, Spring Housing (D) and mounting hardware).
2 Hold onto the spring housing assembly and press the rocker switch to run the drive motor and retract the spring housing towards the motor housing (its IN
limit).
3 Measure the position of the spring housing assembly on the actuator shaft. Manually turn the spring housing assembly to the appropriate IN position shown in
the chart above.
4 Hold the spring housing assembly, then press the adapter cord rocker switch to run the drive motor to the OUT position (wait until the motor stops).
5 Measure the position of the spring housing assembly on the shaft and compare the measurement with the OUT position shown in the chart.
6 When the measurement doesn’t match the dimension shown in the chart it is necessary to remove the Adjuster Cover (E) and adjust the OUT position.
FIGURE 2
FIGURE 3
7 To increase the travel of the spring housing assembly,
turn the adjuster clockwise. To decrease the travel of the
assembly, turn the adjuster counter clockwise.
NOTE: Use a 1/2” (13mm) socket to turn the adjuster.
Each click of the adjuster will change the spring housing
assembly travel 1/16 inch (1.6mm).
8 After each adjustment, hold the spring housing assembly,
run the actuator IN & OUT and check both dimensions.
After checking that the spring housing limits are set
correctly replace the adjuster cover. Service Tip Note:
Use the above power cord adapter to help position the
spring housing assembly (in or out) for ease in actuator
motor installations.
9 After adjusting the actuator spring housing dimensions,
follow the
Scrub Brush Lift Actuator Removal (Disc or
Cylindrical) manual section to reassemble.
Service Tip: See Figure 4. Note the correct orientation of
the Spring Housing (D) when installing the complete motor
assembly and also run the spring housing assembly to the IN
(retracted) position for machine installation.
revised 8/05