Scrub Brush Deck Removal (Cylindrical); Scrub Brush Motor(S) Removal (Cylindrical); Scrub Brush Belt Replacement (Cylindrical); Scrub Brush System Maintenance (Cylindrical) - Nilfisk-Advance 56315036(28D) Service Manual

SCRUB SYSTEM

SCRUB BRUSH DECK REMOVAL (CYLINDRICAL)

1 Lower the scrub deck with brushes installed. Turn the key switch off and disconnect the battery pack.
2 Lift up and remove cover and nose cone, from front of machine.
3 See Figure 4. Disconnect the Solution Hose (O) from the scrub deck.
4 Unplug both brush motors wire assembles. Note: cable ties may need to be cut.
5 Remove the lower Actuator Mount Pin (P). NOTE: Lift up on the actuator spring housing to take pressure off the Pin (P). Service Note: It is important that the
actuator motor is not run while it is disconnected from the deck or chassis mounts. This precaution will prevent the actuator drive nut from being misadjusted
(moved out of its set specifi cation).
6 Remove the Cotter Pin (Q) and washers that attaches the Upper Hitch Pin (R) to the machine chassis Linkage Arm (S).
7 Remove the two (T) Hitch Pins that attach the scrub deck to the machine's chassis Linkage Arms (U). Then rotate the Arms (U) out of the way.
8 From the front of the machine swing the lower actuator housing forward to clear the deck mount bracket (remove the actuator on AXP™ / ECO+Solution™
models). Then slide the deck towards the left side of the machine until Pin (R) is clear of Arm (S). Pull the deck forward away from the machine to complete the
removal. SERVICE NOTE: It is important that the actuator motor is not run while it is disconnected from the deck or chassis mounts. This precaution
will prevent the actuator drive nut from being misadjusted (moved out of its set specifi cation).
9 To reinstall a scrub deck, follow the above steps in reverse order.

SCRUB BRUSH MOTOR(S) REMOVAL (CYLINDRICAL)

1 Follow the steps in the Scrub Brush Deck Removal (Cyl.) section.
2 Remove the Belt Guard(s) (V) held in place by (1) screw.
3 Disconnect the defective motor wiring plugs.
4 Remove the 3 (W) Screws and slide the motor out. Note: The belt can be removed at this time.
5 Reassemble in reverse order. Note: The belts are self tensioning no adjustment is needed.

SCRUB BRUSH BELT REPLACEMENT (CYLINDRICAL)

1 Remove the Belt Guard(s) (V) held in place by (1) screw.
2 Carefully roll the belt off the top Motor Pulley (X).
3 Reinstall the belt by placing it on the top Motor Pulley (X) and carefully roll it onto the Lower Brush Pulley (Y). NOTE: Be sure the belt grooves and pulley
grooves match up (Aligned).

SCRUB BRUSH SYSTEM MAINTENANCE (CYLINDRICAL)

The scrubbing system must be serviced at regular intervals to maintain good scrubbing performance. Follow the maintenance steps listed below.
1 Rinse clean, built up debris from the debris hopper drain holes (daily).
2 Clean drain holes in the solution delivery trough on top of the scrub deck (weekly).
3 Clean built up dirt from the inside of the scrub brush housing (weekly).
4 Remove any string wrapped around the scrub brush, drive hub and idler hub (weekly).
5 Remove both the scrub brushes and rotate, turn end for end (weekly). See Scrub Brush Removal and Installation (Cyl) section.
6 Inspect the scrub brush bristles for wear, the brushes should be replaced when the bristle length is 1 inch (26mm) or less (monthly).

SCRUB BRUSH REMOVAL AND INSTALLATION (CYLINDRICAL)

1 Make sure the key switch is off and disconnect the battery pack before servicing.
2 Loosen the black knobs (one on each side) that secure the removable bearing idler support Plate (Z) to the brush housing, then pull the plates down and out
to remove. Grip the scrub brush and slide it from the housing end.
3 To install the brush slide it into the housing, lift slightly, push and turn until it seats into the drive end assembly.
4 Re-install the idler end plate assemblies.

SCRUB BRUSH LIFT ACTUATOR REMOVAL (CYLINDRICAL)

1 With scrub brushes installed lower the scrub deck, turn the key off and disconnect the battery pack. Note: If the lift actuator motor will not run go to step 2 and
perform the following, shim up the brush deck to remove the weight on the lower deck Actuator Pin (P) to remove.
2 Remove the front nose cone by fi rmly grasping the lower part and lifting straight up.
3 Disconnect the actuator motor wiring harness pig tail connector.
4 Remove the lower actuator mount pin (P). Lift up on the actuator spring housing to take pressure off the Pin (P).
5 Remove the Pin (AA) from the upper actuator mount weldment and remove the motor.
6 See *Important Service Note below.
7 Reinstall in reverse order.
*Important Service Note: After removing any actuator motor and before installing a new motor or drive nut the IN and OUT limit switches must be set (or checked)
to their correct specifi cations. Reference the Electrical System in this manual for the Actuator Drive Nut Adjustment and follow these instructions before replacing
the actuator motor.
After setting the correct actuator nut adjustments for the scrub brush lift motor, follow removal steps in reverse order to reassemble.
28 - FORM NO. 56043103 - Warrior ST, Warrior AXP / BA 755 series
™ ™