Nilfisk-Advance 56413006, Service Manual

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FORM NO. 56043122 - BR 1100S, 1300S - 43
WHEEL DRIVE SYSTEM - 6
ELECTRIC DRIVE MOTOR REMOVAL
1 Follow steps 1-7of the Steering Spindle and Wheel Drive Assembly Removal section.
2 See Figure 6.3. Remove the (12) (I) socket headed cap screws (2 long & 10 short) that fasten the gear case cover (J) to the large gear housing (H) (use a
3/16” hex driver socket). Then separate (pry) the cover from the housing by tapping on the 3 casting ear corners located on the cover.
3 The (K) small motor gear must be removed next. Use an external snap ring pliers to remove the retainer ring (L) then pull the gear from the end of the motor
shaft.
4 With the motor gear removed the complete motor assembly can now be separated from the gear housing.
5 Reassemble in reverse order and torque the (12) gear case cover screws (I) to 10 ft/lbs (13 Nm).
CARBON MOTOR BRUSH INSPECTION AND REPLACEMENT
WARNING!
Turn the key switch (A) to the OFF position and disconnect the battery pack by pushing in the emergency disconnect red lever (11) .
Next set machine parking brake (6) and block both rear wheels so machine can’t roll.
1 To inspect the carbon brushes (Qty 4) for brush wear and length, remove the socket head cap Screw (M) shown in Figure 6.3 (using a 1/8” hex wrench) then
separate the metal Inspection Band (N) from the motor end bell.
2 Service Tip: Bend a sharp loop to the end of a stiff piece of wire to fabricate a tool to pull on the end of the carbon brush springtail to easily help apply or remove
the spring tension on the end of a carbon brush.
3 Remove the spring tension on the end of each brush using the above mentioned tool and then pull the brush from the holder to examine and measure. Note: A
new brush measures 1 inch (25.4 mm) in length if less than 3/8 inch (10 mm) length replace. Each brush has a wire end secured to the brush ring with a small
hex screw (use a 5/16” socket to remove screw).
FIGURE 6.4