Tennant 7400, Service Manual

Page: 52 / 322

SCRUBBING
3-16
7400 MM428 (12--98)
TO REPLACE MAIN BRUSH IDLER SHAFT
BEARINGS
1. Place the main scrub brushes in the raised
position.
FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, Turn Off
Machine And Remove Key.
2. Open the RH brush door.
3. Pull back on the front ball joint locking collar.
Remove the leveling rod from the front ball
stud.
4. Remove the two hair pins from the brush
wrap attachment pins.
5. Remove the M12 hex screw holding the
brush idler plate arm to the lift tube.
6. Remove the idler plate and side squeegee
assembly from the machine.
NOTE: For better access to the shaft and
bearings----remove the C--clip and brush arm from
the idler plate.
7. Turn the idler plate and side squeegee
assembly over. Remove the cotter pins,
castle nuts, and washers from the idler
plugs.
8. Use a puller to remove the idler plugs from
the tapered shafts. Remove and retain the
square key.
9. Remove the retaining rings from both ends
of the idler shafts.
10. Use a press to remove the tapered shafts
from the idler plate. Push the shafts out
toward the direction of the idler plugs.
NOTE: Use a small amount of heat in the area of
the bearings to help break the loctite loose.
11. Use a press to remove the bearing from the
tapered end of the idler shaft.
12. Use a press to remove the bearing from the
bearing housing in the idler plate. Discard
the old bearings.
13. Use a press to install a new bearing in the
bearing housing on the outside of the idler
plate. The open face of the bearing points in.
Use green loctite #680 on the outer diameter
of the bearing before pressing in place.