Tennant 96GR, Operator'S Manual

Page: 68 / 84

MAINTENANCE
95GR MM199 (10---89)
3-32
12. Slide the main brush into the brush
compartment and onto the drive plug. Make
sure the drive slots and keys line up.
NOTE: The bottom of the brush arms should be less
than 1 in (25 mm) from the floor. If they are not, turn
the brush height adjustment knob to position the
arms.
13. Align the main brush idler plug slots with the
main brush keys.
14. Slide the main brush idler plug into the main
brush tube.
15. Slide the brush idler arm onto the arm hub.
16. Thread the brush idler arm retaining bolt
through the idler arm and into the arm hub.
17. Tighten the brush idler arm retaining bolt.
NOTE: If replacing a wire brush, slide the wire brush
dolly out from under the wire brush.
18. Close the right side brush access door.
19. Check and adjust the brush pattern as
described in
To Check and Adjust Main Brush
Pattern or To Check and Adjust Wire Brush
Pattern .
TO CHECK AND ADJUST MAIN BRUSH PATTERN
1. Apply chalk, or some other material that will not
blow away easily, to a smooth, level floor.
2. With the side brush and main brush in the
“raised” position, position the main brush over
the chalked area.
3. Start the main brush rotating, while keeping a
foot on the brakes to keep the machine from
moving.
4. Lower the main brush to the floor for 15 to 20
seconds.
NOTE: If no chalk or other material is available, allow
the brushes to spin for two minutes.
5. Raise the main brush after it has been spinning
on the chalk marks for 15 to 20 seconds.
6. Drive the machine off the test area.
7. Observe the width of the brush pattern. The
proper brush pattern width is 2 to 2.5 in (51 to
54 mm).
A
B
00582
NORMAL MAIN BRUSH PATTERN
A. Main Brush Pattern
B. 2 to 2.5 in (51 to 54 mm)
00601
TAPERED MAIN BRUSH PATTERN
If the main brush pattern is tapered, loosen the left
main brush cross shaft bearing mounting brackets
and bearing flanges. Pivot the bearing mounting
bracket to level the cross shaft. Tighten the bearing
mounting bracket and the bearing flanges. Check
the main brush pattern and readjust as necessary.
Then adjust the width of the main brush pattern.
To widen the main brush pattern, loosen the locking
wing nut and turn the adjustment knob
counterclockwise from the top. To narrow the main
brush pattern, loosen the locking wing nut and turn
the adjustment knob clockwise from the top.