Tennant 215E, Operator'S Manual

Page: 53 / 62

MAINTENANCE
3-29
215E MM158 (11--91)
9. Close the left side access door.
10. Check and adjust the main brush pattern as
described in TO CHECK AND ADJUST
MAIN 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 raised,
position the main brush over the chalked
area.
3. Place the main brush position lever in the
(Main Brush Down) position for 15 to 20
seconds while keeping a foot on the brakes
to keep the machine from moving.
This will lower the rotating main brush.
4. Place the main brush position lever in the
(Main Brush Up) position.
NOTE: If chalk or other material is not available,
allow the brushes to spin on the floor for two
minutes. A polish mark will remain on the floor.
5. Drive the machine off the test area.
A
B
00582
NORMAL MAIN BRUSH PATTERN
A. Main Brush Pattern
B. Pattern Width
A
00601
TAPERED MAIN BRUSH PATTERN
A. Main Brush Pattern
The pattern should be of equal width across the
length of the pattern. If the main brush pattern is
tapered, wider on one side by 0.50 in (15 mm) or
more than the other side, perform the following
leveling procedure:
A. Park the sweeper on a level surface,
raise the main brush, stop the motor,
and set the parking brake.
FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, And Turn
Off Machine.
B. Open the left side access door.
C. Remove the main brush.
D. Reinstall the idler arm. Let the front of
the arm drop to take up the slack in the
holes. Retighten the screws.
E. Place a block under the brush idler plug
and release the brush lift handle.
F. Remove the right side access door.
G. Remove the brush drive belt from the
spring idler sheave and allow the idler
arm to hang down.
H. Loosen the two Hex head screws and
move the drive assembly up or down to
center it the same distance from the
floor as the idler arm to obtain an even
pattern. Retighten the screws.
I. Replace the drive belt and remove the
block from under the brush idler arm.
J. Reinstall the main brush.
K. Recheck the main brush pattern to see
if the main brush is level.
L. Replace the right side access door and
close the left side access door.
The pattern should be 2 to 2.5 in (50 to 55 mm)
wide. If the main brush pattern is too narrow, turn
the main brush height adjustment knob clockwise.
If the main brush pattern is too wide, turn the
main brush height adjustment knob
counterclockwise. Recheck the pattern width after
making any adjustments.