Tennant 1550, Manual

Page: 84 / 628

MAINTENANCE
1550 Gas/LPG/Diesel MM283 (9--01)
3--38
5. The rear brush polish mark is the most
critical and should be adjusted first. If the
polish mark is uneven or cone shaped from
one end to the other, the brush leveling
spring located at the operator side of the
head lift, should be adjusted. The spring
compensates for the weight of the brush
drive motors. Loosen the top nut first to
make the adjustment.
A
00082
TAPERED BRUSH PATTERN
A. Operator Side
Lower the brush leveling adjusting nut if the
polish mark is too wide on the operator’s
side.
A
00082
TAPERED BRUSH PATTERN
A. Operator Side
Raise the brush leveling adjusting nut if the
polish mark is too narrow on the operator’s
side. Re-tighten the top nut after making
adjustments.
B
C
A
00285
LEVELING BRUSH
A. Top Nut
B. Brush Leveling Adjusting Nut
C. Operator Side of Scrub Head
6. The polish mark of the front brush should
match the polish mark of the rear brush. If
the front brush polish mark is uneven, the
narrow side should be shimmed. Add shims
to the shaft bearing mount located on the
underside of the scrub head. Remove the
debris trough, loosen the bolts holding the
bearing protector, and loosen the flat socket
head bolts that hold the bearing mounting
bracket before installing shims. One 0.12 in
(3 mm) thick shim will add about 0.50 in (13
mm) width to the polish mark.
B
A
C
00082
TAPERED BRUSH PATTERN
A. Operator Side
B. Rear Brush Marks
C. Front Brush Marks
B
C
A
00082
TAPERED BRUSH PATTERN
A. Operator Side
B. Rear Brush Marks
C. Front Brush Marks
A
D
C
B
00284
BRUSH SHAFT MOUNTING
A. Scrub Head
B. Shim
C. Bearing Mounting Bracket
D. Bearing Protector