Tennant 1186, Operator'S Manual

Page: 52 / 70

MAINTENANCE
1186 MM267 (6–94)
3Ć22
5. Evenly tighten the two screws to expand the
self-adjusting sheave.
6. Slip the short main brush belt off the
sheaves.
7. Place the side brush arm in the raised
position.
8. Slide the side brush belt off the engine
sheave.
A
B
C
D
F
E
G
H
03151
SIDE BRUSH BELT
A. Engine
B. Engine Sheave
C. Side Brush Belt
D. Belt Guide
E. Long Main Brush Belt
F. Belt Idler
G. Idler Sheave Spring
H. Two-Step Sheave
9. Disconnect the idler sheave spring.
10. Remove the snap ring from the two-step
sheave and slide the sheave off the shaft.
11. Pull belt idler back and slide the long main
brush belt out of the machine.
12. Position the new long main brush belt in the
machine.
13. Reinstall the two-step sheave and reconnect
the idler sheave spring.
14. Position the side brush belt over the engine
sheave and under the belt guide.
15. Slide the short main brush belt over the
self-adjusting sheave and the two-step
sheave.
16. Unthread the two screws separating the
self-adjusting sheave.
17. Adjust the belt tension as described in TO
CHECK AND ADJUST SIDE BRUSH BELT
TENSION.
18. Replace the right side bumper and cover,
and engine access cover.
19. Replace the debris hopper.
VACUUM FAN BELT
The vacuum fan belt transfers power from the
engine to the vacuum fan impeller. Check the belt
for wear and tension after every 50 hours of
operation.
TO CHECK AND ADJUST VACUUM FAN BELT
TENSION
1. Stop the engine and set the machine
parking brake.
FOR SAFETY: Before Leaving Or Servicing
Machine; Stop On Level Surface, Set Parking
Brake, And Turn Off Machine.
2. Open the filter cover.
3. Check belt deflection by applying a force of
2 lb (1 kg) to the midpoint of the belt span.
The belt should deflect 0.09 in (5 mm).