Tennant 186, Operator'S Manual, Page: 55 / 88

MAINTENANCE
3Ć19
186 MM159 (6–94)
BELTS AND CHAINS
PROPELLING BELTS
The propelling belts transfer power from the
engine to the machine differential. Check the belts
for wear and tension after every 50 hours of
operation.
TO CHECK AND ADJUST PROPELLING BELTS
TENSION
1. Park on level surface. 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. Remove the engine access cover, right side
bumper and cover.
3. Observe the position of the clutch plate bolt
with no pressure on the clutch handle. It
should be approximately in the center of the
slot.
4. Press the clutch handle to tighten the
forward propelling belt. The clutch handle
should be at least 0.75 in (20 mm) from the
stationary handle for machines below serial
number 006000. The clutch handle should
be 0.25 to 0.50 in (7 to 13 mm) from the
stationary handle for machines serial
number 006000 and above. Observe the
position of the clutch plate bolt. It should not
touch the end of the slot. If the handle and
bolt are in the proper position, skip to step 8;
if not, continue with step 5 to readjust
forward belt tension.
A
B
C
D
H
G F
E
I
03151
PROPELLING BELTS
A. Engine
B. Clutch Plate
C. Clutch Plate Bolt
D. Bolt Slot
E. Forward Belt Idler Sheave
F. Reverse Propelling Belt
G. Forward Propelling Belt
H. Reverse Belt Idler Sheave
I. Belt Guide
5. Loosen the forward idler sheave bolt and
slide the idler sheave down to tighten the
belt (this also increases distance between
clutch handle and stationary handle); slide
the sheave up to loosen the belt (this also
reduces distance between clutch handle and
stationary handle).
6. Tighten the idler sheave bolt.
7. Recheck handle and bolt positions. Repeat
as necessary to adjust belt tension.
NOTE: After adjusting the forward belt, it may
contact the belt guide when engaged causing a
whining noise. To stop the noise, bend the guide
up out of the belt’s way.
8. Pull the clutch handle to tighten the reverse
propelling belt. Observe the position of the
clutch plate bolt. It should not touch the end
of the slot. If the bolt is in the proper
position, skip to step 12; if not, continue with
step 9 to readjust reverse belt tension.
NOTE: If the reverse belt is too tight, it will require
excessive clutch handle pressure to propel
machine in the forward direction. It may also
cause the machine to creep backward when the
handle is released.