Troy-Bilt 665B - Manual (Page 20)

20 Section 5: Maintenance
Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come
to a complete stop, remove ignition key on electric start models, disconnect spark plug wire and move
wire away from spark plug.
Failure to follow these instructions can result in serious personal injury or property damage.
WARNING
Checking and Adjusting Reverse
Clutch Belt Tension
Checking Reverse Clutch Belt Tension
The reverse clutch belt (D, Figure 5-9)
needs adjustment if the belt slips in
reverse or if there is no reverse. See
Adjusting Reverse Clutch Belt below.
Adjusting Reverse Clutch Belt
1. Before adjusting the belt, shut off
engine, allow the engine and muffler to
cool down, disconnect the spark plug
wire, and remove the ignition key on elec-
tric start models.
2. Remove the two nuts (C, Figure 5-13)
and remove the belt cover.
3. Reverse belt tension adjustments are
done with the reverse clutch cable adjuster
located on the left side of the machine
near the engine (D, Figure 5-14). Use two
1/2" open-end wrenches to loosen the two
adjuster jam nuts (E) a few turns.
4. Move the cable adjuster (D, Figure
5-14) away from the pulleys to increase
belt tension.
5. Tighten both jam nuts securely.
6. Reinstall the belt cover.
7. Move the unit to an open area and test
the reverse operation. Repeat this proce-
dure if the unit does not respond when the
reverse clutch is engaged.
FORWARD CLUTCH BELT REMOVAL
AND INSTALLATION
The forward clutch belt (K, Figure 5-15)
engages the engine pulley (I) and the
transmission pulley (J) when either
Forward Clutch Control Lever is pulled up
against the handlebar. The lever draws
the forward clutch cable (G) tight which
causes the forward clutch idler pulley (H)
to apply pressure to the forward clutch
belt. This causes the pulleys to turn for
Forward movement.
Removing Forward Clutch Belt
1. Stop engine, allow it to cool and dis-
connect spark plug wire before working
near belts. Also remove ignition key on
electric start models.
2. Remove the belt cover by removing the
two nuts (C, Figure 5-13).
3. Move the reverse clutch belt (B, Figure
5-16) out of the way. (You do not need to
completely remove the belt.) Press the
reverse idler pulley inward to create slack,
and then slip the bottom half of the belt
completely off the transmission pulley (A,
Figure 5-16). Pull the bottom half of the
belt out of the housing and let it hang off
the outside of the unit (B).
4. Disconnect the forward clutch cable
from the forward clutch idler arm bracket
(Figure 5-17). Note the hole from which
you disconnect the cable. It is important
that you reconnect the cable to the same
hole.
Figure 5-13: Belt cover.
Figure 5-12: Move forward clutch cable
adjuster down for more belt tension.
A More Belt
Tension.
B
C
Figure 5-15: Forward clutch control
assembly.
G
I
J
H
K
Figure 5-14: Reverse clutch cable adjuster.
Left-side view with belt cover removed.
D F
Move cable
adjuster away
from pulleys to
increase reverse
belt tension.
E
Figure 5-16
A
B
Figure 5-11: Correct spring length when
Forward Clutch Levers are engaged is 2-1/2".
2-1/2"
extended
spring length