Troy-Bilt 664DM, E666MM manual CheckingForward Belt Tension, Adjustingthe Forward ClutchCable

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove the key from the keyswitch on units so equipped.

Failure to follow these instructionscan result in serious personal injury or property damage.

Incorrectcable adjustment could cause the wheels and tines to rotate unexpect- edly. Follow adjustment procedures carefully. Failure to do so could result in personalinjury or propertydamage.

CheckingForward Belt Tension

1.Beforechecking, shut off engine, allow the engine and muffler to cool down, dis- connect the spark plug wire, removethe ignition keyon electric start models.

2.The coiled part of the forward clutch spring (E, Figure5-10) measures2" in length when the Forward Clutch Control leversare not pulled up. Pull either ForwardClutch Control Lever up against the handlebar and measurethe length of the coil on the forward clutch spring. Tension is correct if the length of the

extended coil is 2-1/2" (see Figure5-11). The forward clutch control cable needs

adjustment if the extendedlength of the coil is not 2-1/2". See Adjusting the Forward Clutch Beltfor a procedure.

Adjustingthe Forward ClutchCable

Do this procedure if the forward clutch spring measurement is not correct (see CheckingForward Belt Tension).

1.Beforeadjusting 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.

forward clutch cable adjuster (F,Figure 5- 10). Usetwo 1/2", open-end wrenches to

loosen the two jam nuts (A, Figure5-12) a few turns.

3.Movecable adjuster (B, Figure5-12) downward for more belt tension (see Figure5-12).

4.Handtighten the jam nuts and pull the ForwardClutch Control leversup against the handlebar. Measurethe spring coil (Figure 5-11). The extendedlength of the coil should be2-1/2". Repeatthis proce- dure until the extendedspring length is correct.

5.Tighten both jam nuts securely.

Checking and AdjustingReverse ClutchBelt Tension

CheckingReverse ClutchBelt Tension

The reverseclutch belt (D, Figure5-9) needsadjustment if the belt slips in reverseor if there is no reverse. See

Adjusting ReverseClutch Belt below.

AdjustingReverse ClutchBelt

1.Beforeadjusting the belt, shut off engine, allow the engine and muffler to cool down, disconnectthe spark plug wire, and removethe ignition key on elec- tric start models.

I

Figure 5-14: Reverse clutchcable adjuster. Left-side viewwith belt coverremoved.

4. Move the cable adjuster (D, Figure

5-14) awayfrom the pulleys to increase belt tension.

5.Tighten both jam nuts securely.

6.Reinstall the belt cover.

7.Move the unit to an openareaand test the reverseoperation. Repeatthis proce- dure if the unit does not respond when the reverseclutch is engaged.

FORWARD CLUTCH BELTREMOVAL

AND REPLACEMENT

The forward clutch belt (K, Figure5-15) engagesthe engine pulley (I) and the transmission pulley (J) when either Forward Clutch Control Lever is pulled up againstthe handlebar. This tightens the forward clutch cable (G)which causes the forward clutch idler pulley (H) to apply pressureto the forward clutch belt. This causesthe pulleysto turn for Forward movement.

Figure5-13: Belt cover.

,

Tension.

Figure5-12: Moveforwardclutchcable adjusterdownformorebelttension.

2.Belt adjustments aredone with the

2.Removethe two nuts (C, Figure5-13) and removethe belt cover.

3.Reversebelt tension adjustments are donewith the reverseclutch cable adjuster located on the left side of the

machine nearthe engine (D, Figure 5-14). Usetwo 1/2" open-endwrenches to

loosen the two adjuster jam nuts (E) afew turns.

Figure 5-15: Forwardclutchcontrol assembly.