Bolens 660 manual Orive Belts Upperand Lower, Figure Transmission Figure

Orive Belts {Upperand Lower)

NOTE: The engine pulley must be removed from the engine's crankshaft in order to change the tractor's drive belts. Doing so requires an air/impact wrench.

It is recommended that both belts be changed at the same time.

oPlace the deck engagement/lift lever in the engaged (all the way forward) position.

oUnthread the shift knob and remove the two flange screws which secure the shift cover panel in place. Refer to Figure 15. Remove the shift cover panel.

NOTE: There is a small yellow wire connected to a spring switch on the underside of the shift cover panel. Be careful not to damage it when removing the panel

,Using a spring puller (MTD Part No. 732-0571)or other suitable tool, disconnect the spring which is attached to a small hook found on the left, rear portion of the transmission. Refer to Figure 24.

,Using a spring puller (MTD Part No. 732-0571)or other suitable toot, disconnect the two springs which are attached to the rear portion of the tractor frame. See to Figure 32.

,Place the deck engagement/lift lever in the BLADES STOP position.

,Locate the two belt keeper pins, found on either

side of the engine pulley, and use a 1/4-inch socket wrench to remove them from the lower frame. Refer

to Figure 25.

NOTE: When reassembling, make certain belt keeper pins are assembled in the same locations from which they were removed.

°Using an impact gun with a 5/8-inch socket, remove the hex screw with secures the engine pulley to the engine crankshaft.

°Carefutlylower the pulley off of the crankshaft and remove the belt from around it.

°Disconnect the battery cables from the terminals (disconnect the NEGATIVE (Black) wire from it's terminal first, followed by the POSITIVE (Red) wire).

°Detach the battery hold-down rod and remove both the battery and battery tray from the tractor.

°Locate the transmission pulley though the battery tray opening. See Figure 33.

°Using an impact gun with a 13/16-inch socket, remove the pultey from the transmission's input shaft by removing the flange nut which secures it

°Carefully lift the pulley off of the transmission's input shaft and remove the upper drive belt from around it and the variable speed.

°

Figure 32

Transmission

Figure 33

NOTE: A spacer is located beneath the transmission pulley. Be careful not to lose the spacer and be certain NOT reinstall the spacer upside down.

,Remove the lower drive belt from around the lower portion of the variable speed pulley and feed it toward the shift cover panel opening.

,Remove the lower drive belt by lifting it through the cover panel opening.

,Reassemble new belts, following the previous instructions in reverse order.

IMPORTANT: When remounting the engine pulley, torque the hex bolt to between 38 foot-pounds and 50 foot-pounds.

IMPORTANT:When remounting the transmission pulley, torque the flange nut to between 25 foot-pounds and 33 foot-pounds.

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