Bolens TRANSMATIC LAWN TRACTOR 660 - Manual (Page 26)

Drive Be№ (Upper and Lower)
NOTE: The engine puaey must be removed from the
engine’s crankshaft in order to change the tracdor’s
drive belts. Doing so requires an air/impact wrench.
it is recommended that both belts be changed at the
same time.
* Place the deck engagement/lifl lever in the
engaged (all the way forward) position.
* Unthread the shift knob and remove the two fiange
screws which secure the shift cover panel in place.
Refer to Figure 15. Remove the shift cover panel.
NOTE: There is a small yeilow 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 tool, 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.
* Carefully lower the pulley off of the crankshaft and
remove the belt from around it.
* Disconnect the battefy 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 pulley from the transmission’s input
shaft by removing the fiange 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
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 fiange nut to between 25 foot-pounds and 33
foot-pounds.
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