Drum Installation/Replacement - Smith FS351 Series Operation - Repair - Parts

Setup

Drum Installation/Replacement

Gas/Propane: To avoid injury from unexpected start
up, turn ignition OFF, remove key, and disconnect
spark plug wires before you service your unit.
Electric: To avoid injury from unexpected start up,
disconnect power plug before servicing your machine.
Normal use will require periodic drum inspection and
may necessitate drum replacement. Time of
replacement will vary according to usage and load
factors.
Tools needed:
• 9/16" socket or wrench
• Rubber mallet
• 1-1/8" wrench
1. Turn DCS Power Switch ON. Wait until the FS351
cools off if it has been running.
2. Press Home Button on DCS Control to raise the
cutter drum off the work surface.
Once at home position, disconnect negative (-) battery
cable for gas/propane units. For electric units,
disconnect power plug. If more adjustment is needed at
this point, use the Manual Height Adjustment, page
20.
3. Using 1-1/8" and 9/16" wrench, lower jam nuts and
support bolts on engine/motor plate so that tension
is released off belt.
12
4. Remove six hex head cap screws from the Side
Plate using the 9/16" socket or wrench.
5. Remove the Side Plate (this may require the rubber
mallet to break it loose).
6. Slide out the drum assembly. Use caution as the
assembly is heavy.
7. Before replacing the drum onto hex shaft:
a. Check that all bearings are in good working
order.
b. Remove dirt and material build-up from inside
main housing and drum.
c. Apply grease to all metal contacts.
d. Check drum spacers for wear, replace if
necessary (if applicable).
8. Align and slide drum back onto the hex shaft.
9. Replace Side Plate (slide onto) hex shaft and
reinstall the six cap screws and torque to 40 ft/lbs
(54.2 N•m). Check that drum moves side to side and
drum spacers are free to move (if applicable).
10. To tension the belt, turn the base plate pivot nut with
the 1-1/8" wrench. This will raise the engine/motor
base plate. Use the 9/16" wrench to raise bolts into
place, locking jam nut when complete.
NOTE: An extra drum loaded with cutters for rapid
job site replacement is recommended.
3A7832A