Maintenance Checklist; Gas/Propane Models Only; All Models - Smith FS351 Series Operation - Repair - Parts

Maintenance Checklist

Gas/Propane: To avoid injury from unexpected start
up, disable engine as follows: 1) Turn DCS Power
Switch OFF. 2) Turn ignition OFF. 3) Disconnect spark
plug wires. 4) Disconnect negative (-) battery cable
from battery.
Electric: To avoid injury from unexpected start up,
disconnect power plug before you service your
machine.
Electric: To avoid injury from unexpected movement,
ensure Power Switch is in the OFF position before
connecting or disconnecting the power cord.

Gas/Propane Models only

• Check heavy-duty air cleaner element.
Gas Models
- Weekly: Check filter minder.
- *Every 150 Hours: Check heavy-duty air
cleaner element.
- Every 300 Hours: Replace heavy-duty air
cleaner element and check inner element.
- Every 600 Hours: Replace heavy-duty inner air
cleaner element.
Propane Models
- *Every 150 Hours: Check heavy-duty filter
minder. Inspect heavy-duty air filter paper ele-
ment and inlet screen area.
- *Every 300 Hours: Replace heavy-duty air
cleaner element and check inner element.
- *Every 600 Hours or Yearly: Replace
heavy-duty inner air cleaner element.
* Perform these procedures more frequently under
severe, dusty, dirty conditions.
3A7832A
• Maintain proper engine oil and crankcase levels.
Change every 25-50 hours (see Kohler manual).
• Clean spark plugs regularly, and set the proper gap
(see Kohler manual).

All Models

• Keep a coating of grease on the drive shaft and
threads for easy installation or removal, and for
longer hex bushing life.
• During oil changes or routine maintenance, check all
fasteners and re-tighten, since the machine will
vibrate the fasteners loose if they are not secured.
Use medium strength thread locking compound.
• Check the Drive and Hydraulic belts for wear, and
adjust tension (page 22) or replace as needed. After
replacing belts, check for proper tension.
• Check to ensure the pulleys are aligned properly to
ensure the Drive and Hydraulic belts are running
true.
• The inside housing must be clean. Remove build-up
from inside the cage so cutters and drum rotate
freely.
• Inspect and change drum bushings and shafts every
40 hours, or when worn.
• Ensure hydraulic fluid level reservoir is filled to the
proper level and inspect fittings for leaks. Tighten as
necessary. For accurate level readings, take
readings when fluid is cold.
The hydraulic fluid for the hydraulic drive pump should be
chemically stable and incorporate rust and oxidation
inhibitors.
Specific fluid type meeting these requirements: ISO 68
Synthetic Oil or 15W50 Synthetic Oil.
Maintenance Checklist
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