WARNING:
To prevent serious injury, never perform
maintenance or repairs while the unit is running. Always
allow the unit to cool before servicing or repairing the unit.
Disconnect the spark plug wire to prevent the unit from
starting accidentally.
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency
stated in the table. These procedures should also be a part of any
seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures, take the unit to
an MTD authorized service dealer.
NOTE: Maintenance, replacement, or repair of the emission control
devices and system may be performed by an MTD authorized
service dealer.
NOTE: Please read the California/EPA statement that came with the
unit for a complete listing of terms and coverage for the emissions
control devices, such as the spark arrestor, muffler, carburetor, etc.
FREQUENCY
MAINTENANCE REQUIRED
Every 10 hours
•
Clean and re-oil the air filter. Refer to
Maintaining the Air Filter.
Every 25 hours
•
Check the spark plug condition and gap.
Refer to Maintaining the Spark Plug.
INSTALLING / REPLACING THE SAW CHAIN
WARNING:
To prevent serious personal injury, always
wear heavy gloves when handling the saw chain.
1. Remove the screw and two (2) bar-retaining nuts. Remove the
bar cover (Fig. 10).
2. Use a flat-head screwdriver to turn the chain-tensioning screw
counterclockwise four (4) turns (Fig. 13).
3. Remove the saw chain and guide bar.
4. Fit the new saw chain into the guide bar groove with the cutting
edges of the saw chain pointing in the direction of rotation (Fig. 11).
5. Loop the saw chain over the drive sprocket (Fig. 12).
6. Adjust the chain-tensioning screw to allow the insertion of the
guide bar. Install the guide bar. The two bar-retaining studs
should protrude through the slot in the guide bar (Fig. 12).
7. Make sure the saw chain is in the guide bar groove and adjust
the saw chain tension. Refer to Adjusting the Saw Chain Tension.
8. Install the bar cover. Tighten the screw and two (2) bar-retaining
nuts.
MAINTENANCE
Bar Cover
Screw
Drive Sprocket
14
Bar-Retaining Nuts
Fig. 10
Fig. 11
Bar-Retaining Studs
Guide Bar
Slot
Fig. 12