Yard-Man LT31 - Manual (Page 11)

11
SECTION 5: MAINTAINING YOUR TRIMMER
FIGURE 11
Spring
Bump Knob
LINE INSTALLATION
This section covers both Split-Line™ and standard
single line installation.
Always use original equipment 2.03 mm (0.080 inch)
replacement line. Line other than specified may make
the engine overheat or fail.
WARNING: Never use metal-reinforced line,
wire or rope. These can break off and become
dangerous projectiles.
There are two methods to replace the trimming line:
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Inner Reel
1. Hold the outer spool with one hand and unscrew the
bump knob counterclockwise, Figure 11. Inspect the
bolt inside the bump knob to make sure it moves
freely. Replace the bump knob if damaged.
2. Remove the inner reel from the outer spool, Figure 12.
3. Remove spring from the inner reel, Figure 12.
4. Use a clean cloth to wipe the the inner reel, spring, shaft,
and inner surface of the outer spool, Figure 13.
FIGURE 12
Inner Reel
5. Check the indexing teeth on the inner reel and outer
spool for wear, Figure 14. If necessary, remove burrs
or replace the reel and spool.
FIGURE 13
Outer Spool
FIGURE 14
Indexing Teeth
Outer Spool
Inner Reel
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure about
these procedures take your unit to an
authorized service dealer.
MAINTENANCE SCHEDULE
These required maintenance procedures should be
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-up.
MAINTENANCE REQUIRED
Fill fuel tank with correct oil and petrol mixture
Clean and re-oil air filter
Check and clean spark arrestor
Check spark plug condition and gap
Inspect exhaust port and spark arrestor screen for clogging
or obstruction to assure maximum performance levels
FREQUENCY
Before Starting Engine
Every 10 Hours
Every 25 Hours
Every 50 Hours
REFER TO
Page 8
Page 13
Page 15
Page 14
Page 15
WARNING: To prevent serious injury, never
perform maintenance or repairs with unit
running. Always perform maintenance and
repairs on a cool unit. Disconnect spark plug
wire to ensure the unit will not start.
NOTE: Maintenance, Replacement, or Repair of the
emission control devices and system may be
performed by any non-road engine repair
establishment, individual or authorized service
dealer.
In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. If you feel your engine is need of this
inspection, refer service to an authorized servicing dealer, or
establishment for repair. DO NOT attempt to perform this
process yourself as engine damage may result from
contaminants involved in the cleaning process for the port.