Troy-Bilt TB590 EC Operator'S Manual Download

Page: 7 / 24

LINE INSTALLATION

This section covers both SplitLine™ and
standard single line installation.
Always use original equipment manufacturer
0.105 in. (2.67 mm) replacement line. Other types
of line may make the engine overheat or fail.
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 clockwise (Fig. 27).
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

(Fig. 27).

3. Remove spring from the inner reel (Fig. 28).
4. Use a clean cloth to clean the the inner reel,

spring, shaft and inner surface of the outer
spool (Fig. 28).

5. Check the indexing teeth on the inner reel and

outer spool for wear (Fig. 29). If necessary,
remove burrs or replace the reel and spool.

NOTE:

Always use the correct line length when

installing trimming line on the unit. The line
may not release properly if the line is too long.

MAINTENANCE AND REPAIR INSTRUCTIONS

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 your unit to any non-road
engine repair establishment, individual or authorized service dealer.

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.

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.

WARNING:

To prevent serious injury, never perform maintenance

or repairs with unit running. Always service and repair a cool unit.
Disconnect the spark plug wire to ensure that the unit cannot start.

Fig. 27

Fig. 29

Spring

Outer
Spool

Inner Reel

TIPS FOR BEST TRIMMING RESULTS

• For best trimming results, operate unit at full throttle.
• Keep the cutting attachment parallel to the ground.
• Do not force the cutting attachment. Allow the tip of the line to do the

cutting, especially along walls. Cutting with more than the tip will reduce
cutting efficiency and may overload the engine.

• Cut grass over 8 inches (200 mm) by working from top to bottom in small

increments to avoid premature line wear or engine drag.

• Cutting from right to left improves the unit's cutting efficiency. Clippings are

thrown away from the operator.

• Slowly move the trimmer into and out of the cutting area at the desired

height. Move either in a forward-backward or side-to-side motion. Cutting
shorter lengths produces the best results.

• Trim only when grass and weeds are dry.
• The life of your cutting line is dependent upon proper adherence of

explained trimming techniques, what vegetation is cut, and where
vegetation is cut.

For example, the line will wear faster when trimming against a foundation wall
as opposed to trimming around a tree.

DECORATIVE TRIMMING

Decorative trimming is accomplished by
removing all vegetation around trees, posts,
fences and more.
Rotate the whole unit so that the cutting attachment
is at a 30° angle to the ground (Fig. 24).

USING THE CUTTING BLADE

Before operating the unit with the cutting blade, stand
in the operating position (Fig. 25). Refer to Holding
the Trimmer.

CUTTING BLADE OPERATING TIPS

To establish a rhythmic cutting procedure:
• Plant feet firmly, comfortably apart.
• Bring the engine to full throttle before entering the

material to be cut. At full throttle the blade has
maximum cutting power and is less likely to bind, stall
or cause blade thrust (which can result in serious
personal injury to the operator or others).

• Cut while swinging the upper part of your body from

left to right.

• Always release the throttle trigger and allow the engine to return to idle

speed when not cutting.

• When you are finished, always unsnap the unit from the harness before

taking off the harness.

• Swing the unit in the opposite direction as the blade spins, which increases

the cutting action.

• After the return swing, move forward to the next area to be cut plant your

feet again.

• The cutting blade is designed with a second cutting edge. You can use it by

removing the blade, turning it upside down, and reinstalling it.

OPERATING INSTRUCTIONS

To reduce the chance of material wrapping around
the blade, follow these steps:
• Cut at full throttle
• Swing the unit into material to be cut from

your left to your right (Fig. 26)

• Avoid the material just cut as you make the

return swing

Fig. 24

Fig. 26

WARNING:

Always wear eye, hearing, foot and body protection

to reduce the risk of injury when operating this unit.

WARNING:

Do not use the cutting blade for edging or as an

edger. Severe personal injury to yourself or others can result.

WARNING:

Blade thrust may occur when the spinning blade

contacts an object that it does not immediately cut. Blade thrust can be
violent enough to cause the unit and/or operator to be propelled in any
direction, and possibly lose control of the unit. Blade thrust can occur
without warning if the blade snags, stalls or binds. This is more likely to
occur in areas where it is difficult to see the material being cut.

WARNING:

The blade continues to spin after the engine is turned

off. The coasting blade can seriously cut you if accidentally touched.

WARNING:

Do not sharpen the cutting blade. Sharpening the

blade can cause the blade tip to break off while in use. This can result
in severe personal injury to yourself or others. Replace the blade.

WARNING:

Do not clear away any cut material with the engine

running or blade turning. To avoid serious personal injury, turn off
the engine. Allow the blade to stop before removing materials
wrapped around the blade shaft.

Index Teeth

Bolt

Bump Knob

WARNING:

Never use metal-reinforced line, wire, chain or rope.

These can break off and become dangerous projectiles.

OPERATING INSTRUCTIONS

trimming line fully extended. Line release becomes more difficult as the cutting
line becomes shorter.

NOTE:

Do not rest the Bump Head™ on the ground while the unit is running.

Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts

Fig. 28

FREQUENCY

MAINTENANCE REQUIRED

SEE

Every 10 hours

Clean and oil air filter

p. 8

After 1st 10 hours

Change oil

p. 8

Every 25 hours

Change oil