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Troy-Bilt TB25CB Addendum page 4

Line replacement addendum
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REPLACING THE TRIMMING LINE
WARNING:
while the unit is running. Always stop the unit and allow it to cool first. Disconnect the
spark plug wire to prevent the unit from starting accidentally.
Only use the trimming line described in the Specifications section of the Operator's Manual. Other types
of trimming line may cause the unit to overheat or fail.
WARNING:
and become dangerous projectiles.
NOTE: Always use the correct line length when installing trimming line. The line may not release
properly if the line is too long.
Part 1 - Removing the Inner Reel
1. Hold the cutting head in place (Fig. 1). Turn the bump knob counterclockwise to unscrew it from
the cutting head (Fig. 1).
NOTE: The outer spool will remain attached to the unit.
2. Inspect the bolt inside the bump knob to make sure it moves freely (Fig. 1). Replace the bump
knob if it is damaged.
3. Remove the inner reel from the outer spool (Fig. 2).
4. Remove the spring from the inner reel (Fig. 2).
5. Use a clean cloth to clean the inner reel, spring, arbor and inner surface of the outer spool.
6. Check the indexing teeth and holding slots for wear (Fig. 3). If necessary, remove burrs or replace
the inner reel and outer spool.
Proceed to Part 2 - Winding New Trimming Line onto the Inner Reel.
Part 2 - Winding New Trimming Line onto the Inner Reel
If using single line, refer to Winding Single Line.
If using split line, refer to Winding Split Line.
If using a prewound inner reel, proceed to Part 3 - Installing the Inner Reel.
Winding Single Line
1. Cut one 12-foot (3.7 m) length of new single trimming line. Fold the line in half to create a loop in
the middle.
2. Insert the loop into the slot in the split wall (Fig. 4). Wind the line tightly in the direction shown on
the bottom of the inner reel until about 6 inches (150 mm) of line remains. Keep the top half of the
line above the split wall and the bottom half of the line below the split wall.
3. Insert the two 6-inch ends into the two .095 holding slots (Fig. 6).
NOTE: Failure to wind the line in the direction indicated will cause the cutting head to operate incorrectly.
Proceed to Part 3 - Installing the Inner Reel.
Winding Split Line
1. Cut one 6-foot (1.8 m) length of new split line trimming line. Split each end about 6 inches (150 mm).
2. Using one split end, insert one line into the top hole and the other line into the bottom hole in the
inner reel (Fig. 5).
3. Wind the line tightly in the direction shown on the bottom of the inner reel. The split wall will
automatically divide the line. Wind the line until it is completely divided and about 6 inches (150
mm) of line remains.
To prevent serious injury, never attempt to replace the trimming line
Never use metal-reinforced line, wire, chain or rope. These can break off
4

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