Air Filter Maintenance - Troy-Bilt TB90BC Operator's Manual

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13. Insert the ends of the line through the eyelets in the
outer spool and place inner reel with spring inside the
outer spool (Fig. 35). Push the inner reel and outer
spool together. While holding the inner reel and outer
spool, grasp the ends and pull firmly to release the
line from the holding slots in the reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
14. Hold the inner reel in place and install the bump knob
by turning counterclockwise. Tighten securely.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the
bump knob clockwise (Fig. 15, Pg. 11). Inspect the
bolt inside the bump knob to make sure it moves
freely. Replace the bump knob if damaged.
2. Remove the old inner reel from the outer spool
(Fig. 27).
3. Remove the spring from the old inner reel
(Fig. 27).
4. Place the spring in the new inner reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
5. Insert the ends of the line through the eyelets in the
outer spool (Fig. 35, Pg. 18).
8. Place the new inner reel inside the outer spool. Push
the inner reel and outer spool together. While holding
the inner reel and outer spool, grasp the ends and
pull firmly to release the line from the holding slots in
the spool.
7. Hold the inner reel in place and install the bump knob
by turning counterclockwise. Tighten securely.
Replacement Parts:
See Accessories / Replacement Parts on page 22.
AIR FILTER MAINTENANCE
Removing the Air FUter/Muffler Cover
i_ll WARNING: To avoid serious personal injury,
always turn your trimmer off and allow it to cool
before you clean or do any maintenance on it.
1. Remove the four (4) screws securing the air
filter/muffler cover (Fig. 36). Use a flat blade or
T20 Torx bit screwdriver.
2. Push slightly up and then pull the cover from the
engine. Do not force.
Screws
Lever
Screws
Fig. 36
Cleaning the Air Filter
i_ WARNING: To avoid serious personal injury,
always turn your trimmer off and allow it to cool I
before you clean or do any maintenance on it. J
Clean and re-oil the air filter every 10 hours of operation.
It is an important item to maintain. Not maintaining the air
filter will VOID the warranty.
1. Remove air filter/muffler cover. See Removing the
Air FilterlMuffler Cover.
2. Turn cover over and look inside to locate the air filter.
Remove the air filter from inside the air filter/muffler
cover (Fig. 37).
,
Air Filter
F;Insi'lde I_luff;:r C:v_r
Fig. 37
Wash the filter in detergent and water (Fig. 38).
Rinse the filter thoroughly. Squeeze out excess
water. Allow it to dry completely.
/
Fig. 38
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