Maintenance; Troubleshooting - Black & Decker LST400 Instruction Manual

• Depress the tabs (15) and remove the spool cap (9) from the spool housing (16) in the
trimmer head (figure M).
• For best results, replace spool with BLACK+DECKER model # AF-100.
• Grasp empty spool with one hand and spool housing with other hand and pull spool out.
• If lever (17) in base of housing becomes dislodged, replace in the position as shown in figure
N before inserting new spool into housing.
• Remove any dirt and grass from the spool and housing.
• Unfasten the end of the cutting line and guide the line into the eyelet (19) figure O.
• Take the new spool and push it onto the boss (18) (figure N) in the housing. Rotate the spool
slightly until it is seated. The line should protrude approximately 5-3/8 inches (136mm) from
the housing.
• Align the tabs on the spool cap with the slots (20) in the housing (figure O).
• Push the cap onto the housing until it snaps securely into place.
CAUTION:
To avoid trimmer damage, if the cutting line protrudes beyond the trimming
blade, cut it off so that it just reaches the blade.
REWINDINg SPOOL FROM BULK LINE
(USE ONLY .065 IN. ROUND DIAMETER LINE)
Bulk line is also available for purchase from your local retailer.
NOTE:
Hand wound spools from bulk line are likely to become tangled more frequently than
BLACK+DECKER factory wound spools. For best results, factory wound spools are recommended.
To install bulk line, follow the steps below:
• Remove battery from trimmer.
• Remove the empty spool from the trimmer as described in "REPLACING THE SPOOL".
• Remove any remaining cutting line from the spool.
• Make a fold at the end of the cutting line at about 3/4 inch (19mm) (21). Feed the cutting line
into one of the line anchoring slots (22) as shown in figure P.
• Insert the 3/4 inch (19mm) end of the bulk line into the hole (23) in the spool adjacent to the
slot as shown in figure Q. Make sure the line is pulled tight against the spool as shown in
figure Q.
• Wind the cutting line onto the spool in the direction of the arrow on the spool. Make sure to
wind the line on neatly and in layers. Do not crisscross (figure R).
• When the wound cutting line reaches the recesses (24), cut the line. (figure Q).
• Fit the spool onto the trimmer as described in "REPLACING THE SPOOL".

MAINTENANCE

WARNINg:
To avoid serious injury, remove the battery from the trimmer before
performing any maintenance.
CAUTION:
To assure product SAFETY and RELIABILITY, repairs, maintenance and
adjustment should be performed by authorized service centers or other qualified service
organizations, always using identical replacement parts.
1. Keep the air intake slots clean to avoid overheating.
2. Your trimmer line can dry out over time. To keep your line in top condition, store spare pre-
wound spools or bulk line in a plastic, sealable bag with a tablespoon of water.
3. Plastic parts may be cleaned by using a mild soap and a damp rag.
4. The line cutter on the edge of the guard can dull over time. It is recommended you
periodically touch-up the sharpness of the blade with a file.

TROUBLESHOOTINg

TRIMMER RUNS SLOWLY
• Remove Battery from tool.
• Check that the spool housing can rotate freely. Carefully clean it if necessary.
• Check that the cutting line does not protrude more than approximately 5-3/8 inches
(136mm) from the spool. If it does, cut it off so that it just reaches the line trimming blade.
AUTOMATIC LINE FEED DOES NOT WORK
• Remove Battery from tool.
• Remove the spool cap.
• Pull the cutting line until it protrudes approximately 5-3/8 inches (136mm) from the spool. If
insufficient cutting line is left on the spool, install a new spool of cutting line.
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