Models > LST140C

LST140C Black and Decker Trimmer

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Models for LST140C

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This is an OEM replacement cover for a string trimmer or edger. The cover holds the spool and line securely inside the spool housing. If this part has cracked or damaged, it will need to be replaced. ...
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This authentic string trimmer lever assembly is sold individually. The lever is what controls the amount of line that is fed from the auto-feed spool. The lever tends to wear over time, and so should ...
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This is an OEM spring located between the spool and spool cover of your trimmer. It is designed to hold the spool in position. This spring can lose tension over time and may cause the trimmer head to ...
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This is a Genuine OEM Sourced replacement part designed for Black and Decker String Trimmer. This item is used to secure and drive the Spool. It is made out of Plastic and Metal. Includes a Plastic Ho...
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This is a genuine Black and Decker replacement part designed for use with string trimmers. Edge guide serves a couple of purposes. When pushed down it can be used as a guide to edge your lawn. It can ...
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$6.51
This replacement screw is an authentic OEM sourced item, not an aftermarket equivalent. This is screw is used in a lot of different applications depending on your tool. Please check appropriate diagra...
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This genuine OEM sourced replacement part is specially designed for use with handheld Black and Decker string trimmers. It is secured over the trimmer head to direct grass clippings away from the user...
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This is a genuine Black and Decker replacement part that has been sourced from the original manufacturer to be used with trimmers. The metal spring is part of the cutting head assembly. The spring is ...
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This motor and mount assembly includes both the motor and its mounting plate, making it a reliable replacement for damaged or worn-out components in 40V trimmers. It’s designed to restore proper funct...
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The switch goes next to the trigger and is made of metal and plastic. This item is available as an individual replacement part. This is a genuine Black & Decker replacement part for use in string trim...
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Common Problems and Symptoms for LST140C

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Cutting line does not come out
Fixed by these parts
Fixing
How to fix it
Engine revs but trimmer head will not turn
Fixed by these parts
Fixing
How to fix it
Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
Customer:
Mark from CATOOSA, OK
Parts Used:
N498091, N498090, 90636582
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Screw drivers
Bearings on motor armature were shot ... driver gear not turning driven gear.
Took off line guard and guide. Remove 1 Phillips screw.
Opened motor head. Remove 7 torx screws
Opened split housing using a small straight slot screw driver.
Removed gear from housing and pulled it out the bearing housing.

Opened split housing on trigger end. 8 torn screws.
Opened split case with flat scr ew driver.
Removed motor connections in trigger end for motor.

Pulled motor cable and motor from extention tube.

Please note tube orientation for easy reassemble.

Install new cable/motor on trigger end. Reinstall housing on trigger end.

Install new motor and gear head into new housing. Be sure to install old electrical brace stop to protect new cable.

Roll gear head to verify easy non-binding rotation.

Install top of split case for motor/head end.

Reinstall line guard and line guide.

Test with battery to proof the assembly
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