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LST140C (Type 1) Black and Decker Trimmer - Overview

Sections of the LST140C

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COVER SPOOL – Part Number: 385022-03N
COVER SPOOL
★★★★★
★★★★★
(1)
PartSelect #: PS18981315
Manufacturer #: 385022-03N
This cover is designed for use with trimmers and edgers and is a genuine OEM part. Made of plastic, this cover is used to hold and secure the spool or line within the trimmer cutter head assembly. If ...
$6.40
  In Stock
Order now and your part arrives by Jul 20
SA GEAR AND SPINDLE, SERV ONLY – Part Number: N498091
SA GEAR AND SPINDLE, SERV ONLY
★★★★★
★★★★★
(1)
PartSelect #: PS18994000
Manufacturer #: N498091
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...
$23.82
  In Stock
Order now and your part arrives by Jul 20
SA MOTOR AND MOTOR PLATE, SERV – Part Number: N498090
SA MOTOR AND MOTOR PLATE, SERV
PartSelect #: PS18993999
Manufacturer #: N498090
This motor and mount assembly is a complete replacement unit designed for use in select cordless trimmers. It includes both the motor and the mounting plate, ensuring a secure and stable installation ...
$53.37
  In Stock
Order now and your part arrives by Jul 20
SA MOTOR HOUSING – Part Number: 90636582
SA MOTOR HOUSING
PartSelect #: PS18989526
Manufacturer #: 90636582
$15.20
  In Stock
Order now and your part arrives by Jul 20
TRIGGER – Part Number: 90621578
TRIGGER
PartSelect #: PS18989326
Manufacturer #: 90621578
$6.40
  In Stock
Order now and your part arrives by Jul 20
SA LEVER, SINGLE LINE, 12 – Part Number: 90567077
SA LEVER, SINGLE LINE, 12
PartSelect #: PS18988538
Manufacturer #: 90567077
This is a genuine Black and Decker replacement part, it is sold individually. The purpose of the 90567077 Lever Assembly, is to regulate the amount of line that is fed from the auto-feed spool. This ...
$6.40
  In Stock
Order now and your part arrives by Jul 20
SPRING, SPOOL COVER – Part Number: 90566944
SPRING, SPOOL COVER
PartSelect #: PS18988535
Manufacturer #: 90566944
Genuine Black and Decker replacement part, this item is sold individually. The purpose of the 90566944 Spring is to hold the spool in place on the Trimmer shown below. It is placed between the spool a...
$6.40
  In Stock
Order now and your part arrives by Jul 20
AUX HANDLE – Part Number: 90625191
AUX HANDLE
PartSelect #: PS18989374
Manufacturer #: 90625191
$7.55
  In Stock
Order now and your part arrives by Jul 20
SA SPOOL AND LINE, 25FT, SINGL – Part Number: 90626046
SA SPOOL AND LINE, 25FT, SINGL
PartSelect #: PS18989378
Manufacturer #: 90626046
$17.63
  In Stock
Order now and your part arrives by Jul 20
SA GUARD 13, LST136 – Part Number: 90567871N
SA GUARD 13, LST136
PartSelect #: PS18988558
Manufacturer #: 90567871N
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...
$16.56
  In Stock
Order now and your part arrives by Jul 20
SPRING, BALE HANDLE BUTTON – Part Number: 90559866
SPRING, BALE HANDLE BUTTON
PartSelect #: PS18988378
Manufacturer #: 90559866
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 ...
$6.40
  In Stock
Order now and your part arrives by Jul 20
SWITCH, MICRO – Part Number: 90569937
SWITCH, MICRO
PartSelect #: PS18988624
Manufacturer #: 90569937
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...
$7.58
  On Order

Questions And Answers for LST140C

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George
August 15, 2022
How do I remove the spool holder from main unit?
For model number LST140C
PartSelect logo
Hello George, Thank you for the question. Her is a link to a How to Video that may help with the repair. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you! https://www.youtube.com/watch?v=73uNYK4L7LA

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Common Symptoms of the LST140C

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Cutting line does not come out
Fixed by
these parts
Fixing
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Engine revs but trimmer head will not turn
Fixed by
these parts
Fixing
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
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 screw 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
Parts Used:
SA GEAR AND SPINDLE, SERV ONLY SA MOTOR AND MOTOR PLATE, SERV SA MOTOR HOUSING
  • Mark from CATOOSA, OK
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
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