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REPAIR GUIDELINE

String Trimmer_ST1300E

Version: 1

Issue Date: 02//2016

Table of Contents

2

NO.

Contents

Page

1

Troubleshooting

3

2

Tool list

4

3

Part 1: Replace the motor assembly

5-26

4

Part 2: Replace the PCBA

27-37

Troubleshooting

3

Problem

Possible Cause

Fault

Position

Test & Solution

Not feed line

Poor cutting line

Trimmer line

Replace the cutting line. (e.g. 2 mm

nylon line)

Fail to start

The cables that connect to motor are

loosed or fallen off from motor.

Motor

Open the motor housing, check the

cable connection with motor.

Motor is burned

Motor

If the cables are well connected, check

the motor and test with a new motor.

PCBA is broken

PCBA in rear

housing

If the cables are well connected, and

motor is functional, replace the PCBA in

the rear housing.

The battery pack is not

stayed/locked on the

trimmer properly; or hard to

remove from the trimmer.

The locking mechanism is worn.

Rear housing

Replace the rear housing set.

The motor speed varies up

and down when the

trimmer works.

Motor was burned due to overload

Motor

Replace the motor

Tool List For Repair

4

NO.

Tool List

SPEC

Remark

1

Magnetic bits

#1 , #2 phillips

2

Socket wrench

13mm

3

Hex wrench

M5

4

Electric soldering iron

5

Heat gun

6

Heat shrinkable sleeves

7

Scissor

To remove the shrinkable sleeve

5

Part 1: Replace the Motor Assembly

1. Stop the motor and remove the battery pack from the string trimmer.

2. Loosen the two combination screws in the guard with the M5 hex wrench, remove the guard from the

shaft base.

Description

Part Number

Guard assembly

2824273001

Combination screws

5620526001

Replace the Motor

6

Combination screws

Guard

assembly

Combination

screws

Spool retainer

Spool

3. Press the two release tabs on the trimmer head base, pull the spool and spool retainer out.

7

Replace the Motor

Description

Part Number

Spool

2824055002

Spool Retainer

2824019002

Release tab

8

Replace the Motor

4. Hold the bump knob and pull it straight out. Remove the bump knob, compression spring and

washer from the trimmer head base.

Description

Part Number

Bump Knob

2824022001

Compression Spring

3660582001

Washer

5650349002

PULL

Compression spring

Washer

Trimmer head

base

Bump knob

9

Replace the Motor

5. Wear gloves and hold the trimmer head base with one hand, use a 13mm manual socket wrench

to turn the hexagon nut counterclockwise to loosen it.

Hexagon nut

10

Replace the Motor

6. Hold the trimmer head base and pull it straight out from the motor shaft, remove the flange

from the base.

Description

Part Number

Outer Flange

3520800001

Hexagon Nut

5630271001

Trimmer Head Base

2824082003

Hexagon nut

Trimmer head base

Motor shaft

Outer flange

Pull