EGO ST1210E Manuale utente

REPAIR GUIDELINE

String Trimmer_ST1210E

Version: 1

Issue Date: 2015/03/04

Table of Contents

2

NO. Contents Page

1 Troubleshooting 3-4

2 Tool list 5

3 Part 1: Replace the motor 6-19

4 Part 2: Replace the carbon brushes 20-23

5 Part 3: Replace the PCBA 24-34

Troubleshooting

3

Problem Possible Cause Fault

Position Test & Solution

Not feed line Poor cutting line trimmer line

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

round nylon line or 2mm Hitachi twist

line)

Lose 50% of the RPM when

actually cutting

It’s overload of the motor. It usually

caused by the too long line (user did

not mount the guard when operating

the trimmer), or too heavy line (line

diameter exceeding 2.0mm), or using

as an edger by the user.

trimmer line

Mount the guard on the string trimmer,

then release the line and test the speed.

If thicker line was used, replace with

2.0mm line and test the speed.

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.

Troubleshooting

4

Problem Possible Cause Fault

Position Test & Solution

The motor speed varies up

and down when the

trimmer works.

Motor was burned due to overload motor Replace the motor

The carbon brushes were short Carbon brush Replace the carbon brushes.

Tool List For Repair

5

NO. Tool List SPEC Remark

1 Magnetic bits #1 phillips

2 Magnetic bits #2 phillips

3 Socket wrench 13mm

4 Electric soldering iron

5 Heat gun

6 Heat shrinkable sleeves

7 Scissors To remove the shrinkable sleeve

6

Part 1: Replace the Motor

1. Remove the guard and bumper protector from the motor housing.

Description Part Number SPEC

Guard Assembly 2824054000

Bumper protector 3650148000

Replace the Motor

7

bumper

protector

guard

8

Replace the Motor

2. Press the release tabs to remove the spool and spool retainer.

Release tab spool

Spool retainer

Description Part Number

Spool 3127635000

Spool retainer 2824019000

9

Replace the Motor

9

3. Hold the bump knob and pull it straight out, remove the bump knob, compression spring,

washer from the trimmer head base.

compression spring

washer

Trimmer head base

PULL

Description Part Number

Bump knob 2824022000

compression spring 3660582000

bump knob

10

Replace the Motor

4. 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 and remove it.

hexagon nut

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