Fein FMT250 Setup guide

FMT 250; FMT 250Q; FMT 250QSL
Repair instructions
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2016-11-18
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FMT 250
FMT 250Q / FMT 250QSL

FMT 250; FMT 250Q; FMT 250QSL
Contents
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2016-11-18
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1. Models described
2. Technical data
3. Notes and requirements
4. Tools required
5. Lubricants and auxiliary substances required
6. Disassembly
7. Assembly
8. Troubleshooting
9. Connection diagram

FMT 250; FMT 250Q; FMT 250QSL
1. Models described
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2016-11-18
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These instructions describe how to repair the following models:
Model Order number
FMT 250 7 229 44 .. .. .
FMT 250Q 7 229 43 .. .. .
FMT 250QSL 7 229 53 .. .. .

FMT 250; FMT 250Q; FMT 250QSL
2. Technical data
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Technical data
The complete technical data can be found in the operating instructions for the model.
Test data
Up-to-date test data for all models can be found on the FEIN Extranet (Customer Service → Repair Guides).
Lubricants
The lubricants and container sizes available from FEIN can be found on the FEIN Extranet (Customer Service → Repair Guides).
Lists of spare parts
Lists of spare parts and exploded views are available online at www.fein.com

FMT 250; FMT 250Q; FMT 250QSL
3. Notes and requirements
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Note
These instructions are only intended for persons with suitable technical training. It is assumed that the reader has mechanical and
electrical training.
Only use original FEIN spare parts!
Provisions
Please note that power tools may only be repaired, maintained and checked by a trained electrician, as improper repair can result in
serious risks to the user.
The provisions set out in DIN VDE 0701-0702 should be observed after repairs.
The relevant accident prevention regulations of the employers' liability insurance associations are to be observed when
commissioning.
The German Equipment and Product Safety Act applies for correct use.
Outside Germany, the regulations applicable in the relevant country must be observed!

FMT 250; FMT 250Q; FMT 250QSL
4. Tools required
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Standard tools Special tools
Vice Drawing-off socket cap 6 41 04 150 00 8
Arbor press Chuck cone, 16mm 6 41 07 016 00 1
Plastic hammer Chuck cone, 19mm 6 41 07 019 00 7
Circlip pliers Chuck cone, 26mm 6 41 07 026 00 0
Screwdrivers: Torx 15, Torx 20 Extractor tool
•Thread ring
•Chuck cone
•Screw
•Bolt
6 41 14 031 03 0
6 41 14 031 01 0
6 41 07 013 02 1
6 41 07 013 03 7
Flat-nose pliers
Ball bearing support, 16mm
Ball bearing support, 19mm
Ball bearing support, 26mm
Hot air gun Clamping screw 6 41 07 013 02 1
Punch 5mm, 6mm Press-in fixture 6 41 22 108 00 0
Cross-tip screwdriver (small) Assembly aid 6 41 22 121 01 0

FMT 250; FMT 250Q; FMT 250QSL
5. Lubricants and auxiliary substances required
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Lubricant
Grease 0 40 101 01 00 0 12g Gearbox

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disconnecting from mains
1. Disconnect tool from mains.

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling electronics
1. Remove the three screws (1) and take off cover (2).
2. Unscrew screw (3) and remove cable clamping piece.
3. Remove electronics (4) from motor housing.
4. Disconnect screw connections (5) between motor and electronics.
5. Open the two screws (6) and remove cable with plug.
Tools:
- Torx T15
- Cross-tip screwdriver
(small)
- Flat-nose pliers
1
2
3
4
5
6

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling carbon brushes
1. Raise spring (1) and lift into cut-out (2).
2. Disconnect carbon brushes (3) on both sides and remove.
3. Unscrew the two screws (4) and remove carbon holder.
4. Pull off cables and remove the two connectors (5).
Tools:
- Torx T15
- Assembly aid
1
2
4
5
3

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling armature
1. Unscrew the four screws (1).
2. Pull gearbox housing with armature (2) out of motor housing.
3. Remove air guide ring (3).
Tools:
- Torx T15
1
2
3

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling housing
1. Unscrew two screws (1).
2. Remove stator (2) from housing.
3. Remove the control rod (3).
Tools:
- Plastic hammer
- Torx T15
2
1
3

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling housing
1. Remove slide switch (1).
2. Remove contact spring (2).
3. Pull connecting cables (3) off stator.
1
2
3

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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Disassembling armature
1. Open lever (1).
2. Place extractor tool (2) on armature.
3. Heat tool head (3) with hot air gun [temperature: 600 °C] on right and left sides at an angle of 45 degrees for
15 seconds on each side.
Warning! Too much heat will cause deformation of the fan blades on the armature.
4. Using extractor tool, pull armature (4) out of tool head.
Tools:
- Extractor tool
- Press-in fixture
- Hot air gun
- Vice
2
1
4
3

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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2016-11-18
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling armature
1. Pull off grooved ball bearing (1) on collector side.
2. Remove circlip (2).
3. Pull off grooved ball bearing (3).
4. Pull off bush (4).
5. Remove sealing ring (5).
Tools:
- Circlip pliers
- Chuck cone, 16mm,
19mm
- Plastic hammer
2
3
4
5
1

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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2016-11-18
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling armature
1. Pull ball bearing (1) off armature. Tools:
- Drawing-off socket cap
- Chuck cone, 26mm
1

FMT 250; FMT 250Q; FMT 250QSL
6. Disassembly
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2016-11-18
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling tool head (applies to: FMT 250Q)
1. Drive out straight pin (1) and remove lever (2).
2. Remove eccentric ring (3).
3. Press out the two bushes (4).
4. Unscrew fillister head screw (5).
5. Remove locking spring (6).
Tools:
- Plastic hammer
- Torx T20
- Punch, diameter 5mm
- Punch, diameter 6mm
1
2
3
4
6
5

FMT 250; FMT 250Q; FMT 250QSL
7. Assembly
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Assembling armature
1. Press on grooved ball bearing (1).
2. Press on bush (2).
3. Press on grooved ball bearing (3).
4. Press on grooved ball bearing (4).
5. Insert circlip (5).
Tools:
- Arbor press
- Ball bearing support,
16mm
- Ball bearing support,
19mm
- Ball bearing support,
26mm
- Circlip pliers
1
2
3
4
5

FMT 250; FMT 250Q; FMT 250QSL
7. Assembly
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2016-11-18
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FEIN retains all rights of disposal, such as copying and circulation.
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Assembling tool head (applies to FMT 250Q)
1. Secure locking spring (1) with fillister head screw (2) [2.0 ±0.1Nm].
2. Press in the two bushes (3).
Make sure the bushes are flush with the inside.
3. Insert eccentric ring (4) in correct position into lever.
4. Place lever (5) on tool head.
5. Press in straight pin (6).
Tools:
- Torx T20
- Punch, diameter 5mm
- Punch, diameter 6mm
- Arbor press
1
4
2
3
5
6

FMT 250; FMT 250Q; FMT 250QSL
7. Assembly
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Assembling housing cover
1. Fill tool head with 12g of grease.
2. Align fork centrally in tool head (1).
3. Position armature and align cut-out (2).
4. Press armature into tool head.
5. Test function by turning armature.
Tools:
- Grease 12g
- Hot air gun
- Press-in fixture
- Arbor press
1
2