Fein WSG 8-115 A Setup guide

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
Repair instructions
C-SC_CSSM
Version 1.1
2017-03-03
All rights reserved by FEIN, especially in case of industrial rights registration.
FEIN retains all rights of disposal, such as copying and circulation.
Page 1of 53

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
Contents
C-SC_CSSM
Version 1.1
2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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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. Connection diagram

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
1. Models described
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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These instructions describe how to repair the following models:
Model Order number
WSG 8-115 (A) 7 222 01 .. .. .
WSG 8-125 (A) 7 222 02 .. .. .
WSG 11-125 (A) 7 222 03 .. .. .
WSG 11-150 (A) 7 222 04 .. .. .
WSG 12-125P (A) 7 222 05 .. .. .
WSG 17-125P 7 222 07 .. .. .
WSG 17-125PQ 7 222 08 .. .. .
WSG 17-125PS 7 222 09 .. .. .
WSG 17-125PSQ 7 222 10 .. .. .
WSG 17-150P 7 222 11 .. .. .
WSG 17-150PQ 7 222 12 .. .. .
WSG 17-70Inox 7 222 13 .. .. .
WSG 15-125P (A) 7 222 24 .. .. .

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
1. Models described
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Model Order number
WSG 8-115 (B) 7 222 28 .. .. .
WSG 8-125 (B) 7 222 29 .. .. .
WSG 11-125 (B) 7 222 30 .. .. .

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
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

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
3. Notes and requirements
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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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 provisions applicable in the relevant country must be observed!

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
4. Tools required
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Standard tools Special tools
Plastic hammer Drawing-off socket cap 6 41 04 150 00 8
Slotted screwdriver (small) Chuck cone, 19 mm 6 41 07 019 00 7
Torx screwdriver T15; T20 Chuck cone, 26 mm 6 41 07 026 00 0
Punch Drawing-off plate 6 41 02 069 00 7
Arbor press Pipe 6 41 01 002 00 4
Ball bearing support 19 mm; 26 mm Assembly aid 6 41 22 121 01 0
Sleeves
•35 mm inner diameter
•14 mm inner diameter
19 mm outer diameter
•30 mm inner diameter
42 mm outer diameter
•15 mm inner diameter
20 mm outer diameter
•15 mm inner diameter
27 mm outer diameter
Pressure piece 6 41 22 003 00 0
4x round material Diameter 20 mm;
length = 60 mm

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
5. Lubricants and auxiliary substances required
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Lubricants
WSG 8-115 (A); WSG 8-125 (A); WSG 11-125 (A); WSG 11-150 (A); WSG 12-125P (A); WSG 17-125P (A)
Grease 0 40 101 01 00 4 21 g Gearbox
WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
Grease 0 40 101 01 00 4 29 g Gearbox
Auxiliary substances
Loctite 573 Compensating disc

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
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Disassembling housing cover
1. Unscrew two screws (1) and take off bottom part of cover (2). Tools:
- Torx T15
1
2

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Speedy mains cable replacement
1. Unscrew screw (1) and remove cable clamp (2).
2. Pull off cover (3).
3. Slide hook (4) into opening (5).
4. Turn hook and take out cable (6).
5. Turn hook and take out cable (7).
6. Remove cable (8) with plug
Tools:
- Torx T15
- Assembly aid
3
4
6
7
1
2
8
5

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling switch (applies to: WSG 8; WSG 11)
1. Unscrew screw (1) and remove cable clamping piece (2).
2. Unscrew two screws (3) and take off upper part of cover (4).
3. Slide switch (5) out of holder.
Tools:
- Torx T15
5
4
2
3
1
5
230V variant
120V variant
5
110V variant

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling switch (applies to: WSG 8-115; WSG 11)
1. Open rubber cover (1).
2. Open spring clips by turning with a small slotted screwdriver.
3. Remove the four stranded wires (2).
Tools:
- Slotted screwdriver
(small)
1
2

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
All rights reserved by FEIN, especially in case of industrial rights registration.
FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling switch (applies to: WSG 12; WSG 17)
1. Unscrew screw (1) and remove cable clamping piece (2).
2. Unscrew two screws (3) and take off upper part of cover (4).
3. Slide switch (5) out of holder.
Tools:
- Torx T15
5
4
2
3
1
5
230V variant
120V variant
110V variant
5

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
All rights reserved by FEIN, especially in case of industrial rights registration.
FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling switch (applies to: WSG 12; WSG 17)
1. Lift hook (1) on both sides of switch and pull off electronics (2).
2. Open rubber cover (3).
3. Open spring clips by turning with a small slotted screwdriver.
4. Remove the four stranded wires (4).
Tools:
- Slotted screwdriver
(small)
2
4
3
1

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
All rights reserved by FEIN, especially in case of industrial rights registration.
FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling stator
1. Pry tension spring (1) off carbon brush (2).
2. Pull out carbon brush (2).
3. Unscrew the screw (3).
4. Remove the lever (4).
5. Remove the disc (6).
6. Remove the spring (5).
Tools:
- Assembly aid
- Torx T20
1
2
4
5
6
3

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling stator
1. Unscrew the four screws (1).
2. Pull gearbox housing (2) with armature out of housing. Tools:
- Assembly aid
- Torx T15
1
2

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
All rights reserved by FEIN, especially in case of industrial rights registration.
FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling stator
1. Remove air guide ring (1).
2. Lift up slide switch (2) and remove.
3. Remove two carbon bushes holders (3).
4. Pull out control rod (4).
1
2
3
4

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling stator
1. Remove stator (1). Tools:
- Plastic hammer
1

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling armature
1. Use a plastic hammer to remove armature (1).
2. Remove bearing bush (2).
3. Remove bevel pinion (3).
Tools:
- Plastic hammer
- Punch
- Arbor press
- Drawing-off plate
6 41 02 069 00 7
- Pipe
6 41 01 002 00 4
3
2
3
1

WSG 8-115 (A)/(B); WSG 8-125 (A)/(B); WSG 11-125 (A)/(B); WSG 11-150 (A)/(B); WSG 12-
125P (A)/(B); WSG 17-125P; WSG 17-125PS; WSG 17-150P; WSG 17-70Inox
6. Disassembly
C-SC_CSSM
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2017-03-03
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FEIN retains all rights of disposal, such as copying and circulation.
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Disassembling armature
1. Remove grooved ball bearing (1).
2. Remove plate (2).
3. Remove grooved ball bearing (3).
4. Pull off magnet (4).
The plastic sleeve is included in the following tool types: WSG 12; WSG 15
The magnet is destroyed during disassembly and has to be replaced.
Tools:
- Drawing-off socket cap
6 41 04 150 00 8
- Chuck cone, 26 mm
6 41 07 026 00 0
- Chuck cone, 19 mm
6 41 07 019 00 7
3
1
2
4