Technical Information · issue 1 of 2001
USG, HOS: Motor Arm and Handle; Guard Plate; Eye S
IssueTI 1/2001
Full text
Page 1 of 4
Technical Information
01.2001
STIHL USG and STIHL HOS Universal Grinders
Contents
1. Motor Arm and Handle
2. Guard Plate
3. Debris Deflector
4. Diamond Dressing Attachment
5. Swivelling Tool Rest for Hedge Trimmer Blades
1. Motor Arm and Handle
The handle (3) has been moved from the motor itself
to the motor arm (1) to improve ergonomics and
leverage. This has necessitated a slight
modification of the casting and the provision of an
1
additional M 10 tapped hole.
The set of accessories now includes the M 10x145
stud (5) and two M 10 nuts (6).
Two additional 4.2 mm diameter holes are provided 5
on the motor arm for mounting a debris deflector
now included with the USG and HOS (see chapter
3).
6
3
523TI000 KN
Summary
Item Part Name Previous New Remarks
1 Motor arm (USG) 5203 750 1700 5203 750 1701
2 Motor arm (HOS) 5202 750 1700 5202 750 1701
3 Hex head screw M 10x25 9008 319 2390 --- 1)
4 Stud M 10x145 --- 0000 953 1600
5 Hexagon nut M 10 (2 x) --- 9210 260 1300
Modification to be introduced: in progress
Remarks
1) Previous version of part remains available for older machines in handle kit (5203 007 1006)
TI_01_2001_01_30_01.fm english / USA
)m~ge 2 Technical Information 01.2001
2. Guard Plate
The guard plate (1) on the side of the USG and HOS
has been modified. 2
The new guard plate covers the complete grinding 1
3
wheel mounting as well as the upper half of the
grinding wheel.
A comparison with the previous version (top) clearly
shows the changes to the new guard plate. 2
In order to standardize parts, the previous wing 3
screws (2) and washers (3) have been replaced by
4 1
slotted pan head screws (4).
523TI001 KN
Summary
Item Part Name Previous New Remarks
1 Guard plate 5202 757 0600 5203 757 0600
2 Wing screw M 5x12 (2 x) 9157 691 0960 ---
3 Washer A 5.3 (2 x) 9291 021 0120 ---
4 Pan head screw M 5x10 (2 x) --- 9041 216 0950
Modification to be introduced: in progress
TI_01_2001_01_30_01.fm Page 2 of 4
Technical Information 01.2001 Page 3
3. Debris Deflector
The transparent deflector (2) – previously fitted on
the diamond dressing attachment – will now be
included in the set of accessories supplied with the
USG and HOS grinders.
A third hole is provided in the deflector for mounting
it to the motor arm of the USG or HOS. This does not
affect the way it is mounted to the diamond dressing
attachment.
The deflector (2), two M 4x12 pan head screws (3) 3
and two M 4 hexagon nuts (4) have been added to
the set of accessories.
4 2
523TI002 KN
Summary
Item Part Name Previous New Remarks
1 Debris deflector 5202 757 8900 5203 757 8900
2 Pan head screw M 4x12 (2 x) --- 9041 319 0660
3 Hexagon nut M 4 (2 x) --- 9210 260 0600
Modification to be introduced: in progress
4. Diamond Dressing Attachment
In order to standardize parts, shorter slotted pan Remove the standard deflector from the USG or
head screws (4) are used to mount the modified HOS before mounting the diamond dressing
deflector (5) on the diamond dressing attachment. attachment.
Summary
Item Part Name Previous New Remarks
1 Diamond dressing attachment; 5203 890 4400 5203 890 4400
including items 2 to 5:
2 Pan head screw M 4x16 (2 x) 9041 319 0680 ---
3 Washer A 4,3 (2 x) 9291 021 0100 ---
4 Pan head screw M 4x12 (2 x) --- 9041 319 0660
5 Debris deflector 5202 757 8900 5203 757 8900
Modification to be introduced: in progress
TI_01_2001_01_30_01.fm
)m~ge 4 Technical Information 01.2001
5. Swivelling Tool Rest
for Hedge Trimmer Blades
A minor modification has been made to the limit stop
on the existing swivelling tool rest for grinding STIHL 431 2
hedge trimmer blades.
The previous stop screw (2), O-ring (3) and hexagon
nut (4) have been replaced by a special hex head
screw (5) with a threadlocking coating that helps
prevent unintentional loosening.
The handle kit is required for mounting this modified
swivelling tool rest for hedge trimmer blades to older
523TI003 KN
USG grinders.
523TI004 KN
Summary
Item Part Name Previous New Remarks
1 Limit stop; 5203 750 8300 5203 750 8300
including items 2 to 5:
2 Screw IS M 6x18 9022 341 1310 ---
3 O-ring 6x2 9645 945 7464 ---
4 Hexagon nut M 6 9210 319 0900 ---
5 Hex head screw M 6 with --- 0000 677 9101
threadlocking coating
6 Handle kit; 5203 007 1006 5203 007 1006 1)
including items 7 and 8:
7 Bracket 5203 750 8400 --- 1)
8 Hex head screw M 10x12 9008 319 2320 --- 1)
Modification to be introduced: in progress
Remarks
1) Previous version of part remains available for older machines
Last Technical Information on STIHL USG and STIHL HOS: 15.1991
© 2000 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-kr 7115
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