Technical Information · issue 34 of 2008
Carburetor Adjustment; Poly V-belt pulley (only TS 410); Clutch, tension spring; Service notes; Summary
IssueTI 34/2008
Part changes (2)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 4238 764 8503 | 4238 764 8505 | Poly V-belt pulley (only TS 410) The basic setting without limiter cap for the high The previous poly V-belt pulley 4238 764 8503 is speed adjustment screw H of carburetor C1Q-S118 being replaced by the new version 4238 764 8505. |
| 1125 160 2005 | 4238 120 0600 | 370TI011 KN and slip speeds and further improvement of acceleration behavior, the previous clutch 1125 160 2005 is being replaced by the new version Carburetor C1Q-S118 – 4238 120 0600 is 4238 160 2001. |
Full text
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STIH)
Technical Information 34.2008
Cut-off machine STIHL TS 410, 420 – Series 4238
Contents
1. Carburetor Adjustment
2. Poly V-belt pulley (only TS 410)
3. Clutch, tension spring
4. Service notes
5. Summary
1. Carburetor Adjustment 2. Poly V-belt pulley (only TS 410)
The basic setting without limiter cap for the high The previous poly V-belt pulley 4238 764 8503 is
speed adjustment screw H of carburetor C1Q-S118 being replaced by the new version 4238 764 8505.
– 4238 120 0600 is being changed. The difference between the new V-belt pulley
The following settings apply: 4238 764 8505 and the previous version
4238 764 8503 is a larger diameter in the area of the
Basic setting without limiter cap on the high belt contact surface.
speed adjustment screw H
Low speed adjustment
screw L: 1 turn open 2.1 Supply of spare parts
High speed adjustment The previous V-belt pulley 4238 764 8503 is no
screw H: 2.5 turns open longer available. The new V-belt pulley
Standard setting with limiter cap on the high 4238 764 8505 can also be used for older
speed adjustment screw H machines.
Low speed adjustment
screw L: 1 turn open
High speed adjustment
screw H: 3/4 turn open (max.
no further than stop)
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)m~ge 2 Technical Information 34.2008
3. Clutch, tension spring 4. Service notes
4.1 Carburetor
370TI014 KN
1 2
For further optimization of the clutch engagement
370TI011 KN
and slip speeds and further improvement of
acceleration behavior, the previous clutch
1125 160 2005 is being replaced by the new version Carburetor C1Q-S118 – 4238 120 0600 is
4238 160 2001. The previous tension spring (1) manufactured with barbed fuel hose connectors
0000 997 5815 with 8 coils is replaced by the new (arrows).
version (2) 0000 997 0912 with 6 coils.
. Observe service notes regarding barbed
connectors (see Chap. 4.4)
3.1 Supply of spare parts
The new clutch 4238 160 2001 can also be used for
4.2 Connector
older machines. The previous clutch 1125 160 2005
remains available for other models.
The new tension spring (2) 0000 997 0912 can also
be used for older machines with the previous clutch
1125 160 2005. The previous tension spring (1)
0000 997 5815 remains available for other models.
3.2 Service note
When performing repairs, the entire clutch should
370TI012 KN
be replaced with the new version. However, if only
replacing tension springs, always replace all
3 tension springs as a set, never just one or two. Connector 4238 353 2701 is manufactured with
Combining previous and new tension springs in the barbed fuel hose connectors (arrows).
same clutch is not permitted.
. Observe service notes regarding barbed
connectors (see Chap. 4.4)
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Technical Information 34.2008 Page 3
4.3 Fuel pump 4.4 Service notes – barbed connectors
To ensure there are no leaks in the fuel system:
. Install and remove fuel hoses, by hand
whenever possible, in order to avoid damage to
the barbed connector – sharp-edged pliers,
screwdrivers, etc., must not be used – nor
should fuel hoses be cut open with a knife or
similar implement
. Do not reuse fuel hoses after disassembly,
always replace them with new hoses – fuel
370TI013 KN
hoses may be over-extended when removed
. Install new fuel hoses dry or with the aid press
Fuel pump 4238 350 6201 is manufactured with fluid OH 723 – 0781 957 9000. Other press
barbed fuel hose connectors (arrows). fluids are not permitted and may lead to fuel
hose damage
. Observe service notes regarding barbed
connectors (see Chap. 4.4) . When using press fluid OH 723, apply press
fluid to the ends of the hose and connectors
prior to installation
Notes regarding press fluid OH 723
Press fluid OH 723 produces a lubricant film to aid
in assembly. The lubricant evaporates after a short
time allowing for a tight fit.
Never use fuel, oil or grease as a lubricant. Fuel, oil
and grease do not evaporate and may allow the
hose to slip from the connector.
TI_34_2008_30_01_01.fm
)m~ge 4 Technical Information 34.2008
5. Summary
Item Part Name Previous New Rem.
1 Poly V-belt pulley (only TS 410) 4238 764 8503 4238 764 8505 1) 2)
2 Clutch; 1125 160 2005 4238 160 2001 2) 3) 4)
including Item 3
other parts as previously, see spare parts list
3 Tension spring 0000 997 5815 0000 997 0912 2) 3) 4)
Modification to be introduced : continuously
Remarks
1) Previous version of part no longer available from factory
2) New version of part can also be used for older machines
3) Previous version of part remains available for other models
4) see “Service Notes”
© ANDREAS STIHL AG & Co. KG 2008 Technical Documentation
D1/MTK-fr
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Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.