Technical Information · issue 8 of 2002
Optimized Connection: Engine Housing - Connector -
Model 021, 023, 025 Chainsaws – Series 1123
IssueTI 8/2002
Engine family 1123
Part changes (2)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 1123 640 2900 | 1123 640 2901 | 2 Connector Housing - Connector - Oil Pump The connector 1123 640 2900 has been replaced by connector 1123 640 2901. |
| 1123 021 0800 | 9074 478 4130 | 1123 021 0800 been replaced by spline screw 9074 478 4130 (IS-P5 x 16). |
Full text
Page 1 of 2
Technical Information
08.2002
Model 021, 023, 025 Chainsaws – Series 1123
1. Optimized Connection: Engine 1.2 Connector
Housing - Connector - Oil Pump The connector 1123 640 2900 has been replaced by
connector 1123 640 2901. The new version has a
The connection between the engine housing,
larger throughhole to take the new spline socket
connector and oil pump has been optimized on
head screw.
model 021, 023 and 025 chainsaws.
The only difference between the new and previous
1.1 Engine Housing versions is the diameter of the throughhole:
The bore in the engine housing for the connector
has been modified.
When carrying out repairs, note that the new engine A A
housing may only be used together with the new
connector, and the previous engine housing with the
previous connector.
An index letter (see arrow) is stamped above the
part number to identify the previous and new engine
housings.
135TI040 KN
Index
Previous G
Throughhole "A"
New H
Previous 4.2 mm
The part number is located below the clutch drum
(remove the sprocket cover). New 5.4 mm
The O-ring 9646 945 0350 included in the previous
connector has been replaced on the new version by
O-ring 9646 945 0355. The new O-ring seals
cylindrically over its entire circumference, and not
only under compression as before.
1.3 Spline Socket Head Cap Screw
The spline screw 9075 478 3015 (IS-D4 x 15) has
H
6
1123 021 0800 been replaced by spline screw 9074 478 4130
(IS-P5 x 16).
135TI040 KN
1123 021 0800
The new screw has a larger diameter and a higher
tightening torque for greater security.
Screw Tightening
torque
Previous IS-D4 x 15 2.5 Nm
New IS-P5 x 16 4.0 Nm
TI_08_2002_01_01_01.fm englisch / english
)m~ge 2 Technical Information 08.2002
Summary
Item Part Name Previous New Remarks
1 Connector; 1123 640 2900 1123 640 2901 1)
including item 2
2 O-ring 9646 945 0350 9646 945 0355 1)
3 Screw IS-D4 x 15 9075 478 3015 --- 1)
4 Screw IS-P5 x 16 --- 9074 478 4130 1)
5 Engine housing 1123 020 3005 1123 020 3005 2)
6 Engine housing, easy start 1123 020 3006 1123 020 3006 2)
Modification to be introduced: in progress
Remarks
1) Previous version of part remains available as spare
2) Previous version of part will be supplied from factory only as long as existing stocks last
Last Technical Information on models 021, 023, 025: 42.2000
© 2002 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-ja 7470
TI_08_2002_01_01_01.fm Page 2 of 2
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.