Technical Information · issue 4 of 1999

020, 020 T: Air filter; Chain sprocket/worm; Muffl

Model 020 T Chainsaws - Series 112

Part changes (1)

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Technical Information

                                                                                                         04.1
Model 020 T Chainsaws  -  Series 112

&RQWHQWV
1. Air filter (020 T)
2. Chain sprocket / worm
   (0.325”, 7-tooth)
3. Service note: WT 326 carburetor

1.=====Air filter =020 T
                                                     142TI008 KN

                                                                                                                        142TI000 KN
The air filter and filter base will be modified in                 The filter base has been revised to prepare it for
connection with future changes to the carburetor.                  future changes (compensator) (see illustration).
Air filter 1129 120 1606 will be replaced by the
version 1129 120 1607.
The top right-hand window is closed off on the new
versions of the air filters (see shaded area in
illustration).

6XPPDU\
Item     Part Name                                           Previous              New                     Remarks
 1       Air filter (fleece)                                 1129 120 1606         1129 120 1607           1)
 2       Filter base                                         1129 120 3400         1129 120 3400           2)

Modification to be introduced: in progress
5HPDUNV
1) Original version of part no longer available from factory
2) Only modified version of part is available from factory

TI_04_1999_30_02.fm
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Page 2===========================================================================qechnical Information  04.1

2.=====Chain sprocket / worm 
       0.325´, 7-tooth
The introduction of an 0.325”, 7-tooth chain                    Chain sprocket/worm 1129 640 2052 will be
sprocket means that cutting attachments of this                 supplied as a replacement in future.
pitch can now be run on model 020 T chainsaw.
6XPPDU\
Item     Part Name                                        Previous             New                   Remarks
 1       Chain sprocket/worm 0.325”, 7-tooth;     ---                    1129 640 2052
         including items 2 and 3:
 2       Chain sprocket 0.325”, 7-tooth           ---                    1129 640 2004           1)
 3       Worm 0.325”, 7-tooth                     ---                    1129 640 7105
Modification to be introduced: in progress
5HPDUNV
1) When converting to a different pitch, always replace the chain sprocket together with the matching worm

3.=====Service note: WT 326 carburetor
                                                  142TI010 KN

After repairs to carburetor 1129 120 0606, always
trim away the gasket and metering diaphragm flush
with the carburetor body (see illustration).

Last Technical Information on models 020 T: 43.1998

© 1999 Andreas STIHL AG & Co.                                   Technical Documentation
  Waiblingen                                                    D1/MTK-al                                   6456

                                                                                               TI_04_1999_30_02.fm

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