Technical Information · issue 29 of 1995
Hand guard; carburetor; engine housing; chain spro
Model 021, 023, 025 Chainsaws=- Series 1123
IssueTI 29/1995
Engine family 1123
Full text
Page 1 of 4
Technical Information
29.95
Model 021, 023, 025 Chainsaws=- Series 1123
&RQWHQWV
1. Hand guard 023 L (longer mounting screw)
2. Carburetor 023 L (WT 360, WT 396)
3. Engine housing (scope of supply, service note on quick chain tensioner)
4. Standard chain sprocket cover (metal rings)
5. Decompression valve (leakage test, locking strip)
1.=Hand guard 023 L
The original 5 x 24 mm spline screw at the fan side
of the hand guard will be replaced by the longer
version 5 x 32 mm.
Service note=======================================================PO=mm
• The longer 5 x 32 mm screw should be (1.25 inch)
installed in all 023 L machines brought in for
repair.
Tightening torque 3.7 Nm (2.8 lbf.ft).
135TI022 SC
6XPPDU\
Item Part Name Original New Rem.
version version
Spline screw 5 x 24 mm 9075 478 4155 --- 1)
Spline screw 5 x 32 mm --- 9075 478 4165
Modification to be introduced: in progress
5HPDUNV
1) Original version of part remains available as spare
)Technical Information 29.95 - Page 2
2.=Carburetor 023 L
Depending on the market, either the WT 360 or WT 396 carburetor will be installed in 023 L saws.
The carburetors are equipped with different fixed jets:
Item Part Name Part No. Rem.
Carburetor WT 360; 1123 120 0611 1)
including item 1:
1 Fixed jet 0.48 1123 121 5630 1)
Carburetor WT 396; 1123 120 0613
including item 2:
2 Fixed jet 0.46 1123 121 5631
5HPDUNV
1) Existing part
3.=====Engine housing
3.1.===Scope of supply changed======================================fo=========N
In future, engine housings will be supplied 4 3
2
complete with oil and fuel filler caps in order to 5
2
avoid the risk of their threads being damaged
during shipment.
135TI023 SC
6XPPDU\
Item Part Name Original New Rem.
version version
Standard engine housing; 1123 020 3005 1123 020 3005 1) 2)
including items 1 to 5
Easy start engine housing; 1123 020 3006 1123 020 3006 1) 2)
including items 1 to 5:
1 Filler cap; --- 0000 350 0510 2)
including items 2 and 3:
2 Cord --- 0000 350 0900 2)
3 Sealing ring --- 0000 359 1210 2)
4 Filler cap; --- 0000 350 0520 2)
including items 2 and 5:
5 Sealing ring --- 0000 359 1220 2)
Modification to be introduced: in progress
5HPDUNV
1) Only modified version of part is available from factory
2) Existing part
)Technical Information 29.95 - Page 3
3.2.=====Service note for saws with
=========quick chain tensioner
Replacement engine housings 1123 020 3005
(standard) and 1123 020 3006 (easy start) come
with two collar studs of the same length.
If the engine housing is used for a saw with a
quick chain tensioner, the rear collar stud (1) must
be replaced by a collar screw (2) 1123 664 2402
(see TI 42.94).
1
The collar screw (2) 1123 664 2402 can be
taken from the faulty engine housing or ordered
separately.
2
135TI024 SC
• Use M8 stud puller 5910 893 0501 to
unscrew the rear collar stud (1) VORZO\
from the replacement engine housing.
Unscrewing the stud too quickly may
damage the thread in the engine housing.
• Remove the collar screw (2) from the faulty =============fo
engine housing.
• Apply a little oil to the thread of the new or
original collar screw (2).
• Position collar screw (2) in hole in replacement
engine housing and rotate it counterclockwise 2
until it drops down slightly. Then screw home
clockwise and tighten down to approx. 8 Nm
(6.0 lbf.ft). The collar of the screw must butt
against the engine housing (like the collar
stud).
135TI025 SC
• Install engine housing as described in the
service manual.
• Remove the spiked bumper 1123 664 0501
from the faulty engine housing and mount it
to the replacement engine housing. Tightening
torque 3.7 Nm (2.8 lbf.ft).
For safety reasons, spiked bumper 1123 664 0501
must be fitted to the engine housing of machines
with a quick chain tensioner. The spikes of this
spiked bumper are longer and help provide better
contact with the wood during cutting.
Left: Spiked bumper 1123 664 0500
135TI011
Right: Version 1123 664 0501 for
quick chain tensioner
)Technical Information 29.95 - Page 4
4.=Standard chain sprocket cover
The standard chain sprocket cover will be made
from a different material in future. Metal rings (see
arrows) will be press-fitted in the area of the collar
studs. The part number remains unchanged.
135TI026 SC
6XPPDU\
Item Part Name Original New Rem.
version version
Chain sprocket cover 1123 640 1705 1123 640 1705 1)
Modification to be introduced: in progress
5HPDUNV
1) Only modified version of part is available from factory
5.=====Decompression valve, service notes
5.1.===Leakage test
Plug 1122 025 2200 must be installed in place of
the decompression valve before performing the
leakage test (see service manual). The decompres-
sion valve can be removed and installed with a
standard commercial 13-mm deep well socket.
Tightening torque 14 Nm (10 ft lbs.).
5.2.===Use locking strip only when
=======decompression valve is closed
The decompression valve must be closed before
the locking strip 0000 893 5903 is inserted in the
spark plug hole. If the decompression valve is left
open, it may be bent by the piston pressing against
the locking strip.
Last Technical Information on models 021, 023,
025: 17.95
Waiblingen, August 7, 1995 Andreas Stihl - D1/MTK-st
1995 Andreas Stihl Technical Documentation Page 2 of 4
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