Technical Information · issue 2 of 1996
Crankshaft with larger big end bearing; new crankc
Model 066 Chainsaws - Series 1122
Part changes (7)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 1122 030 0407 | 1122 030 0408 | Crankshaft 1122 030 0407 will be replaced by version 1122 030 0408 from machine number X 33 917 066. |
| 1122 020 2102 | 1122 020 2103 | Crankcase 1122 020 2102 will be replaced by version 1122 020 2103. |
| 1122 400 1311 | 0000 400 1303 | The original version 1122 400 1311 has been deleted and replaced by version 0000 400 1303. |
| 1122 404 3500 | 1128 404 3501 | The original version 1122 404 3500 will be replaced by version 1128 404 3501. |
| 1122 440 3008 | 1122 440 3009 | Wiring harness 1122 440 3008 (version for carb heating) will be replaced by wiring harness 1122 440 3009. |
| 1122 790 1712 | 1122 790 1713 | The original front handle 1122 790 1712 has been replaced by the version 1122 790 1713. |
| 1122 790 3604 | 1122 790 3607 | The original wrap-around handle 1122 790 3604 has been replaced by the version 1122 790 3607. |
Full text
Page 1 of 4
Technical Information
02.96
Model 066 Chainsaws - Series 1122
&RQWHQWV
1. Crankshaft (larger big end bearing) / 3. Wiring harness
crankcase 4. Electric handle heating
2. Ignition system (lightweight flywheel, 5. Summary
ignition module, generator)
1.1=Crankshaft= =Wrap handle only
Crankshaft 1122 030 0407 will be replaced by
version 1122 030 0408 from machine number
X 33 917 066K=qhe new crankshaft (1122 030 0408)
features a larger big end bearing and is approx.
4 mm (0.16 in) longer than the original version.
M10
The diameter at the taper has been changed from
13.5 mm to 15.0 mm (0.53 to 0.6 in).
137TI013 KN
The thread at the ignition end has been changed
15,0 mm
from M 8 to M 10.
0.6 in dia
1.2=Crankcase= =Wrap handle only
The crankcase has been modified in connection
with the above-mentioned changes.
Crankcase 1122 020 2102 will be replaced by
version 1122 020 2103. The difference between
the original and new version of the crankcase is
the greater distance between the bearings.
The seat for the oil seals has been enlarged.
Oil seal BS 13.5x20x4 will be replaced by version
137TI016 KN
BS 15x22x4. Furthermore, the seat for the
generator has been changed.
Crankcase 1122 020 2102
This line modification does not apply to the
066 Magnum with standard flush-cut handle bar
at this time.
Note:====original parts can not be intermixed with
=========the new version of parts when
performing repairs.
137TI012 KN
Crankcase 1122 020 2103
)Technical Information 02.96 - Page 2
2.=Ignition system =Wrap handle only
2.1=Flywheel
A lightweight flywheel will be installed in future to
further enhance performance.
The lightweight flywheel comprises:
1 Steel hub 2
2 Polymer blades
3 Magnesium bushing for starter pawl
4 High performance magnets
This composite construction has enabled the 1
weight of the flywheel to be reduced by approx. 3
15%.
The reduction in mass means there is less 4
mechanical load on the crankshaft. A universal
ignition module and a generator with a higher
output will be installed (in model 046 too) to
coincide with the introduction of the lightweight
137TI014 KN
flywheel.
Note:=====the new flywheel can only be used in
==========conjunction with the new crankshaft
==========and new crankcase.====================================fo
2.2.=Ignition module
The ignition module has been modified to suit the
special characteristics of the lightweight flywheel.
The original version 1122 400 1311 has been
deleted and replaced by version 0000 400 1303.
All features of the new ignition module are the
same as those of the well-known EY-V module.
See TI 51.94 in this connection. The new version
can be identified by the red ground wire (see
arrow) instead of the black wire of the original
version.
Service note
137TI017 KN
The new version of the ignition module must not
be combined with the original flywheel and vice
versa since this could cause starting problems or
running problems at idle speed.
It is essential to maintain an air gap of ≤0.5 mm
(≤0.020 in) on the new ignition module. If the air
gap is not set properly, the switching threshold will
be displaced upwards and may make it impossible
to start the machine.
2.3.=Generator
A more powerful generator will be installed in
connection with the modification described under
item 2.1. The original version 1122 404 3500 will
be replaced by version 1128 404 3501. This
generator allows a combination of handle heating
and carburetor heating.
)Technical Information 02.96 - Page 3
3.===Wiring harness
Wiring harness 1122 440 3008 (version for carb
heating) will be replaced by wiring harness
1122 440 3009. The new version can be used in
machines with both handle heating DQG carburetor
heating. Wiring harness 1122 440 3008 remains avai-
lable for machines up to NoK=X 33 917 065
Wiring harness 1122 440 3007 will continue to
137TI015 KN
be used for machines equipped only with handle
heating.
4.=Electric handle heating
4.1=Front handle =version with handle heating
The original front handle 1122 790 1712 has been
replaced by the version 1122 790 1713. The heating
element installed in the new front handle has a
higher electrical resistance (see also item 4.3).
4.2=Wrap-around handle =version with handle
and carburetor heating
The original wrap-around handle 1122 790 3604 has
been replaced by the version 1122 790 3607.
The heating element installed in the new version
has a higher electrical resistance (see also item 4.3).
The wrap-around handle 1122 790 3603 will continue
to be used for machines which have neither handle
heating nor carburetor heating.
4.3=Heating elements
Heating elements with a higher electric resistance
will be installed in front handles/wrap-around
handles in the future.
The electric resistance of the heating element in
the rear handle has also been increased. The new
element 1128 434 5000 differs from the original
version in that it has thinner printed conductors which
run in wavy lines.
The resistances in the following table refer to a
132TI003
temperature of +25 °C (77°F).
Left: Original heating element
Right: New heating element
Original version New version
Front handle 1.44 - 1.76 Ω 6.3 - 7.7 Ω
heating element
Rear handle 0.225 - 0.275 Ω 0.9 - 1.1 Ω
heating element
)Technical Information 02.96 - Page 4
Service notes
• If the new flywheel 1122 400 1218 is installed in a saw up to machine number X 33 917 065 , the heating
element 1128 434 5000 must be bonded in the rear handle. Furthermore, the new version of the front
handle/wrap-around handle has to be fitted in place of the original version. The different front handles
can be identified by the resistance of the heating element - see table above. A machine with the original
front handle/wrap-around handle or the original heating element 1125 434 5000 and the new flywheel
1122 400 1218 must not be run at full throttle for more than about 4 minutes at a time since the heating
elements might otherwise burn out.
• The original front handle/wrap-around handle and the original heating element 1125 434 5000 may only
be used in saws with flywheel 1122 400 1216.
5.=====Summary
Item Part Name Original New Rem.
version version
see chapter 1:
1 Crankcase 1122 020 2102 1122 020 2103 1,2)
2 Crankshaft 1122 030 0407 1122 030 0408 2,3)
3 Oil seal BS 13.5x20x4 9640 003 1355 ---
4 Oil seal BS 15x22x4 --- 9640 003 1560 2,3)
see chapter 2:
5 Flywheel 1122 400 1214 1122 400 1217 1)
6 Flywheel (handle heating, VH) 1122 400 1216 1122 400 1218 1)
7 Collar nut M 8x1 0000 955 0802 --- 3)
8 Nut M 8x10
--- 9211 260 1340
9 Ignition module 1122 400 1311 0000 400 1303 1)
10 Generator 1122 404 3500 1128 404 3501 1)
11 Spline screw IS-M 3.5x12 9041 216 0540 ---
12 Spline screw IS-M 4x12 --- 9022 313 0660
see chapter 3:
13 Wiring harness 1122 440 3008 1122 440 3009 1)
see chapter 4:
14 Front handle (handle heating) 1122 790 1712 1122 790 1713 1)
15 Wrap-around handle (heating, VH) 1122 790 3604 1122 790 3607 1)
16 Heating element 1125 434 5000 1128 434 5000 1)
Modification to be introduced from machine number X 33 917 066
5HPDUNV
1) Original version of part remains available as spare for older machines
2) This modification will be introduced on the 066 Magnum Flush cut version at a later date
3) Original version of part remains available as spare for older machines and model 064
Last Technical Information
on model 066: 27.95
Andreas Stihl - D1/MTK-al
1996 Andreas Stihl Technical Documentation 5742 Page 2 of 4
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