Technical Information · issue 27 of 2010
Air filter, baffle; Muffler; Cooling plate; Manifold, carburetor bracket, preheater plate; Throttle trigger; Summary
IssueTI 27/2010
Engine family 1138
Part changes (6)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 1138 120 4100 | 1138 140 9303 | 2 Baffle The previous baffle 1138 120 4100 and previous O-ring 9645 951 3007 retains the twist lock slotted nut 1138 140 9500 are being replaced by the 1138 140 9303 to the air filter. |
| 1138 140 0651 | 1138 140 0654 | 1 Muffler with spark arresting screen The previous muffler 1138 140 0651 with spark arresting screen 1138 145 8600 is being replaced by version 1138 140 0654 with spark arresting screen 1138 140 8100. |
| 1135 145 9001 | 1135 145 9002 | 2 Plug The previous plugs 1135 145 9001 are being replaced by the stainless steel version 1135 145 9002. |
| 1138 120 0905 | 1138 120 0909 | 2 Carburetor bracket preheater plate The previous carburetor bracket 1138 120 0905 is being replaced by the new version 1138 120 0909. |
| 1138 140 2501 | 1138 140 2504 | The previous manifold 1138 140 2501 is being replaced by the version 1138 140 2504. |
| 1138 122 9500 | 1138 122 9501 | 4 Washer The previous preheater plate 1138 122 9500 is The previous washer 0000 958 0513 is being replaced by the version 1138 122 9501. |
Full text
Page 1 of 7
STIH)
Technical Information 27.2010
Chain saws STIHL MS 441, MS 441 C – Series 1138
Contents
1. Air filter, baffle
2. Muffler
3. Cooling plate
4. Manifold, carburetor bracket, preheater plate
5. Throttle trigger
6. Summary
1. Air filter, baffle
The new filter material is characterized by its oil and
1.1 Air filter
water repellent properties, a filter quality that has
The previous HD filter with prefilter is being replaced over 70% better retention rate compared to
by the new HD2 filter. conventional filter concepts and the fact that it is
very easy to clean. The filter retains its properties
even after countless cleaning cycles. The HD2 filter
material is pleated to achieve a large surface area.
1.1.1 Spare parts/service notes
The new HD2 filter can also be used with older
machines. The previous HD filter (with prefilter) is
available from the factory only as long as existing
stock lasts. The prefilter 0000 141 0300 remains
available as a spare part for the HD filter. The HD2
219TI084 KN
filter is to be used without a prefilter.
– HD2 filter:
Black filter frame, pleated filter material
TI_27_2010_30_01_01.fm englisch / English
)m~ge 2 Technical Information 27.2010
1.1.2 Cleaning the air filter
. Knock out the filter or blow it clear with low psi
compressed air from the inside outwards
In case of stubborn dirt or stuck filter fabric:
. Wash the filter in a clean, non-flammable
cleaning liquid (e. g., warm soapy water) – rinse
the filter from inside to out under a water jet – do
not use high-pressure cleaners
Dry all filter parts – do not expose to extreme heat.
219TI089 KN
1.2 Baffle
The previous baffle 1138 120 4100 and previous O-ring 9645 951 3007 retains the twist lock
slotted nut 1138 140 9500 are being replaced by the 1138 140 9303 to the air filter.
version 1138 120 4102 and twist lock
1138 140 9303. Spare parts/service notes
Baffle 1138 120 4103 is available for machines of
the previous version. It consists of the new baffle
1138 120 4102 and the new twist lock
1138 140 9303.
The new baffle 1138 120 4102 and the new twist
lock 1138 140 9303 are available as individual parts
for new versions of the machines. O-ring
9645 951 3007 cannot be combined with the
previous slotted nut 1138 140 9500.
219TI085 KN
Top: Previous baffle 1138 120 4100 with
slotted nut 1138 140 9500
Bottom: New baffle 1138 120 4102 with twist lock
1138 140 9303
On the new baffle 1138 120 4102, an M5 threaded
insert is used instead of a threaded stud. The air
filter is fastened to the baffle using twist lock
1138 140 9303.
TI_27_2010_30_01_01.fm Page 2 of 7
Technical Information 27.2010 Page 3
2. Muffler 3. Cooling plate
The previous black painted steel mufflers are being The previous cooling plate 1138 141 3200 is
replaced by stainless steel mufflers. The new replaced by 1138 141 3201.
mufflers increase engine power by 0.1 kW.
The new cooling plate is shorter in height and has a
rib near the top edge.
2.1 Muffler with spark arresting screen
The previous muffler 1138 140 0651 with spark
arresting screen 1138 145 8600 is being replaced
by version 1138 140 0654 with spark arresting
screen 1138 140 8100.
2.2 Plug
The previous plugs 1135 145 9001 are being
replaced by the stainless steel version
1135 145 9002.
219TI086 KN
2.3 Spare parts/service notes
From now on, the previous mufflers are no longer
Left: Previous cooling plate 1138 141 3200
available from the factory.
Right: New cooling plate 1138 141 3201 with
The previous spark arresting screen 1138 145 8600 rib (arrow)
and the previous plugs 1135 145 9001 for the black
painted steel muffler remain available.
Individual parts of the previous black painted steel Spare parts/service notes
mufflers and of the new stainless steel mufflers may The previous cooling plate 1138 141 3200 can only
not be combined with one another. be combined with the previous muffler and will only
The new stainless steel mufflers can also be used remain available from the factory while existing
with older machines. stock lasts..
The new cooling plate 1138 141 3201 can be
combined with the old and new versions of the 1138
mufflers.
TI_27_2010_30_01_01.fm
)m~ge 4 Technical Information 27.2010
4. Manifold, carburetor bracket, 4.2 Carburetor bracket
preheater plate The previous carburetor bracket 1138 120 0905 is
being replaced by the new version 1138 120 0909.
To extend the service life of the manifold at low
The new carburetor bracket has a hole that has
temperatures, the wall of the mixing duct has been
been enlarged by 0.079 in. (2 mm) to 0.83 in.
strengthened. Simultaneously, the carburetor
(21 mm) for the strengthened wall of the new
bracket, preheating plate and washer have been
manifold 1138 140 2504.
adapted to the modified geometry of the manifold.
The carburetor brackets can be identified with the
4.1 Manifold help of the markings and the diameter.
The previous manifold 1138 140 2501 is being
replaced by the version 1138 140 2504. The new b
manifold stands out due to a strengthened wall of
the mixing duct.
The manifolds can be identified with the help of the
markings and the exterior diameter.
XX
1138 120 XX
a
219TI091 KN
1138/XX Marking Diameter (b) Part number to
use for service
219TI090 KN
1138 120 0903 0.75 in 1138 007 1006
(19 mm) (b 4.5)
1138 120 0907 0.83 in. 1138 120 0909
(21 mm)
Marking Diameter (a) Part number to
use for service
1138/01 0.98 in. (25 mm) 1138 007 1006
The previous carburetor bracket 1138 120 0905 will
(b 4.5)
only remain available from the factory while existing
1138/04 1.06 in. (27 mm) 1138 140 2504 stock lasts. The manifold kit 1138 007 1006 is
available for machines of the previous version.
The previous manifold 1138 140 2501 is no longer
available from the factory. The manifold kit
1138 007 1006 is available for machines of the
previous version.
TI_27_2010_30_01_01.fm Page 3 of 7
Technical Information 27.2010 Page 5
4.3 Preheater plate 4.4 Washer
The previous preheater plate 1138 122 9500 is The previous washer 0000 958 0513 is being
replaced by the version 1138 122 9501. The new replaced by the version 0000 958 0528. The new
preheater plate has a hole that has been enlarged washer is characterized by a smaller exterior
by 0.079 in. (2 mm) to 1.10 in. (28 mm). diameter and reduced thickness.
The preheater plate can be identified with the help The washer can be identified by the thickness and
of the markings and the diameter. the diameter.
t d
C
219TI093 KN
219TI092 KN
Marking Diameter (c) Part number to Thickness (t) Diameter (d) Part number to
use for service use for service
1138 122 9500 1.02 in. 1138 122 9501 0.079 in. 0.39 in. 0000 958 0513
(26 mm) (2 mm) (10 mm)
1138 122 9501 1.10 in. 1138 122 9501 0.039 in. 0.31in. 0000 958 0528
(28 mm) (1 mm) (8 mm)
Spare parts/service note The previous washer 0000 958 0513 can only be
combined with the previous carburetor bracket,
The previous preheater plate 1138 122 9500 can
preheater plate and manifold and is still available.
only be combined with the previous carburetor
bracket and the previous manifold. The previous The new washer 0000 958 0528 can only be
preheater plate 1138 122 9500 will only remain combined with the new carburetor bracket,
available from the factory while existing stock lasts. preheater plate and manifold.
The new preheater plate 1138 122 9501 can be
combined with the old and new carburetor brackets
and manifolds.
TI_27_2010_30_01_01.fm
)m~ge 6 Technical Information 27.2010
4.5 Manifold kit 5. Throttle trigger
The manifold kit 1138 007 1006 is available for From now on, there will be a side opening on the
machines of the previous version. throttle trigger 1138 182 1000.
This kit consists of:
The part number of the throttle trigger remains
unchanged. The new throttle trigger can also be
4 3 2 1 used with older machines.
219TI087 KN
219TI088 KN
1 1138 140 2504 Manifold
2 1138 120 0909 Carburetor bracket
3 0000 958 0528 Washer
Left: Previous geometry
4 1138 122 9501 Preheater plate
Right: New geometry with side opening
When older machines are serviced, the manifold,
carburetor bracket, washer and preheater plate
must always be replaced as a set.
TI_27_2010_30_01_01.fm Page 4 of 7
Technical Information 27.2010 Page 7
6. Summary
Item Part Name Previous New Rem.
1 HD air filter 0000 120 1654 --- 1)
2 Prefilter 0000 141 0300 --- 2)
3 HD2 air filter --- 0000 140 4402 3)
4 Manifold 1138 140 2501 1138 140 2504 4) 5)
5 Carburetor bracket 1138 120 0905 1138 120 0909 1) 5)
6 Preheater plate 1138 122 9500 1138 122 9501 1) 3) 5)
7 Washer 0000 958 0513 0000 958 0528 2) 5)
8 Manifold kit; includes Items 4, 5, 6, 7 --- 1138 007 1006 5) 6)
9 Baffle 1138 120 4100 1138 120 4102 1) 5)
10 Slotted nut 1138 140 9500 --- 2)
11 Twist lock --- 1138 140 9303
12 O-ring --- 9645 951 3007
13 Baffle; including Items 9, 11, 12 --- 1138 120 4103 5) 6)
14 Muffler with spark arresting screen;
including Items 15, 16 1138 140 0651 1138 140 0654 3) 7)
15 Spark arresting screen 1138 145 8600 1138 140 8100 2) 7)
16 Plug 1135 145 9001 1135 145 9002 2) 7)
17 Cooling plate 1138 141 3200 1138 141 3201 1) 4)
Modification to be introduced: continuously
Remarks
1) Previous version of part will be supplied from factory only as existing stock lasts
2) Previous version of part remains available for older models
3) New version of part can also be used for older machines
4) Previous version of part is no longer available from factory
5) See “Service notes“
6) New kit version of part for repair of older machines
7) New version of part in stainless steel
© ANDREAS STIHL AG & Co. KG, 2010 Technical Documentation
D1/MTK-bl
TI_27_2010_30_01_01.fm Page 5 of 7
Page 6 of 7
Page 7 of 7
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.