Technical Information · issue 5 of 2003
Control Handle and Throttle Cable (FS 400, 450, FR
Model FS 350 Clearing Saw – Series 4134
IssueTI 5/2003
Part changes (1)
| Was | Becomes | What the bulletin says |
|---|---|---|
| 4134 180 6701 | 4134 180 6702 | retainer 4134 180 6701 and lower retainer 4134 182 2105) will be replaced by the new retainer 4134 180 6702 and lower retainer 4134 182 2104. |
Full text
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STIH)
Technical Information
05.2003
Model FS 350 Clearing Saw – Series 4134
Model FS 450 Clearing Saw – Series 4128
Contents
1. Control Handle and Throttle Cable (FS 450)
2. Gearhead (FS 350, FS 450)
3. Drive Tube (FS 350)
4. Rewind Starter, Fan Housing, Shroud (FS 450)
5. Clutch (FS 350, FS 450)
1. Control Handle and Throttle Cable
(FS 450)
New control handles and throttle cables will be Control handles
installed from serial number 1 57 798 575 to further
improve functionality.
The new control handles are equipped with an
integral throttle cable adjuster (1). A microswitch is
1
installed in the control handle for switching the
ignition on and off and is operated by the slide
control. The microswitch is permanently connected
to the short circuit wires and is part of the throttle
cable assembly.
398TI028 KN
New control handle
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)m~ge 2 Technical Information 05.2003
The existing control handle will be replaced by the The existing short circuit wire 4128 440 1105
new version: (between the retainer and ignition module) will be
replaced by short circuit wire 4128 440 1101.
Existing control handle
FS 450: 4128 790 1300 The shape of the cable retainer 4128 448 1200 has
been modified to improve routing of the ignition lead
New control handle on the cylinder.
FS 450: 4128 790 1301 Carburetor housing
The part number of the carburetor housing has been
Throttle cables, retainers, short circuit wire changed from 4128 120 0100 to 4128 120 0101
because its shape has been modified in the area of
the throttle cable seat.
1
1.1 Installation
Throttle cable and wires on retainer
256TI009 KN
256TI008 KN
. Push the short circuit wire with connector (1)
Two short circuit wires are the main feature of the
(coming from the ignition module) into the
new throttle cable. They are insulated over their
recess in the "lower retainer".
whole length and run from the microswitch (1) to the
new retainer (2) and the short circuit wire (3). . Push the throttle cable into its seat on the
carburetor housing as far as stop (arrow).
Existing throttle cable
FS 450: 4128 180 1102
New throttle cable
FS 450: 4128 180 1104
The existing retainer 4134 180 6700 (consisting of 2
retainer 4134 180 6701 and lower retainer
4134 182 2105) will be replaced by the new retainer
4134 180 6702 and lower retainer 4134 182 2104.
A washer (A5.3) is fitted under the head of the
retainer’s mounting screw.
256TI010 KN
. Position the throttle cable in the retainer.
. Attach connector (2) of blue short circuit wire to
terminal (3).
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Technical Information 05.2003 Page 3
Slide and throttle cable in control handle
4
7 8
256TI011 KN
398TI037 KN
. Fit the retainer (cover).
. Use IS D5x24 screw and washer to secure . Position the throttle cable in slide (7).
terminal (4) of black ground wire to the top of the
. Press down the sleeve (8) until it snaps into
retainer.
position and the slide with throttle cable and the
corrugated hose in the handle molding as
shown in the illustration.
Microswitch and wires
10
in the control handle
398TI038 KN
. Attach the hooked end sleeve (9) of the throttle
cable to the throttle trigger (10).
Screw the two halves of the handle together, making
sure that the wires are not pinched in the process.
Mount the control handle on the handlebar.
398TI036 KN
6 5
1.2 Adjusting the throttle cable
. Position the microswitch (5) in the inner handle Important: Carry out this adjustment only after the
molding as shown in the illustration. machine has been properly and securely
assembled – the handlebar and control handle must
. Press the ground wire (blue) into the guide be in the normal operating position. Proper
channel (6) first and then the short circuit wire adjustment of the throttle cable is the necessary for
(black). correct operation in the full throttle, starting throttle
and idle positions.
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)m~ge 4 Technical Information 05.2003
398TI039 KN
. Use a screwdriver to push the slide (11) in the
direction of the arrow to the end of the slot.
. Hold down the interlock lever and squeeze the
trigger to the full throttle position – the throttle
cable is now correctly adjusted.
Summary
Item Part Name Previous
New Remarks
FS 450
Control handle; 4128 790 1300 4128 790 1301 1)
including items 1 to 7:
1 Handle, right 4128 790 0300 4128 790 0301 1)
2 Torsion spring --- 4128 182 4502
3 Detent spring 4128 182 4200 4128 182 4201 1)
4 Contact spring 4128 442 1605 --- 1)
5 Contact spring 4128 442 1600 --- 1)
6 Slide --- 4128 793 3000
7 Spring --- 4128 791 3100
All other parts as before
8 Throttle cable 4128 180 1102 4128 180 1104 1)
9 Retainer assembly; 4134 180 6700 --- 1)
including items 10 to 12:
10 Retainer 4134 180 6701 4134 180 6702 1)
11 Retainer, lower 4134 182 2105 4134 182 2104 1)
12 Screw IS-D5x24 9075 478 4159 9075 478 4159
13 Washer DIN125-A5.3 --- 9291 021 0120
14 Short circuit wire 4128 440 1105 4128 440 1101 1)
15 Carburetor housing 4128 120 0100 4128 120 0101 1)
All other parts as before
Modification to be introduced from serial number 1 57 798 575
Remarks
1) Previous version of part remains available as spare for older machines and other models
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Technical Information 05.2003 Page 5
2. Gearhead (FS 350, FS 450)
New gearheads will be installed in the above- The new gearheads will be installed on the
mentioned models to further improve durability. production line from the following serial numbers:
FS 350: from serial number 1 57 408 431
FS 450: from serial number 1 57 337 493
The most important modifications are:
1
. Extended neck (1) with radiused transition – for
improved clamping of drive tube
. Precision axial location of the drive pinion with a
set screw (2) – it is no longer necessary to use
shims to compensate for tolerances
. Shape of housing (3) optimized and
strengthened at output end – for greater
durability
2 The diameter of the bolt pattern for the guard ring
mounting screws has been increased from 43 mm to
3 3 46 mm. The new matching guard rings have been
256TI007 KN
allocated new part numbers.
Parts availability
New gearhead 4128 640 0101 The replacement housing 4128 641 0350 for
1 Extended neck with radius previous versions of the gearhead has been
2 Set screw updated in accordance with this latest modification
3 Strengthened housing and will be supplied with the new guard rings to
ensure interchangeability.
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)m~ge 6 Technical Information 05.2003
Service notes
The set screw that locates the drive pinion is coated In the case of repairs on previous gearheads, use
with threadlocking adhesive (micro-encapsulated). pinion set 4128 640 7301 instead of 4128 640 7300.
In the case of repairs, use a new set screw or install
the existing one with threadlocking adhesive
(LOCTITE 243).
Summary
Item Part Name Previous New Remarks
Gearhead; 4128 640 0125 4128 640 0101 1)
including items 1 to 21:
1 Gear housing; 4128 641 0350 4128 641 0351 2)
including items 8 and 12:
2 Deep groove ball bearing 6001 9503 003 0210 9503 003 0210
3 Deep groove ball bearing 6001-Z 9503 003 5180 9503 003 5180
4 Circlip 28x1.2 9456 621 3100 --- 2)
5 Circlip 12x1 9455 621 1130 9455 621 1130
Set of pinions; including items 6 and 7: 4128 640 7301 4128 640 7302 2)3)
6 Drive pinion -*-
fo -*- 4)
7 Drive shaft -*- -*- 4)
8 Set screw M6 --- 0000 953 1001 3)
9 Deep groove ball bearing 6000 9503 003 0100 9503 003 0100
10 Deep groove ball bearing 6202-2RS 9503 003 7450 9503 003 7450
11 Guard ring (for mowing) 4128 717 2701 4128 717 2704 2)
12 Spline socket screw IS-M5x10 (3 x) 9022 399 0950 9022 399 0950
13 Thrust plate; including item 14: 4128 710 3800 4128 710 3800
14 Guard washer Ø 60 mm 4116 717 2800 4116 717 2800
15 Guard washer 4119 717 2800 4119 717 2800
16 Thrust washer 4128 713 1600 4128 713 1600
17 Screw plug 4119 713 6500 4119 713 6500
18 Collar nut M12x1.5, l/h thread 4119 642 7600 4119 642 7600
19 Spline socket screw IS-D6x28 (2 x) 9075 478 4712 9075 478 4712
20 Washer DIN125-A6.4 (2 x) 9291 021 0140 9291 021 0140
21 Guard ring (for sawing) 4128 717 2706 4128 717 2707 2)
Modification to be introduced: see description
Remarks
1) Previous version of part will be supplied only as long as existing stocks last
2) Previous version of part remains available as spare for older gearheads
3) see service note
4) Part is not available as a separate item
3. Drive Tube (FS 350)
Models FS 350 from serial number 1 57 234 145
will be equipped with new strengthened drive tubes
to further improve durability and standardize parts
with those of models FS 450. Drive shaft
4134 711 3200 remains unchanged.
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Technical Information 05.2003 Page 7
Summary
Item Part Name Previous New Remarks
1 Drive tube, Ø 28 mm USA; 4134 710 7106 4134 710 7109 1)
including items 2 to 4:
2 Flexible liner 4134 711 7302 4128 711 7300 2)
3 Plug 4134 711 2100 4128 711 2100 2)
4 Warning pictogram FS USA 0000 967 3684 0000 967 3684
Modification to be introduced from serial number 1 57 234 145
Remarks
1) Previous version of part is no longer available from factory
2) Previous version of part remains available as spare for older drive tubes
4. Rewind Starter, Fan Housing, Pawl
Shroud (FS 450) The new pawl 0000 195 7200 is equipped with a
Modification of these assemblies brings the model metal guide pin for the spring clip and replaces the
into line with the latest developments. The changes existing pawl 4116 195 7200.
include the rewind spring, the ElastoStart starter
rope, the pawl and the fan housing. In addition,
Starter rope
The existing ElastoStart 0000 190 3400 (with
new round nameplates have been introduced
800 mm (31.5 in) starter rope) will be replaced by
which are attached to the fan housing rather than
the version 0000 190 3405 (with 850 mm (33.5 in)
the shroud.
starter rope).
1
250TI033 KN
256TI012 KN
1 2
Rewind spring
Fan housing, shroud, nameplates
The existing rewind spring 4134 190 0600 (1) will be
There are two mounting bosses (arrows) in the new
replaced by rewind spring 4134 190 0601 (2) with a fan housing 4128 080 1801 for the new rewind
housing. The new spring housing is mounted in the spring housing. A screw (1) with an annular groove
fan housing with two P3x6 screws. in its head is fitted in the starter post. The spring clip
engages in the annular groove of this replaceable
screw.
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)m~ge 8 Technical Information 05.2003
The spring housing mounting screws in the fan
1 housing must be tightened down to a torque of
0.7 Nm (6 in lbs).
When tensioning the new rewind spring make sure
that the remaining reserve pull on the rope rotor is
1.5 revolutions.
The new starter rope (850 mm long(33.5 in)) must
not be installed in the previous version of the rewind
2 starter because the rewind spring will otherwise be
256TI013 KN
permanently damaged.
Left: Existing shroud 2
Right: New shroud
The existing nameplates (1) on the shroud will be
discontinued and replaced by the new round
nameplates (STIHL logo and model designation) on
the fan housing. Only the STIHL name (2) will be
printed on the modified shroud.
Service notes
256TI015 KN
1 Nameplate 4128 967 1508 (1) is included with the
new shrouds so that they can be used for all models
256TI014 KN
available worldwide. This new nameplate consists
2
of a backing sheet with self-adhesive labels for all
models. If the new shroud is used for an older
As the previous and new versions of the fan housing
model, the appropriate nameplate is simply
and rewind spring cannot be installed together, use
detached from the backing sheet and stuck to the
the new fan housing with rewind starter
new shroud in the area shown (2).
4128 080 2101 as a replacement for older
machines. The fan housing can then be fitted with
the neutral round STIHL nameplate (1) or the round
nameplate with model designation (2).
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Technical Information 05.2003 Page 9
17
7
12, 13
2
16
4
256TI019 KN
11 3 5
Summary
Item Part Name Previous New Remarks
1 Fan housing with rewind starter; 4128 080 2100 4128 080 2101 1)
including items 2 to 11:
2 Fan housing 4128 080 1800 4128 080 1801 1)
3 Screw with grooved head --- 4223 084 5600
4 Rewind spring 4134 190 0600 4134 190 0601 2)
5 Pawl 4116 195 7200 0000 195 7200 2)
6 ElastoStart; including item 8: 0000 190 3400 --- 2)
7 ElastoStart; including item 9: --- 0000 190 3405
8 Starter rope, Ø 3x800 mm (31.5 in) 0000 195 8200 --- 2)
9 Starter rope, Ø 3x850 mm (33.5 in) --- 0000 195 8203
10 Self-tapping screw 3.5x6.5 (1 x) 9099 021 2330 --- 2)
11 Screw P3x6 (2 x) --- 9104 003 0410
12 Nameplate, STIHL --- 0000 967 1500
13 Nameplate, FS 450 4128 967 1502 4128 967 1506 2)
14 Nameplate, FS 450 K 4128 967 1503 --- 2)
15 Shroud, USA, CDN 4128 084 0901 --- 1)
16 Shroud, USA, CDN; including item 17 --- 4128 080 1651
17 Nameplate --- 4128 967 1508
Modification to be introduced: in progress
Remarks
1) Previous version of part will be supplied by factory only as long as existing stocks last
2) Previous version of part remains available for older machines and other models
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)m~ge 10 Technical Information 05.2003
5. Clutch (FS 350, FS 450)
Service note
The washers 0000 958 1000 must not be installed
in the previous version of the clutch. The carriers
and shoes of the previous and new clutches must
not be combined.
256TI017 KN
The previous clutch 4128 160 2000 was modified
for quieter operation. The new version
4128 160 2001 has 16x10x0.5 washers (arrows) at
the two bearing points between the carrier and the
clutch shoes.
Summary fo
Item Part Name Previous New Remarks
1 Clutch; including: 4128 160 2000 4128 160 2001 1)
2 Washer 16x10x0.5 (2 x) --- 0000 958 1000
All other parts as before
Modification to be introduced: in progress
Remarks
1) Previous version of part is no longer available from factory
Last Technical Information on models FS 350: 42.2002
FS 450: 56.2000
© ANDREAS STIHL AG & Co. KG, 2003 Technical Documentation
D1/MTK-sc 7815
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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.