Technical Information · issue 12 of 2008
STIHL MM 55 C MultiEngine
IssueTI 12/2008
Full text
Page 1 of 5
STIH)
Technical Information 12.2008
STIHL MM 55 C MultiEngine – Series 4601
Contents
1. Technical Description
2. Specifications
3. Spare Parts
4. Repairs
5. Summary
The new MM 55 C with Easy2StartTM greatly 1. Technical Description
reduces cranking effort for smoother starts.
When the starter rope is pulled a spring stores the 1.1 Nameplate
energy and transfers it to the engine via a carrier in
the starter assembly.
User benefits:
. Effort required to start the engine is greatly
reduced
. Required cranking speed is considerably
reduced
469TI038 KN
The additional components of the Easy2StartTM will
have an added weight of only 0.4 lbs (200 g).
The new version with Easy2StartTM is identified by
the nameplate.
TI_12_2008_30_01_01.fm englisch / English USA
)m~ge 2 Technical Information 12.2008
1.2 Rewind Starter with Easy2StartTM
4
8 10
11
1 5
6 7 13
9
15
12 16
469TI053 KN
14
Item Part Name New parts Common parts Easy2StartTM
Easy2StartTM version and standard version
1 Rewind starter 4601 190 4001
2 Starter grip 4140 195 3400
3 Starter rope 4137 195 8200
4 MM 55 C nameplate 4601 967 1501
5 Rewind spring 4140 190 0601
6 Rope rotor 4140 195 0410
7 Pawl 4116 195 7200
8 Washer 0000 958 0923
9 Spring 1118 195 3500
10 Spring housing with spring 4140 190 0710
11 Carrier 4140 195 2010
12 Washer 9307 021 0120
13 Screw 9022 399 0950
14 Pawl 4133 195 7201
15 Torsion spring 0000 998 0612
16 Clutch carrier; 4140 190 2010
including items 14 and 15
TI_12_2008_30_01_01.fm Page 2 of 5
Technical Information 12.2008 Page 3
1.3 Connecting Tube 2. Specifications
Weight, dimensions of the starter rope and the
overall length of the unit have changed.
2.1 Weight
The MultiEngine with Easy2StartTM is about 0.4 lbs
(200 g) heavier than the previous version.
Weight of MultiSystem with pick tine cultivator:
0.98 in
(25 mm) MM 55: 21.2 lbs (9.6 kg)
1.06 in MM 55 C: 21.6 lbs (9.8 kg)
(27 mm)
2.2 Starter rope
Starter rope 4137 195 8200 (0.105 in x 35.8 in /
2.7 mm x 910 mm) is used in machines with
Easy2StartTM.
469TI054 KN
2.3 Dimensions
The introduction of the new connecting tube
Top: Previous connecting tube, increases the overall length of all versions by 1.06 in
version without Easy2StartTM (27 mm).
Bottom: New connecting tube,
version with Easy2StartTM
3. Spare Parts
A new connecting tube with a total length of 25.8 in
(657 mm) has been introduced for all versions (with The illustrated parts list for the MM 55 C is on the
STIHL Service Communication Systems
and without Easy2StartTM). The new tube is 1.06 in
(27 mm) longer than the previous tube. (mediaCAT® DVD) from issue 01/2008.
The handle can only be completely folded on
updated Easy2StartTM versions if the longer
connecting tube is used. The previous connecting
tube can only be used in combination with
MultiEngines without Easy2StartTM.
If the standard version is updated with the
Easy2StartTM, the pawls and carrier on the
crankshaft must be replaced in addition to the
rewind starter. The new, longer connecting tube
must also be installed.
The new connecting tube is available as a
replacement part and can be used for all versions.
The previous connecting tube is no longer available
as a replacement part.
TI_12_2008_30_01_01.fm
)m~ge 4 Technical Information 12.2008
4. Repairs
If the machine is started in the course of repairs, it is essential to observe all safety regulations and the safety
precautions in the instruction manual.
4
8 10
11
1 5
6 7 13
9
15
12 16
469TI053 KN
14
4.1 Tensioning the rewind spring 4.4 IS-M5x10-10.9 screw
Tension the rewind spring as described in the The IS-M5x10-10.9 screw (13) which secures the
service manual for Series 4140 components. carrier to the spring housing is micro-encapsulated.
When assembling, use either a new screw or secure
When the starter rope is fully extended the rotor
the existing screw with Loctite 242 (medium
must be able to rotate at least another two full turns.
strength), Part No. 0786 110 0116.
If this is not the case, the spring is over tensioned
and may become damaged. To release tension,
4.5 Tightening torques
remove one coil of rope from the rotor and re-check.
Screw (13), 2.95 lbs.ft Carrier to spring
4.2 Spring housing with spring IS-M5x10-10.9 (4 Nm) housing
When needed, lubricate the spring housing with Carrier (16) 12.5 lbs.ft Carrier to crankshaft
spring (10) 4140 190 0710 with STIHL gear (17 Nm)
lubricant 0781 120 1117 or 0781 120 1118.
Loosen the IS-M5x10-10.9 screw (13) and remove
the carrier (11). Do not remove the preloaded spring
from the spring housing (10) since it may pop out of
position and uncoil.
4.3 Spring
When needed, lubricate the spring (9)
1118 195 3500 with STIHL gear lubricant
0781 120 1117 or 0781 120 1118.
Remove the IS-M5x10-10.9 screw (13).
TI_12_2008_30_01_01.fm Page 3 of 5
Technical Information 12.2008 Page 5
4.6 Position of throttle cable 4.7 Throttle cable retainer
5 4
a
7
8 9
3 2 1 9
469TI056 KN
469TI055 KN
7 6 2
The throttle cable (2) runs from the engine (1) to the Mount the retainer (9) for the throttle cable (2) on
control handle (8). It passes through the loop the handlebar (7) at an angle of 90° (a).
handle (3) and over the top of the connecting
tube (4). The throttle cable (2) is secured to the
connecting tube (4) with cable clip (5)
4119 719 9400. At the end of the connecting
tube (4) the throttle cable (2) runs along the inside of
the handlebar (7) and under the brace (6). The
retainer (9) holds the throttle cable (2) in position
below the control handle (8).
5. Summary
Item Part Name Previous New Bem.
1 Connecting tube 4601 760 8601 4601 760 8603 1)
Modification to be introduced: in progress
Remarks
1) Only new version of part is available from factory
© ANDREAS STIHL AG & Co. KG, 2008 Technical Documentation
D1/MTK-ke
TI_12_2008_30_01_01.fm Page 4 of 5
Page 5 of 5
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.