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Technical Information · issue 55 of 2001

New cutting tools for STIHL brushcutters: STIHL Au

IssueTI 55/2001

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TI 55/2001 page 1
Technical Information

                                                                                                         55.2001
New accessory for STIHL trimmers

Contents
1. STIHL AutoCut® C 5-2 mowing head
   1.1 Mounting the mowing head

   1.2 Adjusting the nylon line

   1.3 Refilling the mowing head
   1.4 Spare parts

1.    STIHL AutoCut® C 5-2 mowing head                           The new STIHL AutoCut® C 5-2 comprises the

                                                                 following individual parts:

                                                                     fo 1

                                                                        2
                                                                        3

                                                                        4
                                                   681TI016 BL

                                                                                                                      681TI030 BL

The STIHL AutoCut® C 5-2 mowing head can be
                                                                 1   Cap
refilled from the outside. In other words, the nylon
                                                                 2   Spring

line can now be replaced without dismantling the
                                                                 3   Spool (with nylon line)
mowing head. A "quiet mowing line" with 0.080“
                                                                 4   Spool housing
diameter (green) is used to reduce the level of noise

created by the line.                                             The spool housing is not available as a separate
The STIHL AutoCut® C 5-2 can be used on trimmer                  item. The nylon line is available in bulk quantities as
models FS 45, 46 and FSE 60.                                     a special accessory, see "Spare parts".

Instructions for assembling and refilling the mowing
head are contained in the User Manuals for the
machines and are also supplied with the mowing
head.

TI_55_2001_03_01_01.fm                                                                               englisch / english
)m~ge 2                                                                                     Technical Information 55.2001

1.1     Mounting the mowing head
.     Switch off the trimmer and lay it down with the
      mowing head facing upwards
.     Remove the mowing head if already fitted                                 8

                                                                               5
                                                                               7
                                                                               1

                                                                                                              6
                                  681TI017 BL

                                                                                                                            681TI019 BL
.     Remove thrust plate – if fitted
                                                                       .   Turn the spool (5) clockwise until the
.     Mount the new AutoCut® C 5-2 mowing head                                 fo
                                                                           two arrows (6) are aligned; hold the spool in this
The mowing head is pre-assembled and filled with                           position
nylon line on delivery.                                                If the spring (7) has escaped:
                                                                       .   Insert the spring vertically in the spool (5)


          3
                                                                                8

          2
          4

                                                         681TI018 BL

.     Slide the head (1) with fitted spool onto the
                                                                                                                            681TI020 BL

      shaft (2), fitting the hexagonal recess (3) over
      the hexagon shoulder(4)

                                                                       .   Place the cap (8) in the spool and press it down
                                                                           as far as possible, turning it clockwise at the
                                                                           same time and tighten down by hand
                                                                       The mowing head is now ready for use.

                                                                                                        TI_55_2001_03_01_01.fm

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TI 55/2001 page 2
Technical Information 55.2001                                                                                        Page 3

1.2     Adjusting the nylon line                                       1.3.1 Removing scraps of nylon line
The STIHL AutoCut® C 5-2 is a semi-automatic                           The supply of nylon line in the mowing head is used
mowing head; the length of nylon line is adjusted                      up completely in normal operation.
during operation:                                                      Since scraps of nylon line can impair correct
                                                                       operation of the mowing head, they must be
                                                                       removed before the mowing head is refilled with
                                                                       fresh nylon line.


                                                       681TI021 BL
             1

                                                                                                                          681TI022 BL
.     Open the throttle fully
.     Hold the rotating mowing head horizontal above
      the ground – tap it on the ground – about 1 1/4"
      (3 cm) fresh line is advanced – line limiter (1) on
                                                                       .
                                                                           Switch off the machine (switch off the ignition)
      deflector (2) trims surplus line to the correct                  .   Lay the trimmer down with the mowing head
      length – avoid tapping head more than once!                          pointing upwards
The line feed only operates if both lines still have a

minimum length of 2.5 cm / 1". If the line is too short
it will not feed out of the head.


1.3     Refilling the mowing head
The mowing head must be examined for signs of
wear before refilling with fresh nylon line.



                                                                                                                          681TI023 BL
                                                         681TI036 KN

                                                                       .   Hold the mowing head and turn the cap (1)
The complete mowing head must be replaced if the                           counterclockwise until it can be removed
signs of major wear illustrated above are seen.
                                                                       .   Pull the spool (2) out of the head (3) and remove
                                                                           any scraps of nylon line; clean the spool if
                                                                           necessary

TI_55_2001_03_01_01.fm
)m~ge 4                                                                                  Technical Information 55.2001

                                                                  Important: STIHL recommends that the "quiet
                                                                  mowing line" with 0.080“ diameter (green) – see
                                                                  "Spare parts" – be used on machines with an electric
                                                                  motor (FSE 60).
                                                                  The "quiet line" also reduces the noise emitted by
                                                                  machines with an internal combustion engine
                                                                  (FS 45, FS 46).

      4                                                           .   Cut a 13 foot length of nylon line from the reel

      2                                                           .   Cut this length of nylon line into two halves
                                                                      (A, B) measuring 6 feet 6 inches each

      3
                                                                  1.3.3 Spooling the nylon line


                                                   681TI024 BL


.   Insert the empty, clean spool (2) in the head (3)                  4
.   If the spring (4) has escaped: insert the spring
    vertically in the spool (2)
                                                                       A
.   Secure the mowing head on the output shaft;
    see "Mounting the mowing head"

                                                                                4
1.3.2 Cutting nylon line to the required length
                                                                                    3

                                                                                                                        681TI026 BL


                                                                  .   Turn the spool (1) until the two arrows (2) are

                       2 mm                                           lined up
                      (0.08")
                                                                  .   Slide the nylon lines A and B with straight ends

                                  4m                                  through the holes (3) in the head (4) at the points
                                (13 ft)                               marked "Schnur/Line 1" and "Schnur/Line 2"
                          B


                          2m
                                                    681TI037 BL

                         (6 ft 6 in)

                                                                                                  TI_55_2001_03_01_01.fm

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TI 55/2001 page 3
Technical Information 55.2001                                                      Page 5

                                                  B
                          A

                                                      681TI027 BL

.   Slide both nylon lines (A and B) into the spool
    as far as possible (approx. 2 inches)

                                                       681TI028 BL

.   Hold the upper part of the mowing head and turn

    the spool counterclockwise until ...

         10 cm                     10 cm
          (4")                      (4")
                                                      681TI029 BL

.   ... the shortest piece of line protrudes approx. 4“
    from the mowing head
.   If necessary, shorten the longer piece of line to
    approx. 4“
The mowing head is now full.

TI_55_2001_03_01_01.fm
)m~ge 6                                                                             Technical Information 55.2001

1.4    Spare parts

       7                                   1


                                            2,3


                                            6
                                                     681TI038 KN

Item       Part name                                                    Part No.                      Remarks
           Mowing Head STIHL C 5-2;                                     4006 710 2106
           comprising Items 1, 2 and 4 to 6

 1         Spool housing                                                -*-                           1)
 2         Spool with nylon line                                        -*-                           1)
           containing Item 3 and 4 with nylon line

 3         Spool w/o line                                               4006 713 3000
 4         Nylon line 0.080“ dia. x 6’ 6“ (2x)                          -*-                           2)

           Nylon line 0.080“ dia. x 50 ft                               0000 930 2588                 3)
           Nylon line 0.080“ dia. x 1/2 lb                              0000 930 2580                 3)
           Nylon line 0.080“ dia. x 1 lb                                0000 930 2264                 3)

           Nylon line 0.080“ dia. x 5 lb                                0000 930 2264                 3)
 5         Compression spring                                           0000 997 2000

 6         Cap                                                          4006 710 4001
 7         Warning pictogram                                            0000 967 3706

Remarks
1) Part not supplied separately
2) Line must be cut to length from the bulk reel of nylon line, see part with remark 3)

3) Spare nylon line

Last Technical Information on STIHL Trimmer Accessoires:07.1999
                                                       34.1999

© 2001 Andreas Stihl AG & Co.                                      Technical Documentation
  Waiblingen                                                       1/MTK-na                                  7425

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