Tensioning The Return Spring; Replacing The Return Spring - GEISMAR STUMEC MTZ 350S Manual

Lightweight rail cutting machine
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➏ Force the end of the cord out of the hole in the
starter handle Ref.⑧ using a screwdriver.
➐ Remove the rest of the cable from the pulley
and the starter handle.
➑ Insert the new starter cord from the top
through the starter handle and the cord
guiding sleeve Ref.⑨.
8
9
➒ Push the cord through the pulley and hold it in
position with a simple knot.
➓ Slide the pulley onto the shaft. Move it back
and forth until the return spring eyelet clicks
into position.
Put the pawls back in place on the pulley.
11
Slide the washer on the shaft.
12
Push the snap-ring back in position on the
13
shaft over the pins on the pawls. The ring
must be fitted so that it is facing anti-
clockwise.
5.1

5.1.9 Tensioning the return spring

➊ Form a loop with the unwound part of the
starter cord and using the loop rotate the
pulley by six turns in the direction shown by
the arrow.
➋ Holding the pulley in position, pull the twisted
cord outside the housing and let it untwist.
➌ Release the pulley and gently let go of the
cord so that it can wind itself round the pulley.
➍ Checking cord tension:
- If the starter unit handle drops to the side
once it has been released, this means that
there is not enough tension on the cord.
Tension the spring by putting an extra
turn on the pulley.
- If another half-turn cannot be made on the
pulley after the cord has been pulled right
out, this means that there is too much
tension on the cord.
Remove one turn of cord on the pulley.
➎ Put the cover back in place on the starter unit.
MTZ_Gb_00307_070525.doc

5.1.10 Replacing the return spring

➊ Dismantle the starter cord pulley by following
instructions n°1 to n°5 described in §5.1.8
"Replacing the starter cord".
➋ Remove the 2 screws Ref.① (multi-purpose
spanner).
➌ Remove the spring box Ref.② and any broken
pieces of spring.
➍ Put the new spring box in position bottom
upwards.
➎ Re-tighten the two screws Ref.①.
➏ Refit the cable pulley, carrying out operations
10 to 13 described in §5.1.8 "Replacing the
starter cord".
➐ Re-tension the return spring (See §5.1.9).
NB : if the spring has escaped from its box, put it
back in place by coiling it anti-clockwise from
the outside to the inside.
1
2
1
5.1

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