Stiga 75 YEARS LIMITED EDITION [61/192] Safety
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Stiga 75 YEARS LIMITED EDITION [61/192] Safety

Stiga 75 YEARS LIMITED EDITION [61/192] Safety
61
ENGLISH
EN
6.13 SPARK PLUG
The spark plug(s) must be replaced after 200 hours
of operation.
Before disconnecting the spark plug, clean around
its mounting.
Spark plug
: Champion RC12YC or equivalent.
Electrode distance
: 0.75 mm.
6.14 ENGINE’S COOLING AIR IN-
TAKE (7:U)
The engine is air-cooled. A blocked cooling sys-
tem can damage the engine. Clean the engine’s
cooling air intake every 50 operating hours. A
more thorough clean of the cooling system is car-
ried out at each basic service.
6.15 FUSE
In the event of electrical faults, check/replace the
fuse, 20 A. See fig. 20.
If the fault persists, contact an authorised work-
shop for repair.
6.16CUTTING DECK
6.16.1Safety
To reduce the risk of accidental injury in the event
of a collision and to protect important parts in the
cutting deck, a force limiter is integrated as fol-
lows.
• Shear bolts between blades and blade bar.
• Torque limiting between gear wheels and blade
shaft.
• Possibility of positive drive belt slipping on the
plastic gear wheels.
6.16.2Dismantling
It is easier to carry out certain maintenance work if
the cutting deck is removed from the machine. Re-
move the cutting deck as follows:
1. Set the maximum cutting height.
2. Pull out the belt idler (21:H) and push the belt
(21:J) down by the side of the belt idler to re-
lease the belt tension.
3. Force the belt off the machine’s pulley.
4. Raise the deck and unhook the lift cable’s
spring (22:K).
5. Remove the locking screws (23:L) from both
sides.
6. Unhook the deck from the front axles and move
the deck forward. See fig. 24.
6.16.3Assembly
Install the cutting deck as follows:
1. Hook the deck over the front axles.
See fig. 24.
2. Install the locking screws (23:L) on both sides.
3. Set the maximum cutting height.
4. Raise the deck and hook on the lift cable (22:K).
5. Install the belt (21:J) onto the pulley.
6. Pull out the belt idler (21:H) and place it on the
outside of the belt so that the belt tensions.
6.16.4Replacing blades
Wear protective gloves when changing
blade(s) to avoid cutting yourself.
Check that the blades are always sharp. This pro-
duces the best cutting results. The blades should be
replaced once a year.
Always check the blade(s) after a collision. If the
blade system has been damaged, defective parts
should be replaced.
Always use genuine spare parts. Non-
genuine spare parts can entail a risk of
injury, even if they fit the machine.
The blades are replaceable. When replacing, both
blades on the same blade bar must be replaced to
avoid imbalance.
Attention!
Note the following when reassembling:
• The blades and blade bar must be installed as in
fig 25.
• The blades can be turned 1/3 of a turn in their
mountings. Select positions so that the blades
are offset 90° from each other. See “6.16.5” be-
low.
Tightening torque:
Screws (25:P) - 45 Nm
Shear bolts (25:Q) - 9.8 Nm
In the event of a collision, the shear bolts (18:Q)
can break and the blades bend back. If this has hap-
pened, install genuine shear bolts and tighten as
above.
6.16.5Synchronising, blades
The deck has synchronised blades.
If one of the blades has struck a solid object (e.g. a
stone), the synchronisation may be altered. This
entails a risk of the blades colliding with each oth-
er.
Correctly synchronised blades must be offset 90°
from each other. See fig. 26.
Always check synchronisation after a collision.
If the blades are not synchronised, one or more of
the following faults may have occurred in the cut-
ting deck:
• The positive drive belt has slipped on the gear
wheels.

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