Stiga MP 84/98 Workshop Manual page 22

WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
Important informations
Characteristics of the original blades
The original blades have design, material and
processing characteristics optimised for use on
the equipment for which they were designed; these
characteristics are not present in so­called "com­
patible" spare parts.
Here are the reasons why it is important to choose
an original blade, useful when making such deci­
sions.
a) No breakage of the blade
ends. Using steel balls, the manu­
facturer simulates what can hap­
pen when mowing over any foreign
bodies on the lawn. This can ruin the blade edge,
but no component can come loose, fall off or be
hurled away.
b) No breakage of the blades.
The impact test is the most severe
durability test that any lawnmower
can be subjected to. An iron tube is
placed exactly inside the blades when the mower
is running. The blade may deform but it will never,
under any circumstances, fall off or break. This test
verifies that blades and other components meet the
high safety requirements.
c) Excellent cutting result. The
blades and blade ends supplied
by the authorised dealer are opti­
mised for the application for which
they are intended. In short, this means that the
blades are suitable for the shape of the casing and
to the number of revolutions to provide the best
possible cutting result.
TROUBLESHOOTING AND REMEDIES
Problem
Slack belt
The blades do not
engage or do not Incorrect adjustment of the
stop promptly within 5 engagement spring
seconds when they are
Electromagnetic engagement
disengaged
problems
Cutting deck not parallel to the
ground
Uneven mowing
Blades cutting badly
Misaligned blades
Loose joint bolts and screws
Abnormal noise or vibra-
Pulleys or guide pulleys are
tions
worn and do not rotate correctly
Problem
Excessive clearance on
Worn pinion and crown teeth
the steering wheel
The machine does not
maintain a straight line
Incorrect tie-rod adjustment
when the steering wheel
is straight
CHAPTER
3.2
3. Cutting deck
Probable cause
Adjust the engagement
Adjust the engagement
Check and/or replace
Check the tyre pressures
Align the cutting deck with the ground
Check their condition and that they are
well sharpened
Check the blade shafts and flanges
Check and adjust
Check and/or replace
4. Steering
Probable cause
Adjust and/or replace
Adjust
REVISION FROM ... PAGE
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Solution
[4.1]
[4.1]
[7.5]
[6.1]
[4.5]
[4.9]
[4.8]
[5.7]
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Solution
[4.6]
[6.3]
[4.7]