ST. SpA NJ 92 Série Manuel D'utilisation page 83

PROBLEM
9. U neven mowing and poor grass
collection
10. U nusual vibrations while
working
11. U ncertain or ineffective braking
12. E rratic forward movement,
poor drive when going uphill or
if the machine has a tendency
to rear up
13. With the engine running, the
machine does not move when
the drive pedal is pressed
(hydrostatic transmission
models)
14. T he machine starts to vibrate
abnormally
If problems persist after having performed the above operations, contact your dealer.
WARNING! Do not take on complicated repair work without the necessary equipment and
technical knowledge. The guarantee is automatically revoked and the manufacturer declines
all responsibility for any poorly effected repairs.
LIKELY CAUSE
– c utting-means assembly is not
parallel to the ground
– inefficient cutting means;
– f orward speed too high
compared to the height of grass
being cut
– c ollector channel is blocked
– c utting-means assembly is full
of grass
– t he cutting means are
unbalanced or loose
– l oose bolts and screws
– t he brake is not adjusted
correctly
– p roblems with the belt or the
engagement device
– release lever in position «B»
– d amaged or loose parts
18
SOLUTION
– c heck the tyre pressure
(see 5.3.2)
– r einstate the alignment of the
cutting-means assembly in
relation to the ground (see 6.3.1)
– c ontact your Dealer
– r educe the forward speed and/
or raise the cutting-means
assembly (see 5.4.5)
– w ait for the grass to dry
– r emove the grass catcher and
empty the collector channel
(see 5.4.7)
– c lean the cutting-means
assembly (see 5.4.10)
– c ontact your Dealer
– c heck and tighten all the engine
and frame bolts
– c ontact your Dealer
– c ontact your Dealer
– m ove to pos. «A» (see 4.33)
– s top the machine and disconnect
the spark plug cable
– i nspect for damage
– c heck for and tighten any loose
parts.
– H ave all checks, repair work and
replacements carried out by a
specialized Centre only.