Possible Cause - Stihl RT 4082 Gebrauchsanleitung

Fault:
Excessive vibration during operation.

Possible cause:

– Mowing blade imbalance due to
incorrect sharpening or damage.
– Blade fastening screw not fastened
tightly.
– Engine mounting not securely
tightened.
– V-belt damaged.
– Discharge chute blocked.
Remedy:
– Re-sharpen mowing blade and balance
or replace mowing blade. (
– Tighten blade fastening screw to the
specified torque. ( 14.7)
– Tighten engine mounting. ( )
– Replace V-belt. ( )
– Clean discharge chute. ( )
Fault:
Poor cut, lawn turns yellow after mowing.
Possible cause:
– Mowing blade blunt or worn.
– Driving speed too fast in relation to
mowing conditions (cutting height, lawn
condition).
– Maximum engine speed not set (throttle
lever not in MAX position).
– Mowing deck adjustment not OK.
– Discharge chute blocked.
– Mowing deck soiled with grass residues
(deposits on inside of mowing deck
housing).
Remedy:
– Sharpen or replace mowing blade
(observe wear limits). (
– Reduce driving speed and select a
higher cutting height.
– Set throttle lever to the MAX position.
( 8.2)
112
– Check mowing deck adjustment and re-
adjust mowing deck if necessary.
( 14.8)
– Remove grass catcher box and free
discharge chute from grass residues.
– Clean inside of mowing deck.
Fault:
Discharge chute blocked.
Possible cause:
– Mowing blade wing worn or damaged.
– Mowing grass which is too long or too
wet.
– Driving speed too high in relation to set
14.7) cutting height.
– Maximum engine speed not set (throttle
lever not in MAX position).
– Level sensor adjusted incorrectly.
Remedy:
– Replace mowing blade. (
– Mow lawn in two stages: 1. Mowing at
highest cutting level.
2. Mowing at desired cutting height.
– Reduce driving speed and select a
higher cutting height.
– Set throttle lever to the MAX position.
( 8.2)
– Adjust level sensor (pull slide out fully).
( 8.15)
Fault:
Grass catcher box not being completely
filled.
Possible cause:
– Level sensor incorrectly adjusted.
– Cutting height set too low.
– Grass is excessively damp and
14.7) consequently too heavy to be
transported through the discharge
chute in the grass catcher box.
– Mowing blade is blunt or worn.
– Grass is too high.
– Air holes in the grass catcher box
blocked (no air flow in grass catcher
box).
– Discharge chute or mowing deck
(inside) soiled through deposited grass
residues (residue from last mowing
operation).
Remedy:
– Adjust level sensor. (
– Set a higher cutting height.
– Wait until the lawn is dry.
– Sharpen or replace the mowing blade.
( 14.7)
– Mow the lawn in two stages:
1. Mowing at the highest cutting level,
2. Mowing at the desired cutting height.
– Clean the grass catcher box (clean air
holes).
– Clean discharge chute or inside of
mowing deck.
14.7)
Fault:
Level sensor (grass catcher box) does not
respond properly.
Possible cause:
– Level sensor (grass catcher box) soiled
through grass residues.
– Level sensor (grass catcher box)
incorrectly adjusted.
– Driving speed too high.
Remedy:
– Clean the level sensor and check for
ease of movement.
– Adjust level sensor (grass catcher box).
( 8.15)
– Adapt driving speed to the mowing
conditions (reduce driving speed).
8.15)
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