Stihl RT 4082 Instruction Manual page 118

– 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.
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).
116
Fault:
Mowing blade does not switch on/does not
turn.
Possible cause:
– The safety devices are preventing
activation of the mowing blade.
– V-belt (mowing deck) worn, detached or
8.15)
defective.
Remedy:
– Check whether all the safety
requirements for activation of the
mowing blade are met. (
– Check V-belt (mowing deck) and
replace if necessary. ( )
Fault:
Engine cuts out when mowing deck
activated.
Possible cause:
– User not sitting or not properly
positioned on driver's seat.
– Seat switch or wiring defective.
– Grass catcher box switch not actuated
or defective.
Remedy:
– Sit on driver's seat or change seat
position.
– Repair/replace seat switch or wiring.
( )
– Install grass catcher box or deflector
(not included in standard equipment), or
repair/replace grass catcher box switch.
( )
Fault:
Mowing deck disengaged when mowing in
reverse driving direction.
Possible cause:
– Reverse mowing safety switch not
pressed.
Remedy:
– Release the mowing blades within the
time window (5 seconds before to
1 second after engaging the mowing
deck or changing the driving direction).
11.) ( 8.4)
Fault:
Engine cuts out when user leaves driver's
seat.
Possible cause:
– Parking brake not engaged.
– Mowing deck engaged (safety device).
Remedy:
– Engage the parking brake before
leaving the driver's seat. (
– Disengage the mowing deck before
leaving the driver's seat. (
Fault:
Three acoustic signals sound in quick
succession.
Possible cause:
– Fault in seat switch or electrics (short
circuit).
Remedy:
– Turn ignition key to "engine off"
position, carry out self-diagnosis.
( 9.1)
8.10)
8.3)
0478 193 9905 C - EN