Troubleshooting
-78-
9
Area Malfunction Possible cause Corrective action
Lighting
system
Head lamp failure * Improper wiring → Connect properly.
* Bulb is disconnected. → Replace.
* Blown fuse → Replace.
Grass cutter
devices
Mown grass not discharged
well
* Wet grass → Perform the operation after
grass becomes dry.
* Grass too long →
Mow twice with a higher mowing
height
* Mowing height too low → Set the mower to a higher
mowing height.
* Low engine speed → Set the mower to the
maximum motor speed.
* High work speed → Work more slowly.
Some grass is left unmown. * High work speed → Work more slowly.
* Low engine speed →
Set the mower to the maximum
motor speed. (Check engine
speed.)
* Grass too long → Mow twice.
* Wear and breakage of cutter → Replace the blade with a new
one. (See page 69)
* Accumulation of grass on the
internal surface of the rotary
cover
→ Clean the internal surface of
the rotary cover.
The mower cuts into the soil. * Mowing height too low → Set the mower to a higher
mowing height. (See page 23)
* High swing speed → Reduce swing speed.
* Ground contours → Change the mowing pattern.
(mowing direction, etc.)
* Too many bumps and dips in
the ground
→ Set the mower to a higher
mowing height.
* Bent mowing blade → Replace the blade with a new
one. (See page 69)
Rotary cutter blade does not
rotate.
* Broken driving pin for cutter
blade driving propeller shaft
→ Replace the driving pin.
* Slip in the rotary cutter V-belt → Adjust the tension of the V-belt.
Extreme shaking * Grass accumulated in the rotary
cover and pulley
→ Clean the rotary cover and
pulley.
* Damaged belt → Replace the belt with a new
one.
* Damaged pulley → Replace the pulley with a new
one.
* Damaged blade → Replace the blade with a new
one. (See page 69)
Cutter overloaded * Poor blade balance → Replace the blade with a new
one or balance the blade
properly. (See page 69)
* Low engine speed → Increase engine speed
to maximum value.
(Check engine speed.)
* Operating speed too high → Slow down operating speed.
* Grass accumulating or coiling
around blade
→ Clean blade.
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