Bobbing
Description
Bobbing is a rocking movement of the cutting unit
leaving an unacceptable wave like appearance. This
could be all or one of the cutting units. Indications
include color variations with the appearance of light
and dark patches. This pattern is often identified by
the wave tips being approximately six to eight inches
tip to tip.
Bobbing
Causes of Bobbing:
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Ground speed is too fast
Inconsistent turf density
Ground is not level
TIP
Grass build up on roller
Bobbing can be
misidentified due to
differences in turf
density or grass types
causing a bobbing
appearance. Verify
there is a HOC
Cutting unit weight bias (not using or misadjusted turf
compensation system)
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Counterbalance/down pressure set wrong (too light on ground)
Out of round rollers
Loose suspension of roller causes inconsistent forward speed
Cutting unit is not tracking with traction unit
Mowing in the same direction continuously
Grain
difference in the area
of the pattern.
Using groomers on the cleanup pass
Possible Corrective Actions:
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Slow ground speed (allows cutting unit time to compensate for density changes)
If turf density varies and matches the cut pattern, apply turf remedies for consistent density
(dethatch, verti-cut and aerate)
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Limit access to turf when wet
TIP
Verify roller condition, use scrapers or brushes to clean rollers
Use (or adjust) turf compensation springs
Change the mowing
direction 90o. If the
pattern follows the
mow direction, the
bobbing may be
caused by the cutting
unit. If not, the
pattern is likely due
to turf variations.
Adjust counterbalance/down pressure for more weight on turf
Insure cutting unit suspension is in good working condition
Insure the cutting unit is tracking parallel to traction unit travel
Change mowing direction frequently
See the section on Grain
Use the Groomers in a straight line because turning while in use
may cause the cutting unit to track incorrectly.
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Ensure cutting unit is tracking parallel to traction unit travel.
Change the roller type to reduce rolling resistance.
TORO® Service Training
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