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10 QUALITY OF CUT
10.1 QUALITY OF CUT TROUBLESHOOTING ___________________________________
It is recommended that a "test cut" be performed to
evaluate the mower's performance before beginning
repairs.
An area must be available where "test cuts" can be
made. This area must provide known and consistent
turf conditions to allow accurate evaluation of the
mower's performance.
Another "test cut" must be performed after the com-
pletion of the repairs and/or adjustments to verify the
mower's performance.
10.2 WASHBOARDING _____________________________________________________
NOTE: Arrow indicates direction of travel.
Probable Cause
Mowing (ground) speed is too fast.
Grass build-up on roller.
Roller is out of round.
Mowing in the same direction.
Cutting units have too much or too little weight on them.
Insufficient engine speed, not set to specification.
Hydraulic system and/or rotary drive motor performance is
reduced.
en-90
Before performing a "test cut" to diagnose cut appear-
ance and mower performance, the following items
must be verified to ensure an accurate "test cut."
1.
Mowing (Ground) Speed
2.
Blade Sharpness
3.
Height-of-Cut (HOC)
4.
Roller and Roller Bearing Condition
5.
Blade Speed
Washboarding is a cyclical pattern of varying cutting
heights, resulting in a wave-like cut appearance. In
most cases, the wave tip-to-tip distance is approxi-
mately
6—8 in. (15—20 cm). Colour variation (light-to-dark)
may also be noticed.
This condition is usually caused by a rocking motion
in the cutting unit(s). This condition is found mostly
on mowers with multiple (suspended) cutting units,
but other causes can produce the same result.
Washboarding may also be caused by variations in
the turf.
TN0159
Reduce mowing (ground) speed.
Clean the roller and scraper.
Replace roller.
Change mowing direction regularly.
Use weight transfer switch to transfer weight on or off cutting
units. (Refer to Maintenance Section.)
Check/adjust engine speed. (Refer to Maintenance Section.)
Check hydraulic system performance (pump output, motor
operation, valve operation, relief valve settings, etc.).
Remedy
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