Quality Of Cut Troubleshooting; Quality Of Cut Problem Solving; Washboarding - Jacobsen AR3 Manual De Seguridad, Funcionamiento Y Mantenimiento

11 PROBLEM SOLVING

11.2 Quality of Cut Troubleshooting

It is recommended that a "test cut" be performed to evaluate the mower's performance before beginning repairs.
An area should be available where "test cuts" can be made. This area should provide known and consistent turf
conditions to allow accurate evaluation of the mower's performance.
Another "test cut" should be performed after the completion of the repairs and/or adjustments to verify the
mower's performance.
Before performing a "test cut" to diagnose cut appearance and mower performance, the following items should
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

11.2.1Washboarding

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 specifica-
tion.
Hydraulic system and/or rotary drive motor
performance is reduced.
en-66
NOTE: Arrow indicates direction of travel.
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
approximately 6—8 in. (15—20 cm). Color 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.Washboarding may also be caused by
variations in the turf.
Remedy
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 Parts & Maintenance Manual.)
Check/adjust engine speed. (Refer to Parts & Maintenance
Manual.)
Check hydraulic system performance (pump output, motor
operation, valve operation, relief valve settings, etc.).