Jacobsen Fairway 250 JGZZ250, Руководство по эксплуатации и обслуживанию

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12 QUALITY OF CUT
Make a “test cut” to check the performance of the
mower before you start the repairs.
This area must have turf conditions that are known
and do not change across the area. This type of area
allows an accurate inspection of the performance of
the mower to be made.
Another “test cut” must be done after the repairs or
adjustments to confirm the mower performance.
Before you do a “test cut” to show the cut appearance
and performance of the mower, the following items
must be confirmed
. These items make sure that the
“test cut” is accurate.
1. Cut (Ground) Speed.
2. The Reel Bearing Condition And Adjustment
Before A Load (End Play).
3. The Reel and Bedknife are Sharp.
4. Bedknife Alignment to Reel.
5. Reel-to-Bedknife Contact.
6. Height-of-Cut (HOC).
7. Roller and Roller Bearing Condition.
12.1 WASHBOARDING __________________________________________________
NOTE: Arrow indicates direction of travel.
Washboarding is a repeated pattern of different cut-
ting heights, that causes an appearance that is like a
wave. In most cases, the wave tip-to-tip distance is
approximately 6—8 in. (15—20 cm).
A change in the colour (from light-to-dark) is also
seen. The cause of this condition can be a move-
ment from side-to-side in the cutting unit (s). This
condition is found on the mowers with cutting units
held under the machine, but other causes can give
the same result.
Another cause of Washboarding is differences in the
type of turf.
Possible Cause Solution
The cut (ground) speed is higher than normal. Decrease the cut (ground) speed.
Grass attaches to the roller. Clean the roller and use scrapers or brushes.
The roller is out of round. Replace the roller.
Cut in the same direction. Change the direction of cut when you use the ma-
chine.
A groomer is used when the final cut is made. The groomers must be used only in a straight line.
TN0159
12 QUALITY OF CUT TROUBLESHOOTING_________________________________