Section 4: Adjustments
5/24/19
DB2660 & DBM2660 Ditch Bank Rotary Cutter 316-317M
30
Turtle/Rabbit Flow Control
Refer to Figure 4-1:
1.
Set cutter deck in transport position. Extension arm
cylinder and deck pivot cylinder should be fully
retracted.
WARNING
!
To avoid serious injury or death:
Cycle time for the deck to rotate from fully up to parallel with
the ground must not be less than 3 seconds. A cycle time less
than 3 seconds can cause damage to the equipment and cause
bodily injury or death to someone near the deck.
2.
Operate control lever to extend deck pivot cylinder
until deck is rotated down parallel with the ground.
Time how long it takes to rotate the deck down.
3.
Adjust turtle/rabbit control for the deck pivot cylinder
until cycle time is 3 seconds or longer.
Deck Leveling Front to Back
Refer to Figure 4-2:
Deck level adjustments should be made on a level
surface large enough to cover area under tractor and
deck with extension arm fully retracted.
NOTE:
If your tractor does not have flow control
(turtle/rabbit control) or if the tractor uses an open
center hydraulic system, then Flow Control Valve
Kit #316-068K must be purchased. Check your
tractor Operator’s Manual to determine your
tractor’s set-up.
NOTE:
If cutter is having hydraulic overheating
problems and turtle/rabbit flow control valve has
been set correctly, then check tractor Operator’s
Manual for power beyond hook-up.
Section 4: Adjustments
Front to Back Deck Leveling
Figure 4-2
1.
Place tractor control levers for extension arm cylinder
and deck pivot cylinder in self-cancel detent position.
2.
Fully retract extension arm cylinder.
3.
Adjust deck pivot cylinder to rotate deck top down
until it is parallel with the ground.
4.
Lower 3-point arms until deck and/or optional gauge
wheel are off the ground 2" to 3".
5.
Place a level on the cutter deck as shown in
illustration above.
6.
Adjust center 3-point link until top of cutter deck is
approximately 1/2" to 1" lower at the front than at the
back. Level should slope down to the front.
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IMPORTANT:
The front blade tip should be lower
than rear blade tip by 1/2" to 1". The cutter is subject
to continuous material flow under the deck if rear
blade is at the same height or lower than the front
blade. This will cause horsepower loss, grass
clumps, blade wear, and frequent blade sharpening.
Cycle Time (Fully Retracted to Horizontal)
Figure 4-1
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