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3. HYDRAULIC – To set the depth of the hydraulic disc
gangs
"Hydraulic Disc Gang System" on
page
4-4, first fully extend the disc gang cylinders
and hold the tractor lever at least 30 seconds. This
will fully charge and rephase the disc gang
hydraulics. Remove any Stroke control segments and
fully retract all disc gang cylinders.
a. Adjust the center frame cylinder anchors until
there is 9" between the top of the 22" disc gang
blades and the bottom of the frame
Figure
4-10.
b. Adjust the wing disc gangs to match the center
disc gangs by adjusting the cylinder anchor at
the base of each wing frame gang cylinder. This
will ensure that all disc gangs are set evenly
across the machine.
c. Fully extend and rephase the hydraulic gang
cylinders before starting each field operation.
This will keep all cylinders in sync and gang
depths consistent.
4. STROKE CONTROL SEGMENTS – Are provided for
hydraulic disc gangs. To adjust operating depth,
install the segments on the master cylinder rod (left
center disc gang cylinder) to set maximum operating
depth. Set when the cylinders are extended 2"
(approximately 4-1/2" stroke control segments), the
disc gang will operate at the recommended 7-1/2"
below the frame position.
Figure 4-11: Disc Gang Operation
Disc Gang Assembly
1. The disc gangs are assembled using 1-3/4" diameter
gang shaft. Spring-loaded end collars are used on
each end of the disc gangs to maintain clamping
force of the gang shaft. Slotted hex nuts are installed
at both ends of the disc gangs to allow service from
either end.
2. When disassembling a disc gang, note the locations
of the bearings and tapered blades. Remove the 3/8
See
roll pin from the end of the gang shaft and clean any
remaining soil or debris from the gang shaft threads.
Closed-end gang shaft wrenches are provided on the
center frame to fit the gang nuts. An additional
extension or cheater pipe may be required to loosen
the gang shaft.
3. When reassembling the disc gang, remove any soil
or mud from the disc blades and spools to ensure a
clean surface when tightening the gang.Clean the
gang threads and install the gang nut. Torque the
disc gang shaft to a minimum of 1250 ft-lbs
See Figure
Disc blades are extremely sharp. Exercise
extreme care when working on or near disc
blades. Do not allow discs to roll over or fall onto
any bodily part. Do not allow wrenches to slip
when working near disc blades. Never push
wrenches toward disc blades. Do not climb over
machine above disc blades. Failure to stay clear
of disc blade edges can cause serious personal
injury or death.
Figure 4-12: 1,250 Foot-Pounds of Torque
OPERATION AND MAINTENANCE
4-12.
DANGER
5 FOOT
EXAMPLE:
5FT X 250 LBS. = 1250 FT-LBS.
250
POUNDS
PULL
4-11
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