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OPERATION AND MAINTENANCE
Hydraulic Gang Adjust System
The VT Plus is equipped with a rephasing hydraulic gang
adjust system to vary disc gang angles in the field.
Figure 4-3: Hydraulic Leak Detection
Escaping hydraulic fluid can cause serious
personnel injury. Relieve system pressure before
repairing, adjusting, or disconnecting. Wear
proper hand and eye protection when searching
for leaks. Use cardboard instead of hands
Figure
4-3.) Keep all components (cylinders,
hoses, fittings, etc.) in good repair.
1. The rephasing gang adjust system contains smaller
wing frame cylinders plumbed in series with larger
center frame cylinders. It is important that the
cylinders be connected in the proper series for the
gang adjust system to operate correctly. When the
cylinders are fully extended and held in this position,
oil is able to flow through the cylinders (or rephase)
and allow the cylinders to operate in sync. This also
allows the system to purge any air that may enter the
system without having to loosen or crack hydraulic
lines.
4-4
WARNING
(See
2. The hydraulic system is not filled with oil and should
be purged of air before field operations. Carefully
hitch the VT Plus to the tractor and connect the
hydraulic hoses. Check to make sure the tractor
hydraulic reservoir is full of the manufacturer's
recommended oil. Slowly adjust the gang angle and
continue to hold the hydraulic lever until all cylinders
are fully extended. Fully extend and retract cylinders
to verify that all cylinders are working simultaneously
throughout the stroke. If the cylinders are not working
evenly or together, fully extend the cylinders and
continue to hold the lever to purge any remaining air.
Do not loosen any hoses or fittings. Recheck tractor
reservoir to make sure it is within operating limits.
3. Always fully extend the cylinders and hold the lever to
ensure the cylinders are rephased before starting
any field operation. This will keep all cylinders in time
and disc gang angles the same while operating.
5
F-987-0519
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