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4-3 ATTACHING TO THE TRACTOR
4-3.1
Align the tractor drawbar with the ma-
chine. Raise or lower the disc ring hitch, as
needed, using the swivel jack. Attach the unit
with proper size hitch pin.
4-3.2
Always place the swivel jack on the inte-
rior mount before setting the machine in mo-
tion.
4-4 HYDRAULIC LIFT SYSTEM
The VT Plus is equipped with a rephasing hy-
draulic lift system to raise and lower the unit in the
field.
Figure 4-2 Hydraulic Leak Detection
4-3.3
Clean all hydraulic couplings and attach
to the tractor.
4-3.4
Fully extend the hydraulic lift wheel cyl-
inders, and place the cylinder lockouts in the
transport lock position over the cylinder rods.
Secure the lockouts with the lockout pins.
WARNING
ESCAPING HYDRAULIC FLUID CAN
CAUSE SERIOUS PERSONNEL IN-
JURY. RELIEVE SYSTEM PRESSURE
BEFORE REPAIRING, ADJUSTING, OR
DISCONNECTING. WEAR PROPER
HAND AND EYE PROTECTION WHEN
SEARCHING FOR LEAKS. USE CARD-
BOARD INSTEAD OF HANDS (SEE FIG-
URE 4-2). KEEP ALL COMPONENTS
(CYLINDERS, HOSES, FITTINGS, ETC.)
IN GOOD REPAIR.
4-4.1
The rephasing hydraulic lift system con-
tains 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 lift system to op-
erate 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.
4-3
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