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Ferguson Tractor TO-20 Operation and Maintenance Manual

FERGUSON SYSTEM (Cont'd)
The implement is attached to the tractor with two
bottom
links which PULL, and by a top link
which
PUSHES
FORWARD
and
DOWN-
WARD
above the rear axle-making tractor and
implement a single unit. The built in hydraulic
system provides
both
Finger Tip and Automatic
Implemtnt
Control and an exclusive Automatic
Overload Protection.
The Ferguson Linkage is raised and lowered by
a hydraulic pump, driven by the power take-off.
The Finger Tip Control Lever manually con-
Left-
finger Tip Control position for carrying implement.
Right-finger
Tip Control in position to operate imple-
ment at maximum depth.
trols
the flow of oil to ram cylinder. The master
control spring assembly automatically regulates
thi� flow in operation.
When the implement
is in transport position,
the hydraulic ram cylinder is full of oil. When
control lever is moved forward, oil is released
from the cylinder, permitting implement to be
lowered
by its
own weight. When implement
reaches desired depth ( controlled by Finger Tip
Lever position), oil release from the cylinder is
Phantom
diagram reveals details of Ferguson System's
complete hydraulic system. (A) finger Tip Control Lever.
(8) Moster Control Spring. (C) Rom Cylinder and Piston.
(D) Power Toke-Off.
28
automatically stopped-implement remaining
at
the
established depth
if soil texture remains
un-
changed. On uneven ground, expansion and com-
pression of master control spring regulates the
cylinder oil flow. When soil texture changes, its
weight and resistance
requires more or less
traction -
automati-
cally provided
by
changing weight
and
resistance of soil on
the moldboards.
Large variations in
soil texture require ad-
justment
of
Finger
Tip Control to main-
tain desired depth.
Master
control spring regu-
lates oil flow of hydraulic
system-maintains uniform
depth of implement.
The hydraulic sys-
tem remains inopera-
tive
until the power take-off lever is engaged.
Note: During extremely cold weather, sluggish opera-
tion
may be experienced until the oil warms up.
SAFER OPERATION
Should the implement strike
a
hidden object,
oil
pressure
within
the
ram cylinder is auto-
matically released,
thereby automatically
removing the
imple-
ment weight from the
tractor
,
reducing the
traction on the rear
wheels and indirectly
The leveling crank levels
reducing
the pull
on
the
attached
implement
.
the
implement.
This
automatic safety feature protects operator, trac-
tor and implement.
ATTACHING
IMPLEMENTS
When
attaching a
Ferguson implement :
1. Back the tractor so that it is centered
with
the implement.
2.
Lower the links by Finger Tip Control.
3.
Attach the left bottom link.
4.
Attach the right bottom link, using the lev-
eling
crank to bring the ball joint in line
with the connection.
5.
Attach top link to the implement.
6. When
seated on the tractor, attach top link
to
the
tractor, moving tractor slightly
backward or forward to line up connection
for the front pin.
Note: The right lift rod is marked by a circular
groove which, when level with the top
of the fork into which it threads, indi-
cates that both lower links are level.