MASSEY FERGUSON MF 135 - Position and Pressure Control

Inner Quadrant Control Lever
{See Figs. 19 and 20)
The Inner Quadrant has three ranges:
(1) Position Control, (2) Constant Pumping
and (3) Pressure Control (optional). One
Inner Quadrant Lever performs a different
function in each of the three ranges. The
operation of the Inner Quadrant Lever in each
of the three ranges is as follows:
When to Use Position Control
The Position Control range is used for
operating 3-point hitch mounted tools that
are not Draft Controlled, such as soil
scoops, post hole diggers and cranes. Im-
plements of this type may be held at a fixed
height, depth or intermediate position, re-
gardless of Draft loads, thus establishing an
infinite number of lower link positions which
correspond to the inner quadrant lever.
Fig. 23 - Using Position Control
Using Position Control {See Fig. 23)
When operating in the Position Control
Range, place the Draft Control Lever in the
rully raised position.
Shift the inner quadrant lever to the Po-
sition Control Range, and establish a trans-
port stop by moving the stop for the Pressure
Control Range to the upper end of the slot.
This will provide the correct setting of the
inner quadrant lever for transport when op-
erating in Position Control. The inner quad-
rant lever may be used to raise, lower and
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operate 3-point hitch implements that are
not Draft Controlled.
Moving the inner quadrant lever toward
"transport" position will raise the imple-
ment. Moving the inner quadrant lever to-
ward "down" position will lower the imple-
ment. Locating the inner quadrant lever at
intermediate positions within the Position
Control range will locate the lower links at
corresponding intermediate positions. The
quadrant has an adjustable stop that allows
the operator to return the inner quadrant
lever from transport to the same desired op-
erating position.
When to Use Pressure Control
{Optional)
A Universal Pressure Control Hitch (Ac-
cessory) is required to use Pressure Con-
trol.
Pressure Control is used with pull-type
implements to provide tractive weight as
required. The portion of implement weight
that is transferred to the drive wheels by use
of Pressure Control results in a near propor-
tionate transfer of weight from the front of
the Tractor and the implement. When using
Pressure Control and Draft Control, front
end weights are normally required to main-
tain Tractor front end stability.
The amount of implement weight to be
transferred to the Tractor rear wheels is
determined by the position of the inner quad-
rant lever in the Pressure Control range.
Movement of the inner quadrant lever will
increase or decrease the hydraulic pressure
in the system. For a given setting, the
Pressure Control System will maintain the
desired amount of weight transferred to the
Tractor rear wheels by maintaining a con-
stant pressure, even as the Tractor and im-
plement crosses uneven field conditions.
Using Pressure Control (Optional)
(See Fig. 24)
Move the inner quadrant lever to the
low pressure area of the Pressure Control
range. Move the Draft Control Lever to the
fully raised position. Pull-type implements,