Massey Ferguson 5400 - Issue 1.a
07D01.3
GPA20 shiftable shaft
A . General
The driven pinions (4) (7) are fitted on the PTO shaft
(13) located on the lower rear part of the axle housing.
These driven pinions are constantly meshed with the
double driving pinion driven by the upper shaftline
whose drive is transmitted by the power take-off
clutch.
The power take-off shaft is freely mounted into the
bearing (2) and force fitted into the bearing (10). The
bearings are fitted into the rear axle housing and
housing unit respectively (14).
The coupler hub (5) is integral with the shaft (13) via
splines. These pinions (4) (7) drive the shaft when the
coupler (5) is moved either forwards (540 rpm) or back-
wards (1000 rpm). When one of the pinions (4) or (7),
equipped with rings (19) (20) is passive, it turns either
on the ring (3) or on the shaft (13).
A control fork (25) fitted to the pin (22) makes it
possible to select speeds of 540 or 1000 rpm.
Tightness is obtained via the sealing ring (11) and the
O'ring (18). The deflector (12) prevents contamination
by foreign particles.
Depending on the version, the power take-off shaft
may be supported by taper roller bearings.
Another version provided with a flange shaft makes it
possible to rapidly change the end-fitting (32) (6 or 21
splines).
Lubricating the pinions (4) (7)
The transmission oil provides lubrication for the two
pinions.
The bearing (2) has a sealed face turned towards the
540 rpm pinion. Lubrication of pinions is obtained via
the oil slave device (1) and the shaft (13) provided with
an axial channel and drilled radial ports.
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