Massey Ferguson 5400 - Issue 1.a
07E01.3
GPA20 - GSPTO
A . General
Tractors can be fitted with GSPTO.
Unlike the independent PTO system where PTO
speed depends on the engine speed, GSPTO is driven
by the rear differential drive pinion and the PTO shaft
speed is proportional to the ground speed of the
tractor.
B . Operation
The drive pinion comprises a pinion (31) constantly
meshed with either the pinion (16) (2WD), or the bell
gear (33) (4WD). The sliding gear (10) allows to mesh
the shaft (8) in rotation with shaft (18) (2WD) or shaft
(32) (4WD). The pinion (3) fitted at the end of shaft (8)
drives the 540 rpm pinion of the rear PTO shaftline.
The movement of the sliding gear (10) is obtained by a
pad articulated on a pin fitted to the left in the lower
part of the rear axle housing and controlled by a link
and a cable operated by a lever in the cab.
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