Massey Ferguson 5400 - Issue 1.a
05D02.9
GBA20 Speedshift with Power Shuttle
B . Operation
Mechanical action: boosting
In this position (Fig. 4), the hydraulic devices are not
supplied and the Speedshift operates in a mechanical
manner. The oil in the chamber of pistons (28) and (48)
returns to the housing via channel "C" and the solenoid
valve mounted on the power shuttle clutch unit. This
clutch unit is located to the front right-hand side of the
gearbox (see chapter 9).
As the oil pressure has dropped, the planet carrier (50)
is locked in rotation by the Belleville washer (18) which
compresses the intermediate plate (20) and immobi-
lises disc (21) splined with the planet carrier assembly.
Drive from the primary shaft (36) is fed to the input sun
gear (7) splined to the shaft. The sun gear (7) drives the
double pinion gears (12) idle-mounted on shafts (8).
The pinion gears in turn drive the output sun gear (6)
firmly attached to the secondary shaft (5), gear ratio
1.26.
48 12 8
C
28
36
7
21
20 18
6
5
50
MA-05-00359B
Fig. 4
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