MASSEY FERGUSON 5400 - General

Massey Ferguson 5400 - Issue 1.a
05C01.3
GBA20 mechanical reverse shuttle
A . General
The mechanical reverse shuttle transmits drive from
the Speedshift to the drive pinion (1) of the gearbox
(Fig. 1).
The mechanical reverse shuttle assembly is located in
the rear housing of the input unit, behind the Speed-
shift.
It comprises (Fig. 2):
- two helical pinions (forward operation (5) and reverse
operation (23)) fitted on the needle bearing (6) and
(20);
- a double cone synchromesh (18) whose hub (2) is
splined to the secondary shaft;
- a secondary shaft (19) fitted on two ball bearings and
supported by the two bearings of the reverse shuttle
unit;
- a selector rail / synchromesh control fork assembly;
- a double transfer pinion (15) constantly meshed with
the reverse pinion (23) and the drive pinion (1) of the
gearbox.
MA-05-05035A
1
Fig. 1
19
23 18 5 2
20 6
MA-05-05036A
23
15
Fig. 2