MASSEY FERGUSON 5400 Service Manual page 174

GBA20 selector rails with mechanical reverse shuttle
Disassembly
49. Remove the plugs (1), the springs (2) and the
locking studs (3) (Fig. 2
N 1: The locking studs are now extended
OTE
(Fig. 2 and Fig. 3). This modification improves their
guiding into the forks (5) and (6) and also into the
buttons (1).
N 2: To optimise operation, a decompression
OTE
spring on the locking stud drives out the oil
enclosed in the spring chamber (2). This design
allows the stud to enter and exit the fork more
smoothly, thus improving gear shifting.
50. Take out set screw (8)
51. Drive out the cup plug (9) forwards by striking the
rear of the selector rail (7)
52. Place the Tortoise and Hare fork (20) in the Hare
position.
53. Remove the adjusting screws (19).
54. Remove the screws (16) and the cover (15).
55. Take out the Hare and Tortoise piston (13) and
discard the O' rings.
56. Take off the cylinder (10) and discard the O' ring.
57. Turn the pump breather pipe (1) upwards (open
centre Fig. 16).
58. Move the selector rail (7) to the rear in order to
release the forks.
Slide the selector rail under the rear axle housing
reinforcement (Fig.
59. Extract the 1st - 2nd and 3rd - 4th forks.
60. Extract the Hare and Tortoise fork.
61. If necessary, disassemble the stop (18).
62. Take the selector rail out through the selector
cover aperture by passing it through the Hare /
Tortoise cylinder bore
05F01.16
and Fig. 3).
(Fig. 15).
(Fig. 15).
16).
(Fig. 17).
Fig. 15
Fig. 16
Massey Ferguson 5400 - Issue 1.a