MASSEY FERGUSON 5400 - Page 183

Massey Ferguson 5400 - Issue 1.a
05F01.25
GBA20 selector rails with mechanical reverse shuttle
Adjusting the fork (Fig. 28 and Fig. 29)
Adjusting principle
The positioning of the fork (6) is obtained by the differ-
ence between the centre line "Y" of the holes and the
centre line "Z" of the indents on the selector rail (5). A
different fork movement is obtained by acting either on
the front screw or on the rear screw (3) according to
the adjustment required (Fig. 29).
115. Fit the locking stud (5), spring (8) and plug (7).
Tighten the plug to a torque of 50 - 70 Nm.
I
MPORTANT: When disassembling all locking studs
(gearbox and input unit), the positioning of the
reverse shuttle selector rail locking stud must be
respected (see operation 110).
116. Lightly smear the thread of the fork screws with
Loctite 242 or equivalent. Fit the screws.
117. Position the locked fork towards the front.
Maintain the synchromesh sliding coupler up
against the pinion.
Pre-adjust the fork using the above-mentioned
principle.
118. Check that the front pads of the fork are not driven
hard against the synchromesh sliding coupler.
119. Repeat the operation (fork locked at rear).
Check that the pads of the fork are not driven hard
against the synchromesh sliding coupler.
The correct adjustment is obtained when the clear-
ance of both (front and rear) fork pads are nearly
equal in the synchromesh sliding coupler, in both
the forward and reverse positions.
120. Alternately and gradually tighten the screws (3) to
a torque 35 Nm without modifying the fork adjust-
ment.
7
6
3
1
4
8
5
2
MA-05-05032A
Fig. 28
Y
Z
5
6
3
MA-05-05033A
Fig. 29