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E . Replacing the taper roller bear-
ings and the layshaft
Disassembly
21. Remove the shaft (54) and pinion assembly (see
§ C).
22. Extract the bearings cones (53) and (63); Discard
them.
23. If necessary, replace the shaft.
Reassembly
24. If the shaft (54) has been replaced:
Using a suitable fixture and a press, insert a new
needle roller bearing (62) thrust up against the
shoulder of the shaft. Check needle rotation after
assembly.
25. Reassemble the pinions (see § D).
26. Fit bearing cones (63) and (53) using a press and a
suitable fixture.
27. Position the shaft, assembled with related pinions,
in the housing (see § C).
28. Shim the shaft (see § G).
F . Shimming the pinions
R
: Pinions shall be stacked temporarily
EMINDER
without shims (58).
29. Measure the space between the 1st pinion (60)
and the 2nd pinion (59) using a set of shims
30. Depending on the measured distance, choose
shims of an appropriate thickness to obtain clear-
ance J1 = 0 to 0.25 mm
31. Remove circlip (61), opening it up as little as
possible, and remove pinion (59).
32. Slide the final shims, previously selected, onto the
shaft. Install the pinion and correctly fit the circlip.
33. Fit bearing cone (63) (see § E).
34. Install the shaft, assembled with related pinions, in
the housing (see § C).
Massey Ferguson 5400 - Issue 1.a
GBA20 layshaft with Power Shuttle
(Fig.
4).
(Fig.
4).
J1 = 0 / 0,25 mm
59
MA-05-06026A
60
Fig. 4
05I02.7
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