Massey Ferguson 5400 - Issue 1.a
06B02.9
GPA20 Heavy Duty Trumpet housings
D . Bearings and seals
Disassembly
57. Remove the trumpet housing from the rear axle
housing (see § B).
58. Remove the planet carrier (see § C).
59. Remove:
- the tab washer (9)
- the cone (8A) (idle-mounted on shaft).
60. Take the shaft (2) out of the trumpet housing.
61. Extract the cone (5A).
62. Drive off the lip seal (3).
63. Using an extractor, take out:
- the cup (5).
- the cage (4) from the seal (3)
- the cup (8).
64. Drive off the seal (7).
Reassembly
NOTE: The ring gear (22) is force fitted in the trumpet
housing (6). It is centred by the three pins (21) (Loctite
638) and tightened by the screws (17). Tighten to a
torque of 79 - 90 Nm (Loctite 242).
65. Clean the seal mating faces and the location of
cups and cones inside the trumpet and on the
shaft. Seal, cup and cone mating faces should be
free of burrs and dents.
66. Smear the external diameter of the seal (7) with
Loctite 542 (metal cage).
N
OTE: Follow the assembly order of the seal.
67. Replacing the seal (7):
without shaft replacement (2): to avoid the seal
lip from bearing on the same place on the shaft,
insert the seal 4 mm from the shoulder of the cup
(8) (Fig. 11).
with shaft replacement (2): position the seal 5
mm from the shoulder of the cup (8) (Fig. 12).
68. Lubricate the cups (8) (5) and fit them home
against the shoulder.
69. Fit the cage (4) into the base of the shoulder
(Fig. 13).
Fig. 11
Fig. 12
Fig. 13
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