Massey Ferguson 5400 - Issue 1.a
08E01.11
GPA20 multidisc 4WD clutch
55. In order to correctly “seat” the cones in their
bearing cups, to obtain clearance:
J2 = 0 to 0.10 mm, fit the cone (14), the shaft (25),
and the cup (18).
56. Protect the splines of the shaft.
57. Fit the bearing (22) and circlip (23).
58. Put a dial gauge feeler pin against the end of shaft
(25) (Fig. 11).
59. Pull the shaft, turning it alternately from right to left
to correctly seat the cones in the cups.
60. Reset the dial gauge to zero.
61. Repeat the operation 59, this time by pushing.
62. Depending on the clearance measured, select the
thickness of shim(s) (20) required to obtain J2.
63. Remove the circlip (23), cap (22), cup (18) and the
shaft (25).
64. Fit the seal rings (12) in the shaft grooves (25) and
hook their ends. Ensure that they turn freely.
65. Fit the cone (14) into the bearing cup (13). Install
the shaft (25) after positioning the clutch assembly
(16) and bell gear (15) in the housing.
66. Fit the cup (18) and shim(s) (20) (smeared with
grease) selected at operation 62.
67. Fit the O’ring (21) in the housing groove.
68. Fit the cap (22) and circlip (23), remove the spline
protection on the shaft.
69. On tractors with reinforced sealing, grease and
position the seal (26), with the lip turned towards
the cap (22). Remove the protection.
70. Fit the flange (28), ensuring that operational clear-
ance remains between the flange and housing.
71. Tighten the screw (27) after coating it with Loctite
241.
72. Clean and degrease the mating face of the cover
(17) and housing.
73. Smear the mating face of the cover with a sealing
product (Loctite 510 or equivalent).
74. Screw two opposing guide studs into the housing.
75. On tractors fitted with GSPTO, check the position
of the lever (4). Fit the retainer pipe (1), locking stud
(2) and spring (3) (Fig. 3).
76. Refit the cover (17).
77. Remove the guide studs, and fit and tighten
screws (10) to a torque of 130 - 170 Nm.
78. Smear the two sleeves of the 4WD transmission
shaft with “Anti Seize” grease or equivalent.
Refit the transmission shaft and guard, and recon-
nect the two front differential lock hoses.
Refit the lubricating pipe of the power shuttle or
engine clutch.
79. Top up the rear axle oil level and remove shims.
80. Check clutch operation and GSPTO control adjust-
ment (if fitted).
81. Check for tightness:
- the mating faces of the cover under the rear axle
housing
- the right-hand hydraulic cover (if removed)
- the hydraulic unions.
Fig. 11
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