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Massey Ferguson 5465, 6465, 6475, 6480 - Carraro front axle transmission shaft bearings
The MF 5465, 6465, 6475, 6480 tractors are fitted with a fixed Carraro
front axle. Drive is transmitted from the front axle clutch located in
the rear axle via a transmission shaft. On 6-cylinder tractor engine
models, the transmission shaft has a universal joint and the front axle
pivot is raised. The shaft is divided into two sections. The section
linked to the 4WD unit by a sleeve is fixed.
The front part of the tractor transmission shaft has a universal joint,
allowing the axle to oscillate on its raised pin. The two sections of
the transmission shaft are linked by a castellated nut (11) and
supported by a bearing (6) at gearbox level. The front frame supports
the front axle pivot. The pivot front bearing is removable on all
models, while the rear bearing is part of the front frame assembly.
Parts list (Carraro 20.19 front axle) - (1) Straight
shaft (2) Guard (2A) Guard (3) Sleeve (4) Screw (5) Central bearing (6)
Bearing (7) Dust seal nut (8) Spider (9) Shaft (10) Sleeve (11)
Castellated locknut (12) Front frame (13) Chamfered washer (14) Washer
(15) Front bearing (16) Seal (17) Ring (18) Ring (19) Plug (20) Circlip
(21) Screw (22) Front axle (23) Grease nipple (24) Union (25)
Lubrication pipe (26) Flanges (27) Screw
MF 5465, 6465, 6475, 6480 - Disassembling and
reassembling the 4WD transmission shafts and the universal joint spiders
Disassembling the universal joint shaft - Chock the rear wheels and
apply the hand brake. Remove the guards (2) (2A). Unscrew the dust seal
nut (7). Remove the screws (27) and the flanges (26). Move the universal
joint shaft (9) and spider (8) assembly away from the drive pinion
carrier. Remove the shaft. If there is not enough room to push the
universal joint shaft backwards for removal, disassemble the central
bearing and the straight shaft (1). The spiders are replaceable. They
are listed in the parts book.
If the spiders need to be replaced, carefully check the condition of the
end clevises where the spider catches are located. Remove any traces of
impact or sharp edges. Thoroughly clean the groove of each circlip.
After assembly, check that the circlips are properly positioned in their
respective grooves. If necessary, and to facilitate mounting of the
universal joint shaft on the drive pinion carrier, raise the front
wheels using a jack with sufficient lifting capacity, positioned along
the axis of the axle housing.
Replace the dust seal nut (7). Use a makeshift tapered tool to refit the
dust seal nut (7) on the shaft (1). Smear the front splines of the
straight shaft with molybdenum sulphide grease or equivalent. Refit the
universal joint shaft (9). Attach the front spider (8) to the plate of
the drive pinion carrier using the flanges (26) and washer-head screws
(27) that have been lightly smeared with Loctite 241 or equivalent and
tightened to a torque of 34-41 Nm. Moderately tighten the dust seal nut
(7). Using a grease gun, lubricate the sleeve (10) and refit the guards
(2) and (2A).
Massey Ferguson 5465, 6465, 6475, 6480 -
Straight shaft and bearing
Disassembling - Remove the guards (2) (2A) and the universal joint shaft
assembly. Remove the screw (4) and slide the sleeve (3) towards the
front of the straight shaft. Remove the central bearing (5), bearing (6)
and straight shaft (1) assembly. Separate the support (5) from the
bearing (6). Unscrew the castellated nut (11) using a suitable wrench.
Remove the bearing from the straight shaft.
Reassembling - Check the parts. Replace those that are defective.
Install bearing (6) on the straight shaft with the offset turned
rearwards. Tighten the nut with a suitable wrench. Assemble the support
(5) on the bearing (6). Tighten the screws. Reinstall the central
bearing, bearing (6) and straight shaft (1) assembly. Smear the rear
splines of the straight shaft (1) with molybdenum sulphide grease or
equivalent. Slide the sleeve (3) towards the rear of the straight shaft.
Refit the screw (4). Replace it if it is in a poor condition. Reinstall
the universal joint shaft assembly. Reinstall the guards (2) (2A).
Massey Ferguson 5465, 6465, 6475, 6480 -
Removing and install the bearing support and Carraro front axle
Remove the 45 kg front weights (if fitted). Immobilise the MF 5465,
6465, 6475, 6480 tractor. Apply the hand brake. Place safety chocks on
either side of the rear wheels. Some tractors may be fitted with a front
power take-off. In this case, it will be necessary to remove it in order
to separate the front axle from the frame (12). In certain conditions,
the centre weight (1) of 100 kg may obstruct the removal of the bearing
support. For this configuration, strip out the internal parts at the
lower part of the grille to gain access to the weight. Take out the
central M20 screw (2) and lift the weight slightly using a suitable
lifting tool to release it from the support.
Removing the support (15) and the front axle. Remove the guards (2)
(2A). Raise the tractor along the axis of the front axle housing using a
jack with sufficient lifting capacity. Remove the front wheels. Mark the
steering hoses connection and detach them from the ram. Disconnect the
front differential lock control hose. Sling the front axle using
suitable straps. Remove the screws (21). Pull the front axle assembly
complete with bearing support (15) forwards along the axis of the axle
beam (position 1) and remove the front axle (position 2). Note the
features, order and position of the washers (13) (14) and the direction
of the chamfers and remove them.
Clean all components and check the condition of: the pivot pin at each
end, the washers (13) (14), the friction rings (17) (18), the seal (16).
Slide the washers (13) (14) lightly smeared with bearing grease onto the
front and rear ends of the pivot pin. Position the washers in the order.
Sling the front axle. Moderately lubricate the ends of the pivot pin and
Install the support (15) at the front of the pivot pin. Before refitting
the front axle assembly, check that there is no excess grease in the
cavity of the second axle beam pivot on the front frame.
When refitting the front axle assembly, any such excess grease will be
compressed, and may hinder insertion of the pivot pin into its bearing.
Reinstall the front axle and support (15) assembly. Push the assembly
hard until it comes into contact with the second axle beam pivot. Thrust
the support (15) against the front axle assembly (22) to eliminate the
clearance between supports and axle housing as much as possible. Install
the screws lightly smeared with Loctite 270 or equivalent and tighten to
a torque of 520-640 Nm.
Check that the front face of the pivot pin is almost level with the
front edge "F" of the bearing support (15). Visually check for the
presence of the grease nipple on the left-hand side of the front frame
(12) (second axle beam pivot) and on the support (15) (first axle beam
pivot). Reconnect the hoses (using marks made during disassembly): of
the steering ram, of the front differential lock. Reinstall the wheels.
Remove the axle stand and take away the jack. Tighten the nuts to a
torque of 640-680 Nm. Reinstall the centre weight. Tighten the central
screw to a torque of 100-150 Nm and secure the front weights (depending
on equipment fitted). Reinstall the universal joint shaft and the
guards. Remove the safety chocks and release the hand brake. Using a
grease gun, lubricate the friction rings (17) (18) of the axle beam
pivots.
MF 5465, 6465, 6475, 6480 - Replacing the
friction rings and seal
Front bearing
Disassembling - Only remove the bearing support (15). Extract and
discard the ring (17). Drive out and discard the seal (16).
Reassembling - Clean and check all components. Replace those that are
defective. Check that the lubrication lines in the support are not
blocked.
Using a press and a suitable fixture, Install the seal (16), positioned
correctly, and the ring (17) level with face "F" of the support (15),
with the lubrication port "T" connecting with the line.
To work on the ring (18) of the second axle beam pivot, the first axle
beam pivot and the front axle must be removed.
Rear bearing
Disassembling - Drive out the ring (18) using a makeshift tool. The
circlip (20) and the plug (19) are not considered to be wearing parts.
It is therefore unlikely that they will need replacing.
Reassembling - Using a makeshift fitting drift, Install the ring (18)
onto the frame (12) level with the chamfer "C".
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MF TRACTORS SPECIFICATIONS |
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MF FRONT END LOADERS |
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MF TRACTORS MAINTENANCE |
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MF TRACTORS TROUBLESHOOTING | ||||
1652 | 1749 | 2620 | 2725 | 2805 |
3050 | 3120 | 3640 | 3709 | 4245 |
4455 | 5320 | 5455 | 5613 | 6150 |
6280 | 6480 | 6615 | 7618 | 7720 |