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Massey Ferguson 5445, 5455, 6455, 6470 - Dana Front Axle
Dana Front Axle may be fitted on the MF 5445, 5455, 6455, 6470 tractors.
The front axles mounted on the 4WD tractors consist of: 1) centre
housing containing the differential unit and the differential lock
system, as well as the transmission shafts, 2) at each end, a hub
assembly containing the final drive units. The front axle is assembled
to the front frame of the tractor by means of a pivot which adapts to
the unevenness of the ground. Drive is transmitted from the rear axle to
the front axle by a transmission shaft. Engagement is ensured by an
electro-hydraulically controlled multidisc clutch. The differential unit
is held by two half-bearings mounted on a suitable support allowing the
crownwheel and pinion to be adjusted. The bevel gear is supported by two
bearings and is adjusted using shims. The wheel hubs containing the
final drives are held in place by two tapered roller bearings and driven
by a hydraulically-controlled steering gear.
Dana Front Axle AG 85-105B
Parts list - (1) Axle housing (2) Final drives (3)
Steering pivot (4) Input shaft (5) Pinion (6) Differential
Dimensions for Dana Front Axle AG85 (MF 5425, 5435, 5445, 5455,
6445, 6455 tractors)
A = 1869, B = 220.8, C = 315, D = 1669, E = M18x1.5, F = 275, G = 79.90,
H = 95
Dimensions for Dana Front Axle AG105 (MF 5460, 6460, 6470
tractors)
A = 2020, B = 220.8, C = 315, D = 1800, E = M18x1.5, F = 275, G = 79.90,
H = 95
Specification AG85 / AG105
Differential - 8 / 33 (1 / 4.125)
Final drive - 1 / 4.6
Total reduction - 1 / 18.975
Unladen weight - 260 kg / 270 kg
Input direction of rotation - Anti-clockwise
Differential type - Dog clutch lock, hydraulic control
Max. inner/outer steering angle - 55 / 39 deg
Oil specification - SAE 85W90
Differential oil capacity - 5.5 / 6.8
Final drive unit oil capacity - 0.9 + 0.9 / 1.1
Massey Ferguson 5445, 5455, 6455, 6470 - Dana
front axle final drive units
The Dana final drive unit comprises a swivel housing (47) linked to the
front axle housing by two pivot pins (7) (11). The wheel hub (22) turns
on two tapered roller bearings whose cups (23) (19) are force-fitted
into the hub. The cones (18) (25) are also force-fitted. The bearings
(18) (19) (23) (25) are not adjustable. The parts are manufactured with
machining tolerances requiring no further adjustment or shimming. Drive
from the front differential is transmitted to the wheel hub via the
universal joint shaft assembly (10), sun gear (28), planet gears (38)
and ring gear (44). This is held in position by two snap rings (24) (26)
on the ring gear carrier (42). The ring gear carrier is force-fitted to
the housing (47) and locked by the central nut (27).
On AG 85 model (MF 5425, 5435, 5445, 5455, 6445, 6455 tractors), the
planet gear pins (41) are held in rotation in the planet carrier by the
flange (53). On AG 105 Dana front axles (MF 5460, 6460, 6470 tractors),
the planet gears are equipped with a double row of needle rollers
separated by a spacer. For improved performance, the seal rings are
fitted with double lips. Sealing of the hub/housing is ensured by a
cassette seal (45), and sealing of the universal joint shaft/housing is
provided by the seal (8) and the protective ring (40). Sealing of the
drive unit and the swivel housing is ensured by the seal (16) and the
sealing of the swivel bearings in the swivel housing by the seals (6)
and (12).
Dana final drive parts list - (1) Screw (2) Cover plate
(3) Shim(s) (4) Bearing cup (5) Bearing cone (6) Seal (7) Pivot pin (8)
Seal (9) Ring (10) Universal joint shaft (11) Pivot pin (12) Seal (13)
Bearing cone (14) Bearing cup (15) Cover plate (16) Seal (17) Ring (18)
Bearing cone (19) Bearing cup (20) Seal (21) Plug (22) Wheel hub (23)
Bearing cup (24) Snap ring (25) Bearing cone (26) Snap ring (27) Nut
(28) Sun gear (29) Circlip (30) Thrust washer (31) Ring (32) Grease
nipples (33) Screw (35) Needle rollers (36) Planet carrier (37) Friction
plate (38) Planet gear (39) Friction plate (40) Protective ring (41)
Planet gear pin (42) Ring gear carrier (43) Wheel stud (44) Ring gear
(45) Seal (47) Swivel housing (48) Steering stop screw (49) Nut (52)
Axle housing (53) Flange (55) Screw (56) Needle rollers (57) Spacer
Chock the rear wheels. Apply the hand brake. Because the 4WD clutch is
mechanically engaged when stationary, raise the two front wheels in
order to freely turn the hub (22) for the relevant wheel. Remove the
wheel. Drain the drive unit.
Massey Ferguson 5445, 5455, 6455, 6470 -
Removing the planet carrier
Remove the screws (33). Take off and detach the planet carrier fitted
with the thrust washer (30). Remove the circlip (29) and the sun gear
(28). To avoid damaging the thread of the swivel housing (47), it is
advised to correctly unlock the nut (27). Unlock the nut (27) using a
socket. Support the hub (22) in a sling. Remove the hub (22) accompanied
by the ring gear carrier (42) and the ring gear (44) using the puller
and the special sleeve. Smear the cone and the puller screw with
graphite grease. Remove the snap rings (24) (26) from the ring gear
carrier assembly (42). Separate the ring gear (44) from the ring gear
carrier.
MF 5445, 5455, 6455, 6470 - Disassembling the
planet carrier
The planet gear pins (41) are immobilised by a flange (53) attached to
the planet carrier (36) by the screws (55). Place the planet carrier on
a workbench. Take out the screws and remove the flange. Remove the pins
(41) from the planet carrier by screwing a locally obtained screw into
the tapped hole located at the end of each pin. Remove the planet gears
(38). Recover the needle rollers (35) and the plates (37) (39).
Reassembling the planet carrier
Clean and check all components. Replace those that are defective. In
each planet gear (38) Install the needle rollers, smeared with bearing
grease. Install the prepared planet gears in the planet carrier (36).
Massey Ferguson 5445, 5455, 6455, 6470 -
Reinstall the ring gear, the sun gear and the planet carrier
Assemble the ring gear (44) on the ring gear carrier (42) with the snap
rings (24) (26), ensuring their correct positioning in their grooves.
Insert the hub (22), ring gear carrier (42) and ring gear (44) assembly.
Lubricate the splines of the swivel housing (47). Using three or four
(makeshift) flanges "B" screwed into the hub holes, fix together the
ring gear carrier (42) and the hub (22). Install the ring gear carrier /
hub assembly using the fitting tool, until the ring gear carrier comes
into contact with the housing. Tighten tool up against the swivel
housing. Smear nut D and its mating face with graphite grease. Manually
check the rotation of the hub (22).
Install and tighten the nut into the swivel housing groove by bending
its collar without breaking it. Install the sun gear (28) and circlip
(29). Smear the mating face of the planet carrier with sealing product
Loctite 510 or equivalent. Check for the presence of the thrust washer
(30). Reinstall the planet carrier. Tighten the screws (33) to 70-85 Nm.
Turn the hub so that the filler plug is positioned along the horizontal
axis. Fill and top up the Dana final drive unit oil level through the
same port. Screw on the plug (21) fitted with its seal (20). Reinstall
the wheel. Remove the axle stands and the jack. Tighten the nuts to a
torque of 400-450 Nm. Remove the chocks and release the hand brake.
Carry out a road test of the front axle. Check the tightness of the
planet carrier and filler plug mating faces.
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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 |