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Massey Ferguson 5445, 5455, 5465 - Rear axle trumpet housings
The trumpet housings support the right and left-hand axle shafts and
contain the final drive units that transmit the rotation from the
differential assembly. Both trumpet housings are symmetrical and fitted
on either side of the centre housing.
MF 5435, 5445, 5455, 5460, 5465, 5470, 5475 -
Trumpet housings construction
The axle shaft (2) is supported by two opposing tapered roller bearings
(5) (8). External sealing is ensured by a three-lipped seal (3) and
internal sealing is provided by a single lip seal (7). The three-gear
final drive unit (14) planet carrier assembly (10) is integral in
rotation with the shaft (2) via splines. The Normal Duty trumpet housing
planet gears have a single row of needle rollers (15). The internal
faces of the planet carrier (10) are rough cast and therefore require
adjustment using friction shims (13).
Shims (25) placed at the end of the shaft are used to preload the
tapered roller bearings. The shaft (2) and the planet carrier (10) are
held in place by the washer (24) and the screw (23). The final drive
ring gear (21) is force fitted into the trumpet housing and held in
place by the three screws (16). It has three pins (20) ensuring centring
of the brake plate (17). Differential rotation is transmitted to the
planet gears of the final drive via a sun gear shaft (22) on the teeth
of which the brake disc (18) is fitted. The brake discs are lubricated
by a continuous flow of oil from the linkage valve.
Parts list - (1) Wheel stud (2) Axle shaft (3)
Three-lipped seal (4) Seal cage (5) Bearing cup (5A) Bearing cone (6)
Trumpet housing (7) Seal (8) Bearing cup (8A) Bearing cone (9) Tab
washer (10) Planet carrier (11) Snap ring (12) Planet gear pin (13)
Friction shim(s) (14) Planet gears (15) Needle rollers (16) Screw (17)
Brake plate (18) Brake disc (19) Screw (20) Pin (21) Final drive ring
gear (22) Sun gear (23) Screw (24) Washer (25) Shim(s) (26) Pin (27)
Plug
Massey Ferguson 5435, 5445, 5455, 5460, 5465,
5470, 5475 - Trumpet housing assembly
Removal
Immobilise the tractor. Apply the hand brake. Chock between the frame
and the front axle. Drain the rear axle. Using a trolley jack, raise the
relevant side of the tractor. Place an axle stand in position. Remove
the wheel. Remove the stabilising support. Disconnect the hose (1) or
(3) and the brake lubrication pipe(s). Remove cab screws A.
Raise the cab sufficiently to allow the trumpet housing to be removed
(chock the cab). Check the gap between the bonnet and the windscreen
(remove the body if necessary). If replacing the trumpet housing, remove
the supports C by removing the screws B. Underneath the trumpet housing,
position a suitable support on a trolley jack. For the left-hand trumpet
housing, disconnect the supply hose from the linkage valve (plug the
channels). Loosen the screws (19).
With the help of an operator and in compliance with the safety
regulations, separate the trumpet housing from the rear axle housing.
Remove: brake disc (18), sun gear (22), centring pin (26). Remove the
brake plate (17).
Reinstall
Clean the mating faces on the housing and on the trumpet housing with a
non-greasy solvent. Apply a bead of silicon resistant to hydrocarbons
(Silicomet type) to the inside edge of the housing. Check that the disc
(18) slides freely on the sun gear (22).
Reinstall the centring pin (26), the sun gear (22) and the brake disc
(18). Screw two diametrically opposed guide studs onto the housing.
Reinstall the brake plate (17) in the trumpet housing. In order to hold
the plate in place, apply three spots of miscible grease to the face of
the ring gear (21). Couple the trumpet housing to the rear axle,
following the safety procedures used during its removal. Turn the shaft
(2) to engage the sun gear (22) in the planet gears.
Clean the screws (19) and smear them with Plastex, Hylomar or an
equivalent sealing paste. Install and tighten the screws (19) to a
torque of 170-210 Nm. Install the cab screws. Reinstall the other
removed parts. Top up the oil level in the rear axle. Install the wheel.
Tighten to a torque of 400-450 Nm. Remove the axle stand. Test the
linkage and the brake system. Check tightness: between the trumpet
housing and the rear axle housing, of the linkage valve supply hose, of
the brake lubrication pipes.
MF 5435, 5445, 5455, 5460, 5465, 5470, 5475 -
Rear axle planet carrier
Disassembly
Remove the trumpet housing. Remove the screw (23). Take off the
retaining washer (24) and the shim(s) (25). Remove the planet carrier
(10).
Open the snap ring (11). Using a hammer, tap gently on the three pins
(12). Take out the three pins (12) and the snap ring (11). Remove the
three planet gears (14), the needle rollers (15) and the shims (13).
Reassembly
Clean the planet carrier (10), the pins (12) and the planet gears (14).
Check the parts. Smear the needle rollers with miscible grease. Install
a row of needle rollers in each planet gear. Shim the planet gears. The
shims (13) are available in three different thicknesses. Install the
planet gears (14) with the shims (13) of medium thickness on either side
of the planet gear. Engage the three pins (12).
Use a set of shims to determine a thickness of shims (13) to fit to
obtain an axial clearance of between 0.15 and 0.55 mm on each planet
gear. Pull gently on the three pins, and Install the shims (13). Push
back the three pins and the snap ring (11). Open the snap ring (11). Tap
gently on the three pins so that the snap ring Install into the groove
of the planet carrier. Ensure that the tab washer (9) is present.
Reinstall the planet carrier. Install shims to obtain the required
preload. Reinstall the trumpet housing.
Bearings and seals
Disassembly
Remove the trumpet housing from the rear axle housing. Remove the planet
carrier. Remove: tab washer (9); cone (8A) (free fitted on the shaft).
Take the shaft (2) out of the trumpet housing. Extract the cone (5A).
Drive out the lip seal (3). Using a puller, take out: cup (5); cage (4)
of the seal (3); cup (8). Drive out the seal (7).
Reassembly
The ring gear (21) is force fitted in the trumpet housing (6). It is
centred by the three pins (20) (Loctite 638) and secured by the screws
(16). Tightening torque 79-90 Nm (Loctite 242). Clean the seal mating
faces and the location of cups and cones inside the trumpet housing and
on the shaft. The seal, cup and cone mating faces should be free of
burrs and dents. Smear the external surface of the seal (7) with Loctite
542 (metal cage). Replacing the seal (7): Without replacement of the
shaft 2): So that the seal lip does not rest in the same place on the
shaft, fit the seal 4 mm from the shoulder of the cup (8).
With replacement of the shaft (2): Position the seal 5 mm from the
shoulder of the cup (8).
Lubricate the cups (8) (5) and Install them home against the shoulder.
Install the cage (4) home against the shoulder. Install the three-lipped
seal (3) home against the shoulder of the shaft. Lubricate the shaft (2)
and Install the cone (5A) against the shoulder. Moderately grease the
cone (5A) and the lips of seals (3) (7) (using BP Agricharge grease or
equivalent). Protect the splines of the shaft (2) and insert it into the
trumpet housing. The lips of the seal (3) must be facing outwards.
Remove the shaft protection and lightly lubricate the cone (8A).
Reinstall the cone (8A), washer (9) and planet carrier (10). Install
shims to obtain the required preload. Replace the plug (27) with a
grease nipple. Partially fill the trumpet housing cavity between the
cone (5A) and the seal (3) with BP Agricharge grease or equivalent. Take
off the grease nipple and retighten the plug.
Massey Ferguson 5435, 5445, 5455, 5460, 5465,
5470, 5475 Rear axle - Preloading the axle shaft bearings
Place the trumpet housing assembly in vertical position. Remove the
screw (23) and the washer (24). Seat the cones (5A) (8A) in their cups
by turning the trumpet housing on its shaft.
Determine a thickness of shims (25) greater than dimension X in order to
obtain a clearance. Install the washer (24) and the screw (23) and
tighten to a torque of 270-440 Nm. Using a dial gauge, check the
clearance by moving the planet carrier axially. Remove the screw (23)
and the washer (24). Depending on the dial gauge reading, remove the
surplus shim thickness (25) in order to obtain a preload of: P1 = 0.025
to 0.125 mm Clean the tapping at the end of the shaft (2). Reinstall the
washer (24). Clean the screw (23) and smear it with Loctite 241. Tighten
to a torque of 270-440 Nm.
Replacing the wheel stud
Drive out the defective stud using a bronze drift and a hammer. Use a
brush and some solvent to clean the serration marks left by the stud on
the shaft flange. Dry off with compressed air. Apply a few drops of
Loctite 270 to the new stud serration. Install the new stud over the
serration marks left by the previous stud. After checking that the
splines are properly engaged, bring the stud head up against the inner
flange of the axle shaft with a bronze drift.
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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 |