________________________________________________________________________________
Massey Ferguson 5445, 5455, 5465 - Front Axle 4WD Clutch
The front axle clutch assembly is fitted in the lower part of the rear
axle housing. An inspection cover located under the housing provides
access to the mechanism, which comprises. Shaft (25) turning on two
tapered roller bearings fitted in the bore of the axle housing.
Hydraulic clutch assembly attached to the rotating shaft. Bell gear (15)
centred on the shaft by a ring (43), driving the clutch discs (36). The
helical bell gear (15) is constantly meshed to the gear (7) on the
pinion. The shaft is shimmed to obtain an operating clearance between 0
and 0.10 mm using shims (20) positioned between the cap (22) and the cup
(18).
MF 5445, 5455, 5465 - Front Axle Clutch
Operation
Declutching
The 4WD solenoid valve sends the 17 bar pressure into the shaft (25) via
a channel drilled in the axle housing and the ring (11). The cover plate
(30) moves on the hub (40) and pulls the bell (42) which compresses the
Belleville washers (34) and (35), releasing the discs (36). The bell
gear (15) attached to the ring (43) turns idle on the shaft.
Clutch
The pressure drop releases the Belleville washers, which push the bell
(42) so that it becomes attached to the bell gear (15), which in turn
drives the shaft (25). The oil then returns to the housing via the
solenoid valve.
Parts list: 1 - Sleeve, 2 - Double pin, 3 - Shaft, 4 -
Double pin, 5 - Sleeve, 6 - Circlip, 7 - Gear, 8 - Plug, 9 - Needle
roller bearing, 10 - Screw, 11 - Ring, 12 - Seal rings, 13 - Cup, 14 -
Cone, 15 - Bell gear, 16 - Clutch assembly, 17 - Cover plate, 18 - Cup,
19 - Cone, 20 - Shims, 21 - "O" ring, 22 - Cap, 23 - Circlip, 24 - Seal,
25 - 4WD drive shaft, 26 - Seal, 27 - Stop screw, 28 - Flange, 29 - "O"
ring, 30 - Cover plate, 31 - Circlip, 32 - "O" ring, 33 - "O" ring, 34 -
Belleville washer, 35 - Belleville washer, 36 - Disc (A. 4-disc clutch,
B. 5-disc clutch), 37 - Thrust plate (A. 4-disc clutch, B. 5-disc
clutch), 38 - Cover plate, 39 - Circlip, 40 - Hub, 41 - Shims, 42 -
Bell, 43 - Ring
Massey Ferguson 5445, 5455, 5465 - Removing
the clutch assembly
Chock the tractor. Drain the rear axle housing. Disconnect the two front
differential lock control hoses (plug the channels). Remove the guard
and the transmission shaft. Remove the engine clutch or Power Shuttle
lubrication pipe that is fitted to the lower cover plates of the centre
housing and the gearbox. Remove the screws (10) and the cover plate
(17). On tractors fitted with proportional PTO, recover the spring (3),
the detent plunger (2) and the retainer pipe (1). On tractors fitted
with a reinforced sealed guard, remove the screw (27), flange (28) and
seal (26). Remove the circlip (23). Protect the splined part of the
shaft (25).
Extract the cap (22) with its seal (24) using the makeshift tool. Remove
the seal (24). Remove the "O" ring (21). Remove the shims (20) and the
cup (18). On tractors fitted with proportional PTO, place the control in
declutched position. Extract the shaft assembly (25) and bearing cone
(19), while holding the clutch assembly (16) and the bell gear (15).
Remove the clutch assembly (16) with the bell gear (15) and the cone
(14). Using a makeshift tool, extract the ring (11). This tool is
essential for tractors with proportional PTO. If necessary, also remove
the cup (13) using a suitable extractor. When removing the gear (7), it
is necessary to remove the right-hand hydraulic cover plate.
MF 5445, 5455, 5465 Tractors with no creeper unit - Drive out the double
pins (2) (4) from the coupling sleeves (1) (5). Slide the sleeves
towards each other on the shaft (3) and remove the shaft - sleeve
assembly. Take off the circlip (6) and remove the gear (7).
MF 5445, 5455, 5465 Tractors with a creeper unit - Take off the circlip (6)
and remove the gear (7).
MF 5445, 5455, 5465 - Disassembling the clutch
Detach the bell gear (15) from the clutch assembly (16). Remove the
circlip (31). Remove the cover plate (30). Remove the "O" rings (29)
(32). Using a press and a suitable fixture, compress the Belleville
washers (34) (35). Take off the circlip (39) and the shim(s) (41).
Remove the suitable fixture. Remove the cover plate (38), the discs (36)
and the thrust plates (37). Separate the hub (40) from the bell (42).
Remove the "O" ring (33). Remove the Belleville washers (34) (35).
Disassembling the shaft
Remove the two rings (12). Extract the cone (19) using a press and a
suitable fixture. Extract the needle roller bearing (9). Remove the plug
(8).
Reassembling the shaft
Check that the shaft channel is not blocked. Tighten the plug (8)
smeared with Loctite 542 to a torque of 10 Nm. Install the needle roller
bearing (9) 2.5 mm set back from face F. Install the bearing cone (19)
against the shoulder of the shaft (25).
MF 5445, 5455, 5465 - Reassembling the clutch
Check and clean the components and replace those that are defective.
Check that the 17 bar channel in the hub (40) is not blocked. Position
the Belleville washers (35) (34) in the bell (42). Two types of
Belleville washers with different markings and different loading efforts
can be fitted: 3619147M1 marked 147 / 3619473M1 marked 473. The clutch
assembly is normal or reinforced depending on the tractor types.
Lubricate and fit the "O" ring (33) on the hub (40). Place the hub (40)
in the bell (42), braced against the Belleville washers. Install the
discs (36), aligning the lugs and the thrust plates (37), and fit the
cover plate (38).
Adjusting clearance
Using a press and suitable fixture apply a load of 2000 daN to fully
compress the Belleville washers (35) (34). Install the circlip (39). Use
a set of shims to increase the distance X between the cover plate (38)
and the circlip (39). Select the shim(s) (41) to obtain a clearance J1 =
0.9 to 1.1 mm. Remove the circlip (39). Position the shim(s) chosen
between the cover plate and the circlip (splined shim on the circlip
side). Reinstall the circlip. Lubricate and fit the "O" rings (32) (29)
on the cover plate (30) and refit the cover plate. Install the circlip
(31). Install the clutch assembly (16) on the bell gear (15). The ring
(43) is force fitted in the bell gear (15) and then rebored.
Massey Ferguson 5445, 5455, 5465 - Install the clutch assembly
Tractors with no creeper unit - Reinstall the gear (7) (if removed).
Position the circlip (6). Reinstall the connecting shaft and coupling
sleeves. Replace the double pins.
Tractors with a creeper unit - Reinstall the gear (7) (if removed).
Position the circlip (6). Reinstall the right-hand hydraulic cover
plate. Install the cup (13) (if removed). Install the ring (11) using a
makeshift drift, so that the ring is positioned 4 to 5 mm set back from
the cup mating face (13). Move the ring until one of its holes opens
into the clutch supply channel in the housing.
Install the seal (24) in the cap (22). In order to correctly "seat" the
cones in their bearing cups, to obtain the clearance: J2 = 0 to 0.10 mm,
fit the cone (14), the shaft (25), and the cup (18). Protect the splines
of the shaft. Install the bearing (22) and the circlip (23). Place the
dial gauge feeler pin against the end of the shaft (25). Pull the shaft,
while turning it alternately from right to left to correctly seat the
cones in the cups. Set the dial gauge to zero. Depending on the
clearance measured, select the thickness of the shim(s) (20) required to
obtain J2. Remove the circlip (23), cap (22), cup (18) and the shaft
(25). Install the seal rings (12) in the grooves of the shaft (25) and
hook their ends. Ensure that they turn freely.
Install the cone (14) into the cup (13). Insert the shaft (25) after
having positioned the clutch assembly (16) and bell gear (15) in the
housing. Install the cup (18) and the shim(s) (20) (smeared with
grease). Install the "O" ring (21) in the housing groove. Install the
cap (22) and the circlip (23), and remove the spline protection on the
shaft. On tractors with reinforced sealing, grease and position the seal
(26), with the lip turned towards the cap (22). Remove the safety
shield. Install the flange (28), ensuring that operational clearance
remains between the flange and housing. Tighten the screw (27) after
smearing it with Loctite 241. Clean and degrease the mating face of the
cover plate (17) and the housing. Smear the mating face of the cover
plate with a sealing product (Loctite 510 or equivalent). Screw two
opposing guide studs into the housing.
On tractors fitted with proportional PTO, check the position of the
lever (4). Fit the retainer pipe (1), the detent plunger (2) and the
spring (3). Put the cover plate back on (17). Remove the guide studs,
and fit and tighten the screws (10) to a torque of 130-170 Nm. Smear the
two sleeves of the 4WD transmission shaft with "Anti Seize" grease or
equivalent. Refit the transmission shaft and guard, and reconnect the
two front differential lock hoses. Refit the lubrication pipe for the
Power Shuttle or engine clutch. Top up the rear axle oil level and
remove the shims. Check clutch operation and proportional PTO control
adjustment (if fitted). Check tightness of: the mating faces of the
cover plate under the rear axle housing, the right-hand hydraulic cover
plate (if removed), hydraulic unions.
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS SPECIFICATIONS |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF FRONT END LOADERS |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS MAINTENANCE |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS TROUBLESHOOTING | ||||
1652 | 1749 | 2620 | 2725 | 2805 |
3050 | 3120 | 3640 | 3709 | 4245 |
4455 | 5320 | 5455 | 5613 | 6150 |
6280 | 6480 | 6615 | 7618 | 7720 |