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Massey Ferguson 3050, 3060, 3080 - Power take-off clutch

MF 3000-3100 Series Tractors Service and Repair

The power-takeoff clutch, fitted at the front of the rear axle housing, is driven by a shaft traversing the primary shaft of the gearbox, the speed shift, the reverse shuttle and the layshaft. This shaft is connected via splines to a sleeve fixed on the engine flywheel. The clutch assembly, Valeo version, is composed of the following principal components: 1) Housing (9) supported by two ball bearings (2) and (7) separated by a sleeve (4) centered in a hole in the center housing.

The housing contains a shaft supported by the ball bearing (23) in the hub (24). 2) Piston (11) sliding inside the housing. 3) Set of inner plates (16) and outer plates (15). 4) Driving hub (24). 5) Cover (20). The housing has exterior helical teeth which drive the gear of the hydraulic pump. The roller bearings and the plates are lubricated. A new clutch made by MF operating in an identical manner is now fitted on 3050, 3060, 3080, 3065, 3070, 3095, 3120 and 3125 tractors. The clutch has 3, 4 or 5 plates, depending on the version.

Version without PTO

On MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 tractors without PTO, an assembly comprising a driving gear and sleeve replaces the PTO clutch. The sleeve is smeared with Loctite 648 and is inserted in the gear by a press. On the right cover, the solenoid valves of the PTO and of the PTO brake are replaced with plugs. The PTO brake feeder tube is absent.

The PTO speed sensor is replaced with a plug. The top link support has 2 plugs mounted on the lubrication and brake ducts of the PTO. A cover plate (fitted using Loctite 510 or equivalent) replaces the rear cover assembly. The lubrication tube of the gear driving the PTO is absent. A right-angled connector replaces the T-connector.

Massey Ferguson 3050, 3060, 3080, 3125 - Power Take-off Clutch Operation

PTO engagement

The clutch is fed by the 17 bar hydraulic circuit through the PTO solenoid valve situated on the right side cover. The oil enters the support housing (9) through channels a, b and c. It pushes the piston (11) which presses the outer plates (15) against the inner plates (16).

The outer plates (15) have lugs which are driven by the clutch housing (17) and the inner plates (16) drive the hub (24), which is splined to the intermediate shaft which is in turn splined to the PTO compound gear. At the same time the pressure which was acting on the PTO brake piston is cut off, enabling the 540 and 1000 rpm gears to turn freely. When the clutch is engaged, the plates

PTO braking

When the supply is cut off the spring pushes the piston against the housing (9). At the same time, the solenoid valve tor the PTO brake directs the oil to the PTO brake situated in the top link support. The pressure acts on a piston winch supports the cup on the rear taper roller bearing, progressively stopping the driving gear.

MF 3050, 3060, 3080, 3125 - 2-Speed Version PTO Clutch Removal and Refitting

Removal

Remove the left side cover. Remove the top link support, the compound gear and the intermediate shaft. Remove the retaining screw of the clutch. Remove the clutch and the spring.

Refitting

Clean and check the parts. Replace those which are defective. Check that the O-rings have not deteriorated. Place the spring in the hollow clutch shaft and refit the clutch, pushing it as far as possible with a lever so as to compress the spring in order to fit the screw. Clean the screw and smear it with Loctite 221 and tighten it with a ring spanner. Refit the intermediate shaft, the compound gear and the top link support. Replace the left cover. Check the operation of the PTO clutch, the PTO brake and of the lift.

MF 3050, 3060, 3080, 3125 - 4-Speed Version PTO Clutch Removal and Refitting

Removal

Remove the left side cover. Remove the top link support, the compound gear and the intermediate shaft. Remove the retaining screw of the clutch. Remove the clutch and the spring.

Refitting

Clean and check the parts. Replace those which are defective. Check that the O-rings have not deteriorated. Place the spring in hollow clutch shaft and refit the clutch, pushing it ns far as possible with a lever so as to compress the spring in order to fit the screw. Clean the screw and smear it with Loctite 221 and tighten it with a ring spanner. Refit the intermediate shaft, the compound gear and the top link support. Replace the left cover. Check the operation of the clutch, the PTO brake and of the hydraulic lift.

Massey Ferguson 3050, 3060, 3080, 3125 - Valeo Clutch Disassembly and reassembly

Valeo Clutch: (1) Circlip, (2) Bail bearing, (3) O-ring, (4) Sleeve, (5) Seal rings, (6) O-ring, (7) Ball bearing, (8) Rivet, (9) Clutch housing, (10) O-ring, (11) Piston, (12) Valve, (13) Belleville washer, (14) Retainer, (15) Outer drive plate, (16) Inner driven plate, (17) Clutch housing, (18) Circlip, (19) Retaining ring, (20) Cover, (21) Spring, (22) Spring seat, (23) Ball bearing, (24) Hub, (25) Screw, (26) Washer, (27) O-ring, (28) Ball

Disassembly

Place the clutch housing (9) in a vice. Remove the retaining ring (19) with vice grips. Remove the cover (20) with the circlip (18) the outer plates (15) and the inner plates (16). Remove the O-rings (3) and (6). Remove the circlip (1). Extract the ball bearings (2) and (7) with the sleeve (4). Remove the sealing rings. Hold the spring (21) with a locally manufactured tool. Remove the screw (25) and the washer (26). Remove the hub (24), the spring seat (22). the spring (21). the retainer (14) and the Belleville washer (13). Extract the ball bearing (23). Take out the piston (11). Remove the O-rings (10) and (27).

Reassembly

The valves (12) are fitted in the piston (11) and the ball (28) in the support housing (9). The support and clutch (17) are fastened together by rivets (8). Clean and check the parts. Replace those which are defective. Using a suitable device and a press, push the ball bearing (7) in as far as the shoulder. Place the seal rings in their grooves. Ensure that they turn freely. Slide the sleeve (4) over the rings, taking care not to damage them.

Position the larger diameter end of the sleeve towards the ball bearing (7). Using a suitable device and a press, push the ball bearing (2) in until it meets the shoulder of the support. Fit the circlip (1). Replace and lubricate the O-rings (10) and (27). Lubricate the hole of the support housing (9) and the piston (11) and insert into the housing with a plastic mallet. Fit the ball bearing (23) in the hub (24).

Refit the Belleville washer (13), the retainer (14), the spring (21). the spring seat (22) and the hub (24). Compress the spring (21) with the tool. Fit the washer (26) and tighten the screw (25) smeared with Loctite 242 to a torque of 24-28 Nm. Take care not to obstruct the lubricating hole with Loctite. Place the outer plates and the inner plates on the hub (24).

The clutch is equipped with 5 inner plates and 6 outer plates. Check that the plates slide freely on the hub. Fit the cover (20) with the circlip (18). Fit the retaining ring (19). The retaining ring must be fitted between the cover and the circlip (18). After fitting, bend back the end of the retaining ring. Manually check that the inner plates and outer plates do not bind together. Lubricate and fit the O-rings (3) and (6). The О-rings have different diameters.

Massey Ferguson 3050, 3060, 3080, 3125 - MF Clutch Disassembly and Reassembly

MF Clutch: (1) Circlip, (2) Ball bearing, (3) O-ring, (4) Sleeve, (5) Seal rings, (6) O-ring, (7) Ball bearing, (8) Valve, (9) Support housing, (10) Piston, (11) O-ring, (12) Belleville washer, (13) Retainer, (14) Outer plate (A - 3-plate clutch, В - 4-plate clutch, C - 5-plate clutch), (15) Clutch housing, (16) Bolt, (17) Inner plate (A - 3-plate clutch, В - 4-plate clutch, C - 5-plate clutch), (18) Spring, (19) Spring seat, (20) Securing ring, (21) Hub, (22) Ball bearing, (23) Washer, (24) Screw, (25) O-ring, (26) O-ring, (27) Sleeve, (28) Spacer (3- and 4-plate type), (29) Spacer (3-plate type), (30) Pins

Disassembly

Remove the bolts (16). Remove the clutch housing (15). the inner plates (17) and the outer plates (14). The number of inner plates and outer plates varies according to the type of tractor. Assembly A: 3 inner plates, 3 outer plates and 2 spacers (28) and (29) for MF 3050, 3060, 3065 tractors. Assembly B: 4 inner plates, 4 outer plates and 1 spacer (28) for MF 3070, 3080, 3095. Assembly C: 5 inner plates, 5 outer plates for MF 3115, 3125, 3120, 3140 tractors. Place the support housing (9) in a vice.

Remove the O-rings (3) and (6). Remove the circlip (1). Extract the ball bearing (2) with the sleeve (4). Remove the seal rings. Extract the ball bearing (7). Hold the spring (18) with the aid of a locally made tool. Remove the screws (24) and take off the washer (23). Gradually decompress the spring with the tool. Remove the hub (21), the spring seat (19). the spring (18) the retainer (13) and the Belleville washer (12). Remove the securing ring (20). Extract the ball bearing (22). Take out the piston (10). Remove the O-rings (11). (25) and (26).

Reassembly

The valve (8) is fitted in the support housing (9). The sleeve (27), smeared with Loctite 648 is fitted with a press if disassembly proves necessary, check when reassembling that the channel is not obstructed with Loctite. Two pins (30) are fitted in the support housing (9) 5 mm from the face. Clean and check the parts. Replace those which are defective. Using a suitable device and a press, push the ball bearing (7) in until it meets the shoulder.

Place the seal rings (5) in their grooves and join up the ends. Ensure that they turn freely. Slide the sleeve on to the seal rings, taking care not to damage them. Position the larger diameter end of the sleeve towards the ball bearing (7). Using a suitable device and a press, push the ball bearing (2) in until it meets the shoulder of the support housing (9). Fit the circlip (1). Replace and lubricate the O-rings (11), (25) and (26).

Lubricate the sleeve (27) and the piston (10) and insert into the housing with a plastic mallet. Using’s suitable device and a press, insert the ball bearing (22) into the hub (21). Fit the securing ring (20). Refit the Belleville washer (12), the support (13). the spring (18), the spring seat (19) and the hub (21). Compress the spring (18) with the tool. Mount the washer (23) and tighten the screw (24) smeared with Loctite 242 to a torque of 24-28 Nm.

Place the spacers, the outer plates and the inner plates (according to the type) on the hub (21). Position the clutch housing (15) on the two pins (30). Fit the bolts (16) lightly smeared with Loctite 542 and tighten them to a torque of 24-28 Nm. Manually check that the inner plates and outer plates do not bind together. Lubricate and fit the O-rings (3) and (6). The О-rings have different diameters.

MF TRACTORS TROUBLESHOOTING
1652	1749	2620	2725	2805
3050	3120	3640	3709	4245
4455	5320	5455	5613	6150
6280	6480	6615	7618	7720