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Massey Ferguson 3050, 3060, 3080, 3125 Rear Axle - Lift cover

MF 3000-3100 Series Tractors Service and Repair

The lift cover is mounted on the upper face of the rear axle housing. The shaft (4) which has the two lift arms (5) and (11) splined to it is supported by bushes (8). Cam (9) on the lift shaft (4) provides the means for sensor (26) to monitor position of lift arms. This information is transmitted to the Electronic Linkage Control (ELC) system. To ensure correct play between the lift arms and the cover, shims are fitted on the left hand end of the shaft. The rear face of the lift cover supports the auxiliary spool valves. The vehicle speed sensor (15) is screwed in the front oi the cover. The cover also supports lever (21) for economy (4 speed) PTO.

Parts list - (1) Washer, (2) Bolt, (3) Retainer, (4) Lift shaft, (5) Right-hand lift arm, (6) Nylon ring, (7) O-ring, (8) Bush, (9) Cam, (10) Lift cover, (11) Left-hand lilt arm, (12) Shim(s), (13) Bush, (14) Set screw, (15) Vehicle speed sensor, (16) Nut, (17) Cup plug (2-speed PTO), (18) Screw (4-speed PTO), (19) Control finger (4-speed PTO), (20) О-ring (4-speed PTO), (21) Lever (4-speed PTO), (22) Screw (4-speed PTO), (23) Elbow connector, (24) Bolt, (25) Nut, (26) Position sensor, (27) Cup plug, (28) Threaded plug, (29) Seal, (30) Threaded plug, (31) Seal

Massey Ferguson 3050, 3060, 3080, 3125 - Lift Cover Removal and Disassembly

Removal

Remove the sheet metal. Remove the rear fastening screws to the cab (remove only the central and lower screws to the guard plates to gain access to the cab fastening screws). Raise the cab. Place a block between the cab and the trumpets. Disconnect: the supply hose to the spool valve; supply hose to the lift valve; return hose. Remove the bolts for the spool valve support. Remove the support swinging the assembly out of the way, without disconnecting the controls.

Disconnect: vehicle sensor wire assembly (Autotronic, Datatronic); position sensor wire assembly; differential lock pipe; cable (4-speed PTO, if fitted); cable(shiftable PTO, if fitted). Unscrew the pipe at both ends and remove the support for the trailer brake connector if fitted. Remove the upper pins from the rams and lift rods. Remove the fastening bolts for the cover. The PTO control cable supports (depending on the version) are fixed by the bolts for the cover. Lift there over and remove it.

Disassembly

Place the cover on a work bench. Remove the elbow connector. Unscrew the nut (16) and remove the vehicle speed, sensor (15). Unscrew the nut (25) and remove the position sensor (26). For MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 tractors equipped with economy 4-speed, carry out operations. Undo the Allen screw (22) in the lever (21). Undo the screw (18).

Remove the control finger (19). Remove the O-ring (20). Flatten tabs locking the bolts (2) retaining the lift arms. Undo the screws. Remove the washers (1). Remove the shim(s). Remove the lift arms (5) and (11). Remove the nylon rings (6) and the O-rings (7). Remove the set screws (14) in the cam (9). Withdraw the lift shaft (4) from the cover. Remove the cam (9). Withdraw the bushes (8). Remove the cup plug (17) (2-speed PTO).

Massey Ferguson 3050, 3060, 3080, 3125 - Lift Cover Reassembly

The bushes (13) are mounted with Loctite 648 at a distance of 40.50 mm from the face. Clean and check the parts. Replace any which are defective. Clean the joint faces of the lift cover and of the spool valve support. Fit the bushes in the cover. Fit the cup plug (17) smeared with Loctite 542 flush with the cover (2-speed PTO). Mount the lift shaft (4) and the cam (9) in the cover. Ensure that the direction of the shaft and the position of the cam are correct. Tighten the set screws (14) smeared with Loctite 241 to a torque of 5 Nm.

Apply this torque so as not to deform the cam. Position the O-rings (7) and the nylon rings (6). Note: Protect the splines of the shaft. Lubricate the О-rings before mounting. Grease the splines of the shaft (4) (Anti-Seize Grease or equivalent). Fit the lift arm (5) (sensor side), the washer (1). the retainer (3) and the screw (2). Grease the face of the cover (Anti-Seize Grease or equivalent) before fitting the arms. Tighten the screw (2) so as to align two flat sides of the screw head with the two tabs of the retainer(3). Bend back the tabs.

Carry out shimming of the shaft (4) to obtain: J1 = +0.05 to +0.20 maximum. Mount the arm (11), the washer (1) and the bolt (2). Grease the face of the cover (Anti-Seize Grease or equivalent) before mounting the arm. Tighten the bolt so as to position the lift arms (5) and (11) correctly on the shaft. Remove the bolt (2) and the washer (1) at the left end of the shaft. Measure the distance between face A of the shaft and face В of the arm using a depth gauge. By measuring dimension X, determine the thickness of spacers Y needed to obtain: J1 = +0.05 to +0.20 maximum. J1 = X + Y.

Mount the previously selected shims, the washer (1), the retainer (3) and the bolt (2). Tighten the bolt (2) so as to align two flat sides of the screw head with the two tabs of the retainer (3). Bend back the tabs. For MF 3050, 3060, 3080, 3065, 3070, 3095, 3120 tractors equipped with economy 4-speed PTO, carry out operations. Refit the finger (19). Mount the O-ring (20) from the exterior side of the cover. Smear the screws (18) and (22) with Loctite 241 and tighten. Check that the control functions smoothly. Fit the elbow connector (23).

Massey Ferguson 3050, 3060, 3080, 3125 - Lift Cover Refitting

Clean the joint face of the cover on the rear axle housing. Smear the joint face with a sealing compound (Master Joint 510 Loctite or equivalent). Lift cover into position. When refitting the cover, ensure that the supply pipe of the differential lock and the control finger (4-speed economy PTO) engage properly in their respective positions.
Mount the supports for the PTO control cables (depending on the version) and fit the bolts (24) of the cover (10).

Tighten to the following torque: 12 mm diameter bolt = 72-96 Nm, 16 mm diameter bolt = 160-200 Nm. A heavy-duty cover and five new bolts (24) has been released on MF 3125 tractor. The tightening torque of 16 mm diameter bolts is 240-320 Nm instead of 160-200 Nm. Refit the upper pins to the rams and lift rods.

Refit the trailer brake valve support if fitted. Retighten the pipe at both ends. Refit: differential lock supply pipe (3); cable (4) (4-speed PTO, if fitted); cable (5) (shiftable PTO, if fitted). Fit the vehicle speed sensor (15) with Loctite 577 Sensor Sealing or equivalent (Autotronic, Datatronic tractors). Screw in the speed sensor into contact with the crown wheel, without forcing it.

Unscrew the sensor 3/4 of a turn so as to obtain a clearance of approx. 1 mm between the sensor and the crown wheel. Tighten the nut (16) moderately. Connect the sensor. Fix the harness assembly with a clip. Clean the joint face of the spool valve support. Coat the joint face of the spool valve support with a sealing compound (Master Joint 510 Loctite or equivalent). Refit the support and spool valve assembly.

Smear the thread of the two lower screws (4) with Loctite 510. Fit and tighten the bolts (4) in the spool valve support to a torque of 50-70 Nm. Reconnect: supply hose (1) to the spool valve; supply hose (3) to the lift valve; return hose (2). Adjust the PTO control (4-speed) and the PTO control (shiftable). Remove the blocks between the cab supports and the trumpets. Position the cab. Refit the rear fastening screws of the cab.

Tighten the nuts to 27-35 Nm and the lock-nuts smeared with Loctite 270 to 13-20 Nm. Refasten the guard plates. Fit and adjust the position sensor. Smear the thread of the sensor (26) with a sealing compound (Hylomar or equivalent), then screw in the sensor a few turns and connect the harness. Start the engine. Using the external control, make sure that the lift arms are in the fully raised position (relief valve blowing).

Stop the engine, then make a mark on the cover and on one arm. Screw in the sensor (without forcing it) until it meets the cam (9) and unscrew by approximately one turn (1.5 mm). Fix the harness. Start the engine. Using the internal control, lower and raise the lift arms. Check the position of the moving mark on the arm. The difference between the two marks should be approx. 3 mm. If the difference is greater than 3 mm, unscrew the sensor slightly. If the difference is less than 3 mm, retighten the sensor slightly.

Tighten the nut (25) to a torque of 25 Nm using a suitable spanner. Check for leaks: at the joint between the lift cover and the spool valve support, at the hydraulic connectors. Refit the sheet metal. Version without lift - The holes of the shaft (4) are plugged with caps (27) sealed with Loctite 542. The position sensor (26) is replaced with a threaded plug (28) equipped with a seal (29). Version without Autotronic - The vehicle speed sensor (15) is replaced with a threaded plug (30) equipped with a seal (31).

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