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Massey Ferguson 3050, 3080, 3125 - Removable PTO shaft

MF 3000-3100 Series Tractors Service and Repair

The driven gears (5) and (6) are fitted on the PTO shaft situated in the lower rear part of the axle housing. These gears constantly engage with the driving compound gear which is driven by the upper shaft whose movement is transmitted by the PTO clutch. The PTO shaft (10) is fitted at the front on a roller bearing force-fitted in the axle housing and at the rear on a hub (9) turning on a roller bearing (15). It has 6 splines in the 540 rpm version and 21 splines in the 1000 rpm version.

In the 540 rpm configuration, the gear (5) is driven through the splines of shaft (10). The gear (6) and bush (4) assembly runs idle on the shaft (10). In the 1000 rpm configuration, the gear (6) is driven via the splines of shaft (10). The gear (5) and shaft (3) assembly runs idle on the shaft (10). The snap ring (20) holds the shaft in place. Sealing is provided by the seal (14) or (14A) and the O-rings (11) and (19). The deflector (13) ensures protection against foreign material.

Parts list: (1) Roller bearing, (2) Deflector, (3) Bush, (4) Bush, (5) 540 rpm gear, (6) 1000 rpm gear, (7) Circlip, (8) Snap ring, (9) Hub, (10) 540 or 1000 rpm PTO shaft, (11) O-ring, (12) Cover, (13) Deflector, (14) Sealing ring, (14A) Reinforced sealing ring, (15) Roller bearing, (16) Bolt, (17) PTO speed sensor, (18) Nut, (19) O-ring, (20) Snap ring

MF 3050, 3060, 3080, 3125 PTO - Replacement of 540 or 1000 rpm shaft

Disassembly

Raise rear of tractor to avoid oil spillage. Remove snap ring (20). Withdraw shaft (10). Remove O-ring (11) and discard it.

Reassembly

Fit a new O-ring (11). Clean and refit shaft (10). Refit snap ring (20) and lower rear of tractor.

Massey Ferguson 3050, 3060, 3080, 3125 PTO - Removal and refitting of rear cover

Removal

Partially drain the rear axle housing. Remove two diametrally opposed bolts (16). Screw two guide studs against the gear (6). The purpose of this is to hold the gears (5) and (6) in line when removing the shaft (10) and the rear cover assembly. Remove the other two bolts (16). Withdraw the shaft and bearing assembly.

Refitting

Mount the shaft and rear bearing assembly. Smear Loctite 542 on two bolts (16) then tighten to a torque of 105-120 Nm. Remove the two guide studs. Smear Loctite 542 on the other two bolts (16) then tighten to a torque of 105-120 Nm. Top up the oil level of the rear axle housing.

Massey Ferguson 3050, 3060, 3080, 3125 PTO - Disassembly and reassembly of rear cover

Disassembly

Remove O-ring (19). Remove snap ring (20). Separate the shaft (10) from the bearing assembly. Remove O-ring (11). Remove circlip (7). Separate the cover (12) from the roller bearing (15). Remove snap ring (8). Extract the roller bearing (15) from the hub (9).

Reassembly

Using a press and a suitable device, fit the deflector (13) against the shoulder of the cover (12). Assemble in the correct way. Using a press and a suitable device, fit the sealing seal ring flush with the chamfer of the cover (12) with the lip facing towards the bearing (15).

MF 3050, 3060, 3080, 3125 PTO - Disassembly and reassembly of 540 or 1000 rpm gear and of front bearing

Disassembly

To disassemble gears (5) and (6) it is necessary to remove: The top link support, the driving gear and the intermediate shaft. In order to gain access to the sensor, remove the left cylinder by dismantling the lower fastening and disconnecting the supply hose. Remove the PTO sensor (Autotronic/Datatronic). Remove the rear cover assembly. Remove the gears (5) and (6). Extract the bearing (1) and the deflector (2),

Reassembly

Clean and check the parts. Replace those which are defective. Smear Loctite 648 on the face of the deflector (2) which meets the housing and place it in its hole. Position so that the aperture faces upward. Fit the roller bearing (1) in the housing abutting on the deflector (2). Lubricate the bushes (3) and (4). Refit the gears (5) and (6) and screw two guide studs against the gear (6).

The purpose of this is to hold the gears in line when refitting the rear cover assembly. If the bushes (3) and (4) are damaged, replace the gears (5) and (6). Refit the rear cover assembly. Smear Loctite «Form A gasket 2» (sensor sealing or equivalent) on the thread of the PTO sensor. Fit and adjust the sensor: Screw the sensor fully in, without forcing it, so that it is in contact with the gear (6).

Unscrew the sensor 3/4 of a turn. Tighten the nut (18) moderately and connect the harness. Refit the LH cylinder, reassemble the lower fastening and reconnect the supply hose. Refit the driving gear with the intermediate shaft and the top link support. Refit the lift cover. Top up the oil level of the rear axle housing. Check the operation of the PTO and its brake.

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