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Massey Ferguson 3050, 3060, 3080, 3125 - Handbrake

MF 3000-3100 Series Tractors Service and Repair

The hand brake assembly is fitted on the bevel drive pinion. It consists of a mechanism placed between two friction discs which are driven by the bevel drive pinion via splines. The mechanism comprises two cast iron plates held by springs and separated by balls housed in cams.

Massey Ferguson 3050, 3060, 3080, 3125 - Handbrake Operation

When the handbrake lever in the cab is pulled, the cam (14) is moved via the pin (20). The cam pushes the actuator lever (13) which causes the plates of the mechanism (31) to rotate and move apart. The discs (30) are thus compressed between the moving plates, the closing plate (24) and the supporting plate (29) preventing the bevel drive pinion from rotating. When the hand brake lever is released, the spring (17) moves the cam (14) to the rest position and the mechanism is closed by its springs.

Parts list - (1) Circlip, (2) Pinion, (3) Stud, (4) Nut, (5) Plate, (6) Pin, (7) Clevis, (8) Pin, (9) Cotter pin, (10) Left cover, (11) Plug, (12) Seal Ring, (13) Actuator lever, (14) Cam, (15) Circlip, (16) Finger, (17) Spring, (18) Dowel, (19) Seal ring, (20) Control shaft, (21) Retainer ring, (22) Washer, (23) Finger, (24) Closing plate, (25) Screw, (26) Bevel drive pinion, (27) Shim(s), (28) Screw, (29) Supporting plate, (30) Discs, (31) Mechanism

Massey Ferguson 3050, 3060, 3080, 3125 - Handbrake Disassembly

Drain the rear axle housing. Block the front wheels of the tractor between the engine frame and the front axle. Raise the tractor with a jack. Place props in position. Remove the rear wheels. Remove the right-hand hydraulic cover. Remove the left-hand cover.

MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 Tractors without creeper gears

Drive out the double pins of the coupling sleeves. Slide the sleeves towards each other on the pin. Remove the pin and sleeve assembly. Remove the circlip (1). Remove the pinion (2) (if fitted). Tractors with creeper gears - Remove the creeper gears control fork and the sleeve assembly (linking pin and coupler). Remove the circlip (1). Remove the pinion (2) (if fitted).

MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 Tractors with or without creeper gears

Disconnect the cable. Take out the split pin and remove the control arm. Remove the seal (19). Release the spring (17) using pliers. Undo the nut to release the actuator lever (13) of the cam (14). Remove the circlip (15). Remove the cam (14) with the finger (16). Remove the screws (25). Remove the closing plate (24) and the control shaft (20). Keep the mechanism (31) and the brake discs (30) towards the rear.

Withdraw the closing plate (24), inclining it in order to disengage it from the dowel (18), the finger (23) and the bevel drive pinion (26) and to release the shaft (20) from the housing. Remove the spring (17) and the washer (22). Remove the retainer ring (21) (if necessary) on the control shaft (20). Remove the discs (30) and the mechanism (31).

In case of replacement of mechanism

Undo the nut (4), remove the plate and the pin (6). Remove the split pin (9), take out the pin (8) and the clevis (7). The stud (3) is smeared with Loctite 270 and locked in the clevis (7).

If replacement of the supporting plate is unavoidable

Remove two diametrically opposed screws (28) and screw in two guide studs. The purpose of this is to hold the shims. Unscrew the two remaining screws. Remove the supporting plate. Check that the shims have all remained on the housing. The finger (16) smeared with Loctite 241 is screwed into the cam (14). The finger (23) smeared with Loctite 241 is screwed into the supporting plate (29). The dowel (18) is pushed fully home on the shoulder of the closing plate (24).

Massey Ferguson 3050, 3060, 3080, 3125 - Handbrake Reassembly

Clean and check the parts. Replace any which are defective. In case of replacement of supporting plate (29) - Refit the plate. Smear two screws (28) with Loctite 241 then tighten to a torque of 90-120 Nm. Remove the two guide studs. Smear the other two screws (28) with Loctite 241 then tighten to a torque of 90-120 Nm.

In case of replacement of mechanism

Refit the clevis (7) prepared with the stud (3) and the pin (8). Replace the split pin (9). Fit the lever (13) with its pm (6) on the stud (3) of the clevis. Refit the plate, tighten the nut (4). The plate is rectangular. It must be positioned horizontally, lengthwise, on the pin (6) in the lever (13) to be correct. Replace the discs (30), placing the mechanism (31) between them. Fit the lever (13) on the finger (23).

Check that the discs slide freely on the bevel drive pinion (26). Place the retainer ring (21) (if removed) on the shaft (20). Fit the shaft (20) in the closing plate (24) with the washer (22) and the spring (17). Check that the discs (30) and the mechanism (31) are correctly positioned. Fit and tighten the screws (25) to a torque of 90-120 Nm. Fit the cam (14) with its finger (16). Fit the circlip (15). Replace the spring (17), positioning its ends. Fit the seal (19) supported by the housing.

MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 Tractors with creeper gears

Refit the pinion (2) (if fitted). Position the circlip (1). Refit the sleeve assembly (linking pin and coupler) and the creeper gears control fork. Tractors without creeper gears - Refit the pinion (2) (if fitted). Position the circlip (1). Refit the sleeve assembly (linking pin and coupler) and the creeper gears control fork.

MF 3050, 3060, 3080, 3065, 3070, 3095, 3120, 3125 Tractors with or without creeper gears

Refit the left cover. Position the lever of the cam (14) in contact with the lever (13) so as to obtain a distance of 315 mm ± 12 between the cable fastening axis and the support (3). Fit the cotter pin. Adjust the mechanism (31) with the adjusting nut, so that the cam displacement, from rest position to maximum position, is 60°. Access to the adjusting nut (4) is via the aperture of the plug (11) on the left cover. Reconnect the control.

Adjust the handbrake control. Remove the blocks between the cab supports and the trumpet housings. Fit the washers. Position the cab. Tighten the nuts to a torque of 27-35 Nm and the lock-nuts, smeared with Loctite 270 to 13-20 Nm. Refasten the protecting panels. Refit the right-hand hydraulic cover. Raise the tractor with a jack. Refit the wheels. Remove the props and the jack.

Tighten the wheel nuts to a torque of 400-450 Nm. Remove the blocks at the front of the tractor and between the engine frame and the front axle. Top up the oil level of the rear axle housing. Check the operation of the electrical circuits, of the low pressure switch, of the solenoids and of the filter vacuum switch. Check the operation of the lift. Check for leaks at the joint faces, covers and hydraulic connectors.

Massey Ferguson 3050, 3060, 3080, 3125 Handbrake - Fitting and adjustment of control

Introduce the cable (1) from below towards the cab interior and fasten with the clip (2). Fix the cable end (7) on the brake lever (4) with the pin (5), the washer (6) and the split pin (3). Check that the cable is not constrained. Fit the outer cable stop (2) in the bracket (1). Attach the end of the cable (7) to the lever (6). Place the handbrake lever in the released position. Adjust so as to obtain a distance of 315 mm ± 12 between the nut (5) and the axis of the end of the cable (7).

Tighten the lock-nut (3) on the washer (4). For good alignment of the outer cable stop (2) and the cable (7), the nut (5) and the lock-nut (3) are mounted in front of the bracket (1). Check the operation of the control. Pull the lever. Initial travel should be approximately 8 notches. The warning light on the instrument panel should come on. Release the lever. The control should revert freely to the rest position and the warning light on the instrument panel should go off.

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