Specifications, Service and Repair of Farm and Lawn Tractors

________________________________________________________________________________

Massey Ferguson 3060, 3070 Tractor Push-type Clutch


Description

This is a diaphragm push-type clutch. The master cylinder is supplied by the low pressure hydraulic system Drive to the gearbox is through the disc (6) which engages with the splined gearbox input shaft.

MF 3070, 3085, 3065 tractor Push-type Clutch Construction

The slave cylinder (11) and guide (17) are fitted on the front face of the input shaft housing. The release bearing carrier (9) moves between guide (17) and the cylinder 11.

"Composite" seals 14 and 14A seal the release bearing earner and the slave cylinder. Seals 15V /15A and 16 seal the guide and the release bearing carrier.

The clutch release bearing (19) is a force fit on the bearing carrier. The self-centring release bearing is sealed. The ball bearing races are sealed and the lubrication is maintained by the grease during rotation.

Clutch disengagement

Depressing the clutch pedal moves the control rod which in turn operates the piston of a master cylinder. The quantity of oil displaced by this piston passes through the hole drilled in the side of the slave cylinder (11) and moves the release bearing carrier (9) and release bearing (19) assembly forwards.

The diaphragm in the clutch cover (7) is compressed, releasing pressure on the clutch plate and the disc (6) is released.

Clutch engagement

Releasing the clutch pedal causes a drop in pressure in the slave cylinder. The diaphragm pushes the release bearing carrier rearwards and the pressure plate forwards. The disc (6) is held between the pressure plate and the engine flywheel and transmits drive to the gearbox input shaft.

MF 3060, 3080, 3050 Tractor Push-type Clutch Specifications


Clutch control - Push-type
Plate load - 1300 kg
Number of vanes - 6
Type of vane - Non-progressive
Disc diameter - 330 mm
Friction linings - Cerametallic



Fig. 1A/2A. Massey Ferguson 3050, 3085 Tractor Push-type Clutch (Parts list)

(1) Engine flywheel, (2) Flywheel ring gear, (3) PTO shaft drive hub, (4) Engine flywheel attaching bolts, (5) Clutch cover plate dowel pins, (6) Clutch friction disc, (7) Clutch cover plate, (8) Bolts attaching cover plate to flywheel, (9) Clutch release bearing carrier, (10) Rubber boot, (11) Cylinder, (12) Cylinder attaching bolt, (12A) Cylinder attaching bolt, (13) "O" ring, (14) Cylinder oil seal, (14A) Cylinder "O" ring, (15) Clutch release bearing carrier seal, (15A) Clutch release bearing "O" ring, (16) Scraper ring, (17) Guide, (18) Dowel, (19) Clutch release bearing, (20) Supply pipe grommet, (21) Supply pipe, (22) Cylinder supply 90° union, (23) Cylinder bleed straight union, (24) Bleed pipe, (25) Bleed pipe union, (26) Bleed point



MF 3080, 3060, 3050 Tractor Clutch cover plate



Fig.1

Disassembly:

- Split the Massey Ferguson 3060, 3065 tractor between the engine and the gearbox.

- Locate tool (4 cyl Fig.1) to retain the cover plate/disc assembly.

- Gradually slacken the bolts (8) attaching the cover plate (7) to the engine flywheel (1).

- Remove the cover plate and the disc (6).

- Remove the three dowel pins (5) on the flywheel.

Reassembly:

- Clean the flywheel with a solvent.

- Check the flywheel friction surface.

- Lightly coat the PTO shaft hub splines in the flywheel with Molybdenum disulphide grease.

- Fit the three dowel pins (5).

- Using tool, center the clutch disc (6) on the flywheel. The longest section of the hub must face the diaphragm.

- Refit the clutch cover plate.

- Progressively tighten the bolts (8) to a torque of: 50-70 Nm (4 cyl.) 30-35 Nm (6 cyl.)

- Withdraw tool MF 457.

- Refit the gearbox to the engine.

MF 3060, 3080, 3050 Tractor Engine flywheel

Disassembly:

- Split the Massey Ferguson tractor between the engine and gearbox.

- Remove the engine clutch.

- Immobilize the flywheel (1).

- Remove the six bolts (4) attaching the flywheel to the crankshaft.

- Remove the flywheel and the PTO shaft hub (3).

Reassembly:

- If the friction surface of the flywheel is scored, it can be skimmed.

- Grind surface A as necessary to obtain dimension X - 26 mm mini. Surface finish 2.5 microns maximum.

- Measure dimension Y, reduce surface B to obtain a measurement of 34.1 mm to 34.2 mm.

- Shorten the three dowel pins (5) accordingly.

- Check that the cover plate attaching bolt holes drilled in the flywheel are the correct depth; if not, drill to the correct depth. After skimming the flywheel clean it with a solvent.

- The release bearing PN3384863 M92 (45,5 mm long) is only used as repair part. If the flywheel has been skimmed on a tractor equipped with the old bearing (41 mm long) it is mandatory to replace it by the 45,5 mm long bearing.

- Do not fit a 3100 clutch disc if the flywheel has been skimmed.

- Fit two dowel pins into the flywheel attaching holes.

- Refit the flywheel and the hub (3).

- Coat the bolts (4) with Loctite 241.

- Refit the six bolts (4) and tighten to a torque 110-140 Nm (4 and 6 cyl.) Release the engine flywheel..

- Refit the gearbox to the MF 3085, 3070, 3065 Tractor.

Flywheel ring gear replacement Disassembly:

- Remove the engine flywheel.

- Carry out procedures 2 and 3.

- Carry out procedures 4 and 5.

- Refit the engine flywheel.

Clutch release bearing

As disassembly of the clutch release bearing entails its removal from the slave cylinder, seal replacement is recommended to avoid the risk of leakage during service.

Disassembly - Using a suitable drift punch, remove the release bearing through me three holes in the slave cylinder.

Reassembly - Using a suitable assembly to support the outer collar, press the release bearing up against the release bearing earner shoulder.

Coat the contact surface of the release bearing and carrier with Loctite 270. Do not put Loctite into the bearing.

________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________