Specifications, Service and Repair of Farm and Lawn Tractors

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MF 3125, 3065 tractor Pull-type Clutch hydraulic slave cylinder


Removal:

- Split the MF 3125, 3050 tractor between the engine and the gearbox.

- Disconnect the supply pipe (26) (plug the pipe),

- Disconnect the bleed pipe (29)

- Remove the two bolts (18) and the bolt (18A).

- Remove the stave cylinder assembly.

Refitment:

- Clean the threads of the slave cylinder attaching holes.

- Position the slave cylinder assembly on the gearbox cover.

- Clean the two bolts (18) and the bolt (18 A) and coat them with Loctite 241.

- Refit bolts (18) and (18A) and tighten to the torque: 8diam. : 25-35 Nm/10diam : 50-70 Nm.

- Reconnect pipes (26) and (29).

- Clean the clutch housing with a solvent.

- Refit the gearbox to the MF 3125, 3080 tractor.

- Remove air from the clutch hydraulic control system.



Fig.7

Slave cylinder seal replacement

- Split the tractor between the engine and the gearbox.

- Remove the Massey Ferguson 3125, 3065 tractor clutch hydraulic slave cylinder.

- Remove the rubber boot (12).

Remove :

- the elbow union (27), the straight union (28),

- the guide pin (24) on the boot earner (11),

- the boot carrier (11) using the locally made-up tools.

- Remove the guide pin (24).

- Withdraw the piston (15) from the cylinder (19).

Disassembly:

- Remove the piston seals 16-16A and the ring 17.

- Remove the cylinder seals 14 and 14A and ring 13.

- To remove the seals, use a suitably protected screwdriver.

- The bores and grooves of the parts must be free from scoring and damage.

Reassembly of "O" ring 14A and bush 14 in cylinder:

- Clean the cylinder (19).

- Position the cylinder with the grooves facing upwards.

- Lubricate and fit the "0" ring 14A in the deepest groove. Do not twist it.

- Compress the seal into a heart-shape. The lip of the seal 14 must face outwards.

- Fit the seal 14 into the groove and push it gradually towards the "0" ring 14AV

- Lubricate the seal 14 and the bore of the cylinder (19).

- To ensure seal seated properly, use piston 15 as a mandril.

To fit seal 14:

- Protect the threaded part of the piston.

- Locate the piston in the cylinder (the threaded portion of the piston (15) facing the front of the cylinder (19)).

- Centre the piston and introduce it into the cylinder.

- Turn the piston approximately one turn in the cylinder.

- Remove the piston (15). The seal 14 is now fitted.

Reassembly of "o" ring and seal on piston:

- Clean the piston (15).

- Fit the seal 16 on the small diameter of the piston. Important: The lip of the seal 16 must face outwards.

- Place the piston (with the groove facing you) on a pipe gripped in a vice, immobilize the piston.

- Lubricate and fit the oil seal 16A in the deepest groove. Do not twist it.

- Work the seal gradually into the groove using two lengths of tape.

- To ensure seal seated property use cylinder B as a mandril.

- Fit the guide ring 13 into the cylinder. Ensure that it is correctly seated in the groove. (Clearance 2x5 mm).

To fit seal 16:

- Lubricate the seal and the piston (15). Insert the piston (15) into the cylinder (19) using the tool.

- Turn the piston approximately one turn. Remove the piston (15). The seal 16 is now fitted.

- Make the guide ring 13 round. Lightly grease the two ends.

- Lubricate the cylinder bore, the piston, the seals 14Y 16 and guide ring 13.

- Place the assembly in a vice.

- Push the piston approximately 10 mm into the cylinder using the tool.

- Make the long guide ring 17 round. Lightly grease the two ends or equivalent miscible grease.

- Fit the guide ring into the piston groove manually. (Clearance 2 to 5 mm).

- Complete the assembly of the piston into the cylinder using the tool.

- Clean and refit the guide pin (24).

- Clean the thread of the boot carrier (11) and of the piston (15). Apply Loctite 542 to the boot carrier and tighten it on the piston using the tools.

- Line up one of the threaded holes in the boot carrier with the rod (24).

- Coat the rod (24) with Loctite 241 and tighten to a torque of 25-35 Nm.

- Tighten the unions (27) and (28).

- Carry out procedures 2 and 3 in reverse.

- Refit the gearbox to the tractor.

- Remove air from the clutch hydraulic system.

Removing air from the MF 3125, 3070 tractor clutch hydraulic system:

- Run the engine at approximately 1200 r.p.m and restrict the return hose with suitably protected pliers or clamp.

- Connect the union 35C2045 M1 together with its hose to the bleed point (RH side of gear-box).

- Immerse the end of the hose into a receptacle partly filled with transmission oil.

- Operate the clutch pedal. Repeat the action several times until oil tree of air bubbles comes out of the hose.

- Remove the union 3582045 M1 and release the return hose.

Checking piston travel in the slave cylinder:

- Disconnect the two hoses supplying the front differential lock (4WD) and plug the connections.

- Remove the guard and the Massey Ferguson 3125, 3065 tractor 4WD transmission shaft.

- Remove the inspection plate.

- Switch off the engine. Using a pair of dividers, measure the distance between the slave cylinder (19) and the boot carrier (11).

- Fully depress the clutch pedal. Measure the distance again.

- The difference between the two measurements (travel) must be 8-10 mm.

Clutch pedal adjustment:

- Before assembly coat the pins and with molybdenum disulphide grease.

- Coat the threads of the rod with Loctite 542.

- Adjust the rod to obtain a pedal travel of 200 mm between the disengaged positions (pedal against the stop (2)) and the engaged position.

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