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Massey Ferguson 3050, 3060, 3080, 3125 PTO - Intermediate shaft, Driving pinion, Power-take-off brake

MF 3000-3100 Series Tractors Service and Repair

The drive from the engine is transmitted to the power take-off clutch mounted at the front of the center housing. The intermediate shaft (2) is connected by splines at one end to the clutch and at the other end either to the double pinion (13) in the 2-speed PTO version or to the coupler (31) in the 4-speed economy PTO version. The compound pinion (13) turns on two taper roller bearings (3) (4) and (7) (8), mounted in the bore of the center housing and the top link support (10) respectively. A piston housed in the 3rd point support and controlled by the 17 bar hydraulic circuit enables the compound pinion (13) to be braked when the control lever is moved to the PTO braking position.

Parts List - (1) Clutch, (2) Intermediate shaft, (3) Bearing cup, (4) Bearing cone, (5) Washer, (6) Bolt, (7) Bearing cone, (8) Bearing cup, (9) Brake piston, (10) Top link support, (11) Shims, (12) O-ring, (13) Driving pinion, (14) Compound pinion assembly, (15) Deflector, (16) Washer, (17) Needle roller bearing, (18) Compound pinion, (19) Spacer, (20) Needle roller bearing, (21) Washer, (22) Set screw, (23) Shaft, (24) Locking screw, (25) Nut, (26) Fork, (27) Screw, (28) Needle roller bearing, (29) Circlip, (30) Ring, (31) Dog tooth coupler, (32) Circlip, (33) Washer, (34) Dog tooth pinion, (35) Shaft, (36) Cup plug

MF 3050, 3060, 3080, 3125 PTO Operation

2-speed PTO

When the PTO solenoid valve feeds the clutch, the intermediate shaft (2) is driven. This in turn drives the compound driving pinion (13) which engages constantly with the 540 rpm and 1000 rpm pinions of the lower line.

4-speed PTO

This feature enables speeds of 540 rpm or 1000 rpm to be obtained with an engine speed of 1550 rpm. Standard position (engine speed 2000 rpm) - When the coupler (31) is moved forwards, the intermediate shaft (2) turns with the shaft (35) which drives the compound driving pinion (13). This configuration is identical to the 2-speed PTO version. Economy position (engine speed 1550 rpm) - When the coupler (31) is moved backwards, the drive is transmitted to the coupler (34) (fitted loose on the Shaft (35)) and to the compound pinion (18) which drives the driving pinion (13). The ratio of the Compound pinion (18) is 1.292.

Power-take-off brake

The movement of the control lever in the cab acts on an electrical contactor which enables the solenoid valve of the PTO brake mounted on the right cover to open. Oil is supplied to the chamber situated behind the piston (9). The piston moves and presses the bearing cup (8) against the bearing cone (7), progressively immobilizing the driving pinion (13) which constantly engages with the 540 and 1000 rpm pinions.

Massey Ferguson 3050, 3060, 3080, 3125 - 2-speed PTO

Disassembly

Disconnect: auxiliary spool valve supply hose; supply hose of the lift valve; return hose. Remove the bolts of the auxiliary spool valve support. Detach the auxiliary spool valve support. Tilt the support and auxiliary spool valve assembly without detaching the control cables. Disconnect the supply tube of the PTO brake. Disconnect the lubrication tube. Remove the bolts and the top link support. Withdraw the pinion and shaft assembly held by the washer and screw. Remove the bearing cone. The shaft (2) is mounted in the clutch (1) without locking screw.

Reassembly

Check and clean the parts. Replace those which are defective. Refit the bearing cone. Fit the pinion (13) and shaft (2) assembly held by the washer (5) and screw. Clean the joint face of the top link support. Smear the joint face of the housing with a sealing compound (Loctite 510 or equivalent). To ensure the lubrication of the bearing cone, a cup plug (36) is fitted without Loctite, recessed into the face of the housing.

Refit the top link support. Fit and tighten the bolts to a torque of 130-170 Nm. Ensure that the cup is present. Reconnect the supply tube of the PTO brake and the lubrication tube. Clean the joint face of the spool valve support. Smear the joint face of the support cover with a sealing compound (Loctite 510 or equivalent). Refit the support, tilting it. with the control cables.

Smear the threads of the two lower bolts with Loctite 510. Fit and tighten the bolts to a torque of 50-70 Nm. Reconnect: spool valve supply hose; supply hose of the lift valve; return hose. Check the operation of the PTO and its brake. Check for leaks at the joint faces (spool valve support, top link support); at the hydraulic connectors.

Massey Ferguson 3050, 3060, 3080, 3125 - 4-speed economy PTO

Disassembly

Remove the left side cover. If removing the screw (27) and the intermediate shaft (2). Disconnect: spool valve supply hose; supply hose of the lift valve; return hose. Remove the support. Tilt the support and spool valve assembly without detaching the cables. Disconnect the lubrication tube. Remove the bolts of the top link support and detach it. Remove the nut and the locking screw of the fork. Remove the screw (22).

Withdraw the shaft (23) from the compound pinion assembly (14) in order to disengage the fork (26). To disengage the fork atone, gently putt the shaft (23) towards the rear. Remove the friction washers (16) and (21). Take care not to drop the washers in the housing. Withdraw the compound pinion assembly (14) (through the aperture of the spool valve support for version without shimming only).

Remove the needle roller bearings (17) and (20) and the spacer (19) of the pinion (18). Remove the circlip (32). Use short-handled pliers to facilitate access to the circlip. Withdraw the pinion (13) and shaft (35) assembly held by the washer (5) and bolt. Remove the flat washer (33). Take care not to drop the circlip and the washer in the housing. Hold the pinion (34) and the needle roller bearing (28).

The bearing cone (4) remains in the cup (3) during removal of the pinion (13). Remove the pinion (34) and the needle roller bearing (28). Remove the bearing cone (4). Remove the hexagon socket setscrew (27) (if necessary). Withdraw the shaft (2) and the coupler (31) (if necessary). The circlip (29) remains on the shaft (2).

Reassembly

Clean and check the parts. Replace those which are defective. Refit the shaft (2) and the coupler (31) (if removed). Smear the screw (27) with Loctite 221 and tighten (if removed). Refit the bearing cone. Advance the pinion (13) prepared with the shaft (35). Fit the coupler (34), the needle roller bearing (28), the washer (33) and the circlip. Push on to the pinion (13). Position the washer (33). Fit the circlip (32).

In the pinion (18), place the spacer (19) and the needle roller bearings (17) and (20). Position the compound pinion assembly (14). Fit the washer (16) smeared with miscible grease (Amber Technical or equivalent). Lightly engage the shaft (23) to hold the washer (16) in place. Fit the washer (21) smeared with miscible grease. Centre the compound pinion assembly (14).

Mount the shaft (23) finally in the pinion assembly (14) and in the fork (26), ensuring that the hole of the screw (22) is properly positioned. Smear the screw (22) with Loctite 542. Fit and tighten to a torque of 28-43 Nm. Clean the joint face of the top link support. Smear the joint face of the housing with a sealing compound (Loctite 510 or equivalent). Ensure that the cup is present. Fit and tighten the bolts to a torque of 130-170 Nm. Reconnect the tubes. Refit the screw (24) and the nut (25) on the fork (26).

Adjustment of locking of fork (26): Position the fork (26) and the locking screw (24) on the flat part M of the shaft (23) (between the two locking notches). Tighten the screw as far as it will go so as to compress the ball. Loosen the screw by 1/4 of a turn. Smear the nut (25) with Loctite 241. Tighten to a torque of 15-20 Nm. Check that the fork is locked correctly. Adjust the control. Clean the joint face of the spool valve support.

Smear the joint face of the support with a sealing compound (Loctite 510 or equivalent). Refit the support, tilting it, with the control cables. Smear the threads of the two lower bolts with Loctite 510. Tighten the four screws to a torque of 50-70 Nm. Reconnect the hoses. If the screw and intermediate shaft (2) have been removed, refit the left side cover. Check the operation of the PTO and its brake. Check for leaks at the joint faces (spool valve support, top link support, left side cover), at the hydraulic connectors.

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