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Massey Ferguson 5445, 5465, 5470 PTO - Removable shaft

MF 5400 Series Tractors Service and Repair

The driven gears (5) (6) are fitted on the PTO shaft located on the lower part of the axle housing. These gears are constantly meshed with the double driving gear driven by the upper shaftline whose speed is transmitted by the PTO clutch. The PTO shaft (10) is fitted at the front on a bearing (1) force-fitted in the axle housing, and at the rear on a hub (9) rotating on a bearing (15).

The 540 rpm version has 6 splines, and the 1000 rpm version has 21 splines. In the 540 rpm configuration, the shaft (10) is splined to the gear (5). The gear (6) and ring (4) assembly rotate idle on the shaft (10). In the 1000 rpm configuration, the shaft is splined to the gear (6). The gear (5) and ring (3) assembly rotate idle on the shaft (10). The snap ring (20) holds the shaft in place. Sealing is provided by the ring (14) and the "O" rings (11) (19).

Parts list - (1) Bearing (2) Deflector (3) Ring (4) Ring (5) Gear (540 rpm) (6) Gear (1000 rpm) (7) Circlip (8) Snap ring (9) Hub (10) 540 or 1000 rpm PTO shaft (11) "O" ring (12) Unit (14) Seal ring (15) Bearing (16) Screw (17) PTO speed sensor (18) Nut (19) "O" ring (20) Snap ring

MF 5435, 5445, 5455, 5460, 5465, 5470, 5475 PTO - Replacing the 540 or 1000 rpm shaft

Disassembly

Raise the rear of the tractor to avoid oil drainage. Remove the snap ring (20). Take out the shaft (10). Remove the "O" ring (11) and discard it.

Reassembly

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

Massey Ferguson 5435, 5445, 5455, 5460, 5465, 5470, 5475 PTO - Removing and refitting the rear bearing

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

Refitting

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

Disassembling and reassembling the rear bearing

Remove the rear bearing and perform steps.

Disassembly

Remove the "O" ring (19). Remove the snap ring (20). Separate the shaft (10) from the bearing assembly. Remove the "O" ring (11). Remove the circlip (7). Separate the unit (12) from the bearing (15). Remove the snap ring (8). Extract the bearing (15) from the hub (9). Remove the seal ring (14).

Reassembly

Smear the external surface of the seal ring (14) with Loctite 542. Using a press and a suitable fixture, fit the seal ring (14) up against the shoulder of the unit (12). The double lip must be turned towards the bearing (15). Assemble the bearing. Perform steps 17 to 24 in reverse order and refit the bearing.

MF 5435, 5445, 5455, 5460, 5465, 5470, 5475 PTO - Disassembling and reassembling the 540 and 1000 rpm gears and the front bearing

Disassembly

To remove the gears (5) (6), it is necessary to remove: the linkage cover plate, the top cover plate at the rear of the PTO shaftline, the driving gear and the intermediate shaft. To gain access to the sensor, remove the left-hand ram by removing the lower attachment and by disconnecting the supply hose. Remove the PTO sensor. Remove the rear bearing and perform steps. Remove the gears (5) (6). Extract the bearing (1) and the deflector (2).

Reassembly

Check and clean the components. Replace any defective parts. Smear the deflector (2) with Loctite 648 on its mating face with the housing and fit it into its bore. Turn the opening upwards. Fit the bearing (1) in the housing, up against the deflector (2). Lubricate the rings (3) (4). Refit the gears (5) (6) and screw two guide studs up against the gear (6). The purpose of this operation is to hold the gears in line while refitting the rear bearing. If the rings (3) (4) are damaged, replace the gears (5) (6). Refit the rear bearing.

Smear the thread of the PTO sensor with Loctite "Form A gasket 2" (sensor sealing or equivalent). Adjust the sensor: Screw the sensor in fully, without forcing, until it comes in contact with the gear (6). Unscrew the sensor by 3/4 of a turn. Tighten the nut (18) moderately and connect the harness. Refit the left-hand ram, refit the lower attachment and reconnect the supply hose. Refit the driving gear assembly. Refit the linkage cover plate. Top up the rear axle oil level. Check PTO and PTO brake operation. Check tightness: of the mating faces (spool valve support, linkage cover plate, cover plate, PTO rear bearing).

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