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Massey Ferguson 3050, 3060, 3080, 3125 Rear Axle - Lift cover
The lift cover is mounted on the upper face of the rear axle housing.
The shaft (4) which has the two lift arms (5) and (11) splined to it is
supported by bushes (8). Cam (9) on the lift shaft (4) provides the
means for sensor (26) to monitor position of lift arms. This information
is transmitted to the Electronic Linkage Control (ELC) system. To ensure
correct play between the lift arms and the cover, shims are fitted on
the left hand end of the shaft. The rear face of the lift cover supports
the auxiliary spool valves. The vehicle speed sensor (15) is screwed in
the front oi the cover. The cover also supports lever (21) for economy
(4 speed) PTO.
Parts list - (1) Washer, (2) Bolt, (3) Retainer, (4)
Lift shaft, (5) Right-hand lift arm, (6) Nylon ring, (7) O-ring, (8)
Bush, (9) Cam, (10) Lift cover, (11) Left-hand lilt arm, (12) Shim(s),
(13) Bush, (14) Set screw, (15) Vehicle speed sensor, (16) Nut, (17) Cup
plug (2-speed PTO), (18) Screw (4-speed PTO), (19) Control finger
(4-speed PTO), (20) О-ring (4-speed PTO), (21) Lever (4-speed PTO), (22)
Screw (4-speed PTO), (23) Elbow connector, (24) Bolt, (25) Nut, (26)
Position sensor, (27) Cup plug, (28) Threaded plug, (29) Seal, (30)
Threaded plug, (31) Seal
Massey Ferguson 3050, 3060, 3080, 3125 - Lift
Cover Removal and Disassembly
Removal
Remove the sheet metal. Remove the rear fastening screws to the cab
(remove only the central and lower screws to the guard plates to gain
access to the cab fastening screws). Raise the cab. Place a block
between the cab and the trumpets. Disconnect: the supply hose to the
spool valve; supply hose to the lift valve; return hose. Remove the
bolts for the spool valve support. Remove the support swinging the
assembly out of the way, without disconnecting the controls.
Disconnect: vehicle sensor wire assembly (Autotronic, Datatronic);
position sensor wire assembly; differential lock pipe; cable (4-speed
PTO, if fitted); cable(shiftable PTO, if fitted). Unscrew the pipe at
both ends and remove the support for the trailer brake connector if
fitted. Remove the upper pins from the rams and lift rods. Remove the
fastening bolts for the cover. The PTO control cable supports (depending
on the version) are fixed by the bolts for the cover. Lift there over
and remove it.
Disassembly
Place the cover on a work bench. Remove the elbow connector. Unscrew the
nut (16) and remove the vehicle speed, sensor (15). Unscrew the nut (25)
and remove the position sensor (26). For MF 3050, 3060, 3080, 3065,
3070, 3095, 3120, 3125 tractors equipped with economy 4-speed, carry out
operations. Undo the Allen screw (22) in the lever (21). Undo the screw
(18).
Remove the control finger (19). Remove the O-ring (20). Flatten tabs
locking the bolts (2) retaining the lift arms. Undo the screws. Remove
the washers (1). Remove the shim(s). Remove the lift arms (5) and (11).
Remove the nylon rings (6) and the O-rings (7). Remove the set screws
(14) in the cam (9). Withdraw the lift shaft (4) from the cover. Remove
the cam (9). Withdraw the bushes (8). Remove the cup plug (17) (2-speed
PTO).
Massey Ferguson 3050, 3060, 3080, 3125 - Lift
Cover Reassembly
The bushes (13) are mounted with Loctite 648 at a distance of 40.50 mm
from the face. Clean and check the parts. Replace any which are
defective. Clean the joint faces of the lift cover and of the spool
valve support. Fit the bushes in the cover. Fit the cup plug (17)
smeared with Loctite 542 flush with the cover (2-speed PTO). Mount the
lift shaft (4) and the cam (9) in the cover. Ensure that the direction
of the shaft and the position of the cam are correct. Tighten the set
screws (14) smeared with Loctite 241 to a torque of 5 Nm.
Apply this torque so as not to deform the cam. Position the O-rings (7)
and the nylon rings (6). Note: Protect the splines of the shaft.
Lubricate the О-rings before mounting. Grease the splines of the shaft
(4) (Anti-Seize Grease or equivalent). Fit the lift arm (5) (sensor
side), the washer (1). the retainer (3) and the screw (2). Grease the
face of the cover (Anti-Seize Grease or equivalent) before fitting the
arms. Tighten the screw (2) so as to align two flat sides of the screw
head with the two tabs of the retainer(3). Bend back the tabs.
Carry out shimming of the shaft (4) to obtain: J1 = +0.05 to +0.20
maximum. Mount the arm (11), the washer (1) and the bolt (2). Grease the
face of the cover (Anti-Seize Grease or equivalent) before mounting the
arm. Tighten the bolt so as to position the lift arms (5) and (11)
correctly on the shaft. Remove the bolt (2) and the washer (1) at the
left end of the shaft. Measure the distance between face A of the shaft
and face В of the arm using a depth gauge. By measuring dimension X,
determine the thickness of spacers Y needed to obtain: J1 = +0.05 to
+0.20 maximum. J1 = X + Y.
Mount the previously selected shims, the washer (1), the retainer (3)
and the bolt (2). Tighten the bolt (2) so as to align two flat sides of
the screw head with the two tabs of the retainer (3). Bend back the
tabs. For MF 3050, 3060, 3080, 3065, 3070, 3095, 3120 tractors equipped
with economy 4-speed PTO, carry out operations. Refit the finger (19).
Mount the O-ring (20) from the exterior side of the cover. Smear the
screws (18) and (22) with Loctite 241 and tighten. Check that the
control functions smoothly. Fit the elbow connector (23).
Massey Ferguson 3050, 3060, 3080, 3125 - Lift
Cover Refitting
Clean the joint face of the cover on the rear axle housing. Smear the
joint face with a sealing compound (Master Joint 510 Loctite or
equivalent). Lift cover into position. When refitting the cover, ensure
that the supply pipe of the differential lock and the control finger
(4-speed economy PTO) engage properly in their respective positions.
Mount the supports for the PTO control cables (depending on the version)
and fit the bolts (24) of the cover (10).
Tighten to the following torque: 12 mm diameter bolt = 72-96 Nm, 16 mm diameter bolt = 160-200 Nm. A heavy-duty cover and five new bolts (24) has been released on MF 3125 tractor. The tightening torque of 16 mm diameter bolts is 240-320 Nm instead of 160-200 Nm. Refit the upper pins to the rams and lift rods.
Refit the trailer brake valve support if fitted. Retighten the pipe at both ends. Refit: differential lock supply pipe (3); cable (4) (4-speed PTO, if fitted); cable (5) (shiftable PTO, if fitted). Fit the vehicle speed sensor (15) with Loctite 577 Sensor Sealing or equivalent (Autotronic, Datatronic tractors). Screw in the speed sensor into contact with the crown wheel, without forcing it.
Unscrew the sensor 3/4 of a turn so as to obtain a clearance of approx.
1 mm between the sensor and the crown wheel. Tighten the nut (16)
moderately. Connect the sensor. Fix the harness assembly with a clip.
Clean the joint face of the spool valve support. Coat the joint face of
the spool valve support with a sealing compound (Master Joint 510
Loctite or equivalent). Refit the support and spool valve assembly.
Smear the thread of the two lower screws (4) with Loctite 510. Fit and
tighten the bolts (4) in the spool valve support to a torque of 50-70
Nm. Reconnect: supply hose (1) to the spool valve; supply hose (3) to
the lift valve; return hose (2). Adjust the PTO control (4-speed) and
the PTO control (shiftable). Remove the blocks between the cab supports
and the trumpets. Position the cab. Refit the rear fastening screws of
the cab.
Tighten the nuts to 27-35 Nm and the lock-nuts smeared with Loctite 270 to 13-20 Nm. Refasten the guard plates. Fit and adjust the position sensor. Smear the thread of the sensor (26) with a sealing compound (Hylomar or equivalent), then screw in the sensor a few turns and connect the harness. Start the engine. Using the external control, make sure that the lift arms are in the fully raised position (relief valve blowing).
Stop the engine, then make a mark on the cover and on one arm. Screw in the sensor (without forcing it) until it meets the cam (9) and unscrew by approximately one turn (1.5 mm). Fix the harness. Start the engine. Using the internal control, lower and raise the lift arms. Check the position of the moving mark on the arm. The difference between the two marks should be approx. 3 mm. If the difference is greater than 3 mm, unscrew the sensor slightly. If the difference is less than 3 mm, retighten the sensor slightly.
Tighten the nut (25) to a torque of 25 Nm using a suitable spanner. Check for leaks: at the joint between the lift cover and the spool valve support, at the hydraulic connectors. Refit the sheet metal. Version without lift - The holes of the shaft (4) are plugged with caps (27) sealed with Loctite 542. The position sensor (26) is replaced with a threaded plug (28) equipped with a seal (29). Version without Autotronic - The vehicle speed sensor (15) is replaced with a threaded plug (30) equipped with a seal (31).
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MF TRACTORS SPECIFICATIONS |
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MF FRONT END LOADERS |
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MF TRACTORS MAINTENANCE |
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MF TRACTORS TROUBLESHOOTING | ||||
1652 | 1749 | 2620 | 2725 | 2805 |
3050 | 3120 | 3640 | 3709 | 4245 |
4455 | 5320 | 5455 | 5613 | 6150 |
6280 | 6480 | 6615 | 7618 | 7720 |