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Massey Ferguson 6497, 6499 PTO - Flange shaft
MF 6497, 6499 - Removing and refitting the
flange shaft
The flange shaft may have 6, 20 or 21 splines.
Removal
Remove off the protector (9). Immobilise the shiftable output shaft (13)
using a locally made V screw (M12). Loosen the screws (6). Remove the
flange shaft (5).
Refitting
Check for the presence of the locating pin (35). Refit the flange shaft.
Immobilise the output shaft. Tighten the screws (6) to a torque of
120-160 Nm. Manually check the mobility of the shiftable output shaft.
Refit the protector.
Massey Ferguson 6497, 6499 - Replacing the
rear bearing cassette seal
Split the rear PTO housing from the centre housing. Remove the rear
bearings and strip the shiftable output shaft (13). Note the position of
the cassette seal (14) in the rear bearing (22). Extract the cassette
seal. Discard the O'ring (15).
Replacing the seal
Clean and check all components. Replace any defective parts. Using the
tool, insert the cassette seal (14) in the bearing (22), turning the
seal lip towards the inside of the PTO housing.
After fitting, check that the seal is positioned as indicated. Fit a new
O-ring (15) on the rear bearing (22). Lubricate the inner rim of the
cassette seal (14) and O-ring (15) with clean transmission oil.
Recondition and refit the bearing (22)/shiftable output shaft (13)
assembly on the PTO housing. Refit the driven pinions (18) (7). If
necessary, refit the sensor located on the lower right-hand side of the
power take-off housing. Moderately tighten the screw. Fit the PTO
housing in a vertical position. Assemble the rear PTO housing to the
centre housing.
Massey Ferguson 6497, 6499 - Shimming the rear
bearings
Split the rear PTO housing from the centre housing. Take off: 540/1000
rpm or, optionally, 750/1000 rpm driven pinions; rear bearing
(22)/shiftable output shaft (13) assembly; bearing cone (19) from the
PTO housing; flange shaft (5) of the shiftable output shaft (13). Note
dimensions A and B. To avoid being hindered by the resistance of the
cassette seal (14) on the shiftable output shaft (13), the seal should
be temporarily excluded during measurement of A and B values.
Dimension A - Using a depth gauge, measure dimension A on the PTO
housing. Dimension B - Rest the bearings/shiftable output shaft (13)
assembly on the rear bearing block. This assembly comprises: bearing
cones (3) (8) and their cup; castellated washer (4); circlips (16) (17).
Ask an operator to exert a strong and constant manual pressure on the
bearing cup (19).
Simultaneously turn the shiftable output shaft (13) from left to right
so as to correctly "seat" the bearing cones in their cups. Measure
dimension B at two opposing points. Take the average of the two
measurements. Calculate B - A. Depending on the result, select a
thickness of shim(s) (23) to obtain a clearance J of 0.05 to 0.15 mm. If
possible, shim so as to obtain minimum tolerance.
Refit: the flange shaft (5) on the shiftable output shaft; the bearing
cup (19) in the PTO housing; the rear bearing (22)/shiftable output
shaft (13) assembly fitted with: a new cassette seal (14), the shim(s)
(23) selected during operation. Lightly smear the thread of the screws
(2) with Loctite 242 or equivalent. Tighten these screws to a torque of
72-96 Nm. Refit the 540/1000 rpm or, optionally, 750/1000 rpm driven
pinions; Assemble the rear PTO housing to the centre housing.
MF 6497, 6499 - Adjusting the cable control
On lever L - Push the control lever L located inside the cab to the 1000
rpm position.
Screw the clevis (1) flush with the threaded end of the cable (6). Fit
the clevis on the lever using clip (7). Tighten the nut (2). Position
the nut on the threaded sheath end (5). Fit the threaded sheath end on
the bracket. Tighten nut (4) and check that the cable is not constrained
in any way.
On link B - Turn link B towards the front of the tractor in the 1000 rpm
position. Screw clevis (9) flush with the threaded part of cable (6).
Fit clevis (9) on link B using clip (10). Tighten the nut (11). Adjust
the stop (12) on bracket (8) using nut (13), taking care that link B
does not move. Tighten nut (14) and check that the cable is not
constrained in any way. Check control operation in the 540 or 750 rpm
positions (depending on option) and in 1000 rpm position.
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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 |