________________________________________________________________________________
Massey Ferguson 6497, 6499 - Clutch unit and driving pinions
Split the PTO housing from the centre housing. Remove the sensor located
on the upper right-hand side of the PTO housing to avoid any
interference with the 1000 rpm pinion.
MF 6497, 6499 - Removing the block consisting
of the clutch unit and unit/driving pinion assemblies
Power take-off with interchangeable shaft
Place the PTO housing flat on a workbench in order to allow removal of
the output shaft (13). Recover the friction washer (20) that may still
be on the driven pinion (7). Take off: snap ring (6); output shaft (13);
driven pinion (7). Recover the friction washer (10) fitted between the
driven pinions (7) (18). Loosen the screws (27). Remove the block
consisting of the clutch unit (15) and unit/driving pinion(s) (23)
assemblies from the PTO housing. If necessary, slightly offset the
driven pinion (18) in order to facilitate removing the block. Remove the
seal rings (22).
Parts list - (5) Hydraulic ring (6) Snap ring (7) 540
or 750 rpm driven pinion (depending on option) (10) Friction washers
53.4x67.8 (13) Interchangeable output shaft (15) Clutch unit assembly
(18) 1000 rpm driven pinion (20) Friction washer 63.5x79.8 (22) Seal
rings (23) Unit/driving pinions assembly (24) Belleville washer (25)
Countersunk washer (26) Snap ring (27) Screw
Power take-off with jaw coupler
Place the PTO housing flat on a workbench. Take off:circlip (2); splined
washer (20). Loosen the screws (27). Tilt the block consisting of the
clutch unit (15) and unit/driving pinion(s) (23) assemblies. Remove it
from the PTO housing while simultaneously removing the driven pinion
(7). Remove the seal rings (22).
Parts list - (5) Hydraulic ring (7) 540 or 750 rpm
driven pinion (depending on option) (13) Jaw coupling output shaft (15)
Clutch unit assembly (22) Seal rings (23) Unit/driving pinions assembly
(24) Belleville washer (25) Countersunk washer (26) Snap ring (27) Screw
1000 rpm power take-off
The clutch unit (15) and unit/driving pinion (23) assemblies of the 1000
rpm PTO can be removed without intervening on the lower shaftline driven
pinion (18). Place the PTO housing flat on a workbench. Loosen the
screws (27). Remove the block consisting of the clutch unit (15) and
unit/driving pinion (23) assemblies from the PTO housing. Remove the
seal rings (22).
Parts list - (5) Hydraulic ring (15) Clutch unit
assembly (18) 1000 rpm driven pinion (22) Seal rings (23) Unit/driving
pinion assembly (24) Belleville washer (25) Countersunk washer (26) Snap
ring (27) Screw
If necessary, extract the hydraulic ring (5) using a suitable slide
hammer puller.
Massey Ferguson 6497, 6499 - Splitting the
block consisting of the clutch unit and unit/driving pinion assemblies
Place the block on a hollow support S. Using a press and the tool
moderately compress the Belleville washer (24) to release the snap ring
(26) of the countersunk washer (25). Remove from the end of the sleeve:
snap ring (26); countersunk washer (25); Belleville washer (24). Split
the clutch unit assembly (15) from the unit/driving pinion(s) assembly
(23) (depending on version). Remove screws (27).
MF 6497, 6499 - Assembling the block
consisting of the clutch unit and unit/driving pinion assemblies
Fit the screws (27) on the unit/driving pinion(s) assembly (23)
(depending on version).
Place the rebuilt block on the support S, itself on a press table. Refit
on the end of the sleeve (10): a new Belleville washer (24), respecting
the assembly direction; the countersunk washer (25), turning its recess
towards the snap ring (26). Using pliers, slightly increase the diameter
of the snap ring (26). Place this snap ring temporarily on the sleeve
(10). Using a press, moderately compress the Belleville washer (24) to
show a groove in which to fit the snap ring (26). Definitively insert
the snap ring into this groove. Check that the snap ring is correctly
positioned. Release the pressure exerted by the press on the Belleville
washer (24). Check that the snap ring (26) is correctly held by the
countersunk washer (25).
Massey Ferguson 6497, 6499 - Refitting the
block consisting of the clutch unit and unit/driving pinion assemblies
If the hydraulic ring (5) needs replacing, fit, using a suitable locally
made fitting drift, a new ring in the rear PTO housing, respecting the
distance of 16 0.1 mm between the block mating face with the PTO housing
and the end of the hydraulic ring. Correct ring positioning aligns its
ports with the 17 bar channel of the rear PTO housing.
PTO with interchangeable shaft
Clean and check all components. Replace any defective parts.On each seal
ring (22), check: the surfaces and sides are not worn; the hooks are in
good condition. Replace the seal rings if necessary. Lubricate the
reused or new rings (22) with clean transmission oil. Refit them in the
grooves of sleeve (10) . Check that each ring rotates freely. If
necessary, slightly offset the driven pinion (18).
Engage the block consisting of the clutch unit (15) and unit/driving
pinion(s) (23) assemblies into the PTO housing. Lightly smear the thread
of the screws (27) with Loctite 242 or equivalent. Tighten these screws
to a torque of 50-70 Nm. Lightly smear the friction washers (10) with
miscible grease. Place these washers on either side of the driven pinion
(18). Refit: driven pinion (7); output shaft (13); snap ring (6). Smear
the friction washer (20) with miscible grease. Place this washer on the
driven pinion (7). Fit the PTO housing in a vertical position.
Power take-off with jaw coupling shaft
Clean and check all components. Replace any defective parts. On each
seal ring (22), check that: the surfaces and sides are not worn; the
hooks are in good condition. Replace the seal rings if necessary.
Lubricate the reused or new rings (22) with clean transmission oil.
Refit them in the sleeve (10) grooves. Check that each ring rotates
freely. Tilt the block consisting of the clutch unit (15) and
unit/driving pinion(s) (23) assemblies. Insert it into the PTO housing,
while simultaneously sliding the driven pinion (7) onto the output shaft
(13). Lightly smear the thread of the screws (27) with Loctite 242 or
equivalent. Tighten these screws to a torque of 50-70 Nm. Refit: splined
washer (20); circlip (2). Fit the PTO housing in a vertical position.
1000 rpm power take-off
Clean and check all components. Replace any defective parts. On each
seal ring (22), check that: surfaces and sides are not worn; hooks are
in good condition. Replace the seal rings if necessary. Lubricate the
reused or new rings (22) with clean transmission oil. Refit them in the
sleeve (10) grooves. Check that each ring rotates freely. Engage the
block consisting of the clutch unit (15) and unit/driving pinion (23)
assemblies into the PTO housing.
Lightly smear the thread of the screws (27) with Loctite 242 or equivalent. Tighten these screws to a torque of 50-70 Nm. Fit the PTO housing in a vertical position. Lightly smear the thread of the PTO sensor with Loctite FORM GASKET 2. Reconnect and adjust this sensor in the following manner: Tighten the sensor home, without forcing, until it comes in contact with the 1000 rpm driving pinion. Unscrew the sensor by 3/4 turn, Tighten the sensor nut moderately. Assemble the PTO housing with the centre housing. Test the clutch and its brake.
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS SPECIFICATIONS |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF FRONT END LOADERS |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS MAINTENANCE |
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
MF TRACTORS TROUBLESHOOTING | ||||
1652 | 1749 | 2620 | 2725 | 2805 |
3050 | 3120 | 3640 | 3709 | 4245 |
4455 | 5320 | 5455 | 5613 | 6150 |
6280 | 6480 | 6615 | 7618 | 7720 |