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Massey Ferguson 6465, 6480, 6490 Rear PTO - Intermediate shaft and driving gears
On MF 6465, 6480, 6485, 6490 tractors the upper shaftline of the rear
PTO comprises: PTO clutch (1); intermediate shaft (2); layshaft (13);
tapered roller bearings (3) (4) and (7) (8); driving gears (10) (11)
(540-1000 rpm PTO version) or driving gears (10) (11) and (9) (540 E PTO
(power take-off) version); a coupler (5) (540-1000 rpm power take-off
PTO version) or two couplers (5) (540 E PTO version).
Shims (27) fitted at the front end of the layshaft (13) allow the
clearance of the tapered roller bearings to be adjusted.
On the 540-1000 rpm PTO version, the 540-1000 rpm power take-off lever
installed on the left-hand side of the PTO housing (as viewed from the
operator's seat), activates a selector rail (19) and a coupler (5). The
coupler (5) moves either towards the 540-rpm gear (10) or towards the
1000-rpm gear (11) according to the required speed. On the 540E PTO
version, a second lever connected to its own coupler engages this
coupling with the gear (9) to obtain the 540 E economic speed. This
second lever is installed on the right-hand side of the rear PTO housing
(as viewed from the operator's seat). The 540-1000 rpm and 540E PTO rods
are each controlled from inside the cab by a cable.
Massey Ferguson 6465, 6480, 6490 - Rear PTO
Lubrication
The oil enters the rear PTO housing via a restrictor union. The flow
rate is then distributed via a restrictive hole (diameter approx. 1 mm)
to the driving gears and driven gears.
Parts list: (1) Spacer (540-1000 rpm PTO) (2)
Intermediate shaft (3) Bearing cone (4) Bearing cup (5) Coupler(s) (6)
Dowel(s) (7) Bearing cone (8) Bearing cup (9) 540 E driving gear (10)
540 rpm driving gear (11) 1000 rpm driving gear (12) Removable support
(13) Layshaft (14) "O" ring(s) (15) Pushrod screw (16) Nut (17) Set
screw (18) Cup plug (19) 540-1000 rpm selector rail (20) 540-1000 rpm
fork (21) 540 E fork (22) 540 E selector rail (23) Washer with flat
section (540-1000 rpm version) (24) Circlip(s) (25) Shouldered ring (540
E version) (26) 540 E hub (27) Shim(s) (28) Oil deflector (29) "O" ring
(540 E version) (30) Vespel ring (31) Oil restrictor (32) "O" ring, F -
Details 540-1000 rpm PTO (power take-off) / 540E PTO
Massey Ferguson 6465, 6480, 6490 - Partial
kinematics and operation of the safety lock
Partial kinematics
The engine speed is transmitted to the rear PTO clutch located at the
front of the centre housing via a shaftline which passes via: Power
Shuttle, the Dynashift and the GTA1040 transmission gearbox (MF 6465,
6480); Powershift, the Power Shuttle and the GTA1540 transmission
gearbox (MF 6485, 6490). The intermediate shaft (2) is splined to the
layshaft (13) and drives the driving gears (10) (11) and/or (9)
depending on the position of the coupler(s). When a gear transmits the
movement to the lower shaftline, the other gear(s) is/are passive and
turn(s) idle on its/their axis.
540E power take-off safety lock
The safety lock device is only fitted on the 3-speed PTO version
(540-1000 rpm and 540E). It is located at the top and within the rear
PTO housing. It acts as a lock due to the round end of its two
adjustable rails. The selector rails (19) and (22) for the forks are
machined in order to house the locks and to allow their movement.
Operation
When the selector rail (19) engages the 540-rpm gear, it forces the lock
(3) out of its housing. The lock (3) then pushes lock (2), which locks
the 540E selector rail (22) in neutral position and thus prevents any
movement. This principle can be applied to the 540E and 1000-rpm gears.
Massey Ferguson 6465, 6480, 6490 -
Disassembling, reassembling and adjusting the safety lock and adjusting
a pushrod screw
Disassembling the safety lock (540E PTO)
Disconnect the PTO housing from the centre housing. Using a locally
obtained M5 screw, extract the dowel (6) using the tapped hole T in the
dowel. Extract finger D from the selector rail (22) (540E PTO control)
by pulling the rod out of the housing. Remove the set screw (17) fixing
the fork (21) to the selector rail. Using the adjustable sleeve (1) (no
left or right-hand screw), shorten the length of the safety locks (2)
(3). Unscrew: nut (16); pushrod screw (15). Remove the selector rail
(22). Visually note the assembly. Separate and remove the safety locks
(2)(3).
Reassembling the safety lock (540E PTO)
Reassemble the safety lock device by following steps reverse order.
During the reassembly process, observe the following points: Lightly
smear the thread of the set screw (17) with Loctite 221 or equivalent.
Tighten this screw to a torque of 25-35 Nm. If necessary, replace the
"O" ring (14) by sliding it over the pin of finger D via the outside of
the housing so as not to break it on the sharp edge of the housing. Do
not forget to refit the dowel (6). Adjust the safety lock and the
pushrod screw(s).
Adjusting the safety lock (540E power
take-off)
Place a selector rail in neutral position. Engage a gear using the other
selector rail. Adjust the sleeve (1) (no left or right-hand screw) to
give a slight clearance of approx. 0.1 mm. Tighten the nut. Activate
each gear alternately and several times. Engage a 540 or 1000-rpm gear.
Test the safety device by trying to engage the 540E gear: this gear
should not engage. Test the safety device for the other two gears in the
same way.
Adjusting a pushrod screw
Position the selector rail concerned so that one of the flat sections is
opposite the tapped hole of the fork pushrod screw (15). Tighten the
pushrod screw without forcing it in order to compress the ball, then
loosen it by one quarter turn. Clean the thread of the pushrod screw
(15) and the nut (16). Lightly smear the thread of the nut (16) with
Loctite 242 or equivalent. Tighten this nut to 15-20 Nm while holding
the pushrod screw (15) in place. Check that the fork lock matches.
Reconnect the PTO housing to the centre housing. Start the tractor
engine and check the PTO operation.
Massey Ferguson 6465, 6480, 6490 - Removing
and install the selection mechanism
Disconnect the PTO housing from the centre housing. 540-1000 rpm PTO (A)
- Unscrew: nut (16); pushrod screw (15).
540E power take-off (B) - Unscrew: nut (16); pushrod screw (15). Shorten
the length of the safety locks (2) (3). 540-1000 rpm or 540E power
take-off - Remove the lubrication pipe (5). Remove the removable support
(12) holding the front end of the PTO shafts (upper and lower) in place.
Removal of the removable support (12) always involves removing the rear
bearing and the Ground speed PTO coupler (if fitted). Remove the
selector rail(s) (19) (22). Remove unit B, which amongst other
components, comprises the driving gears. Separate the fork(s) from the
coupler(s) (depending on version). Install the fork(s) on the coupler(s)
(depending on version). Reinstall unit B.
Check that the shims and tapered roller bearing cups are present in the
removable support (12). Reinstall the removable support (12) with the
safety locks (2)(3). Lightly smear the thread of the screws (4) with
Loctite 242 or equivalent. Tighten these screws to 68-92 Nm. Install the
lubrication pipe (5), replacing the "O" rings beforehand. Reinstall the
selector rail(s) and the pushrod screw(s) (depending on version). Carry
out adjustments. Reconnect the PTO housing to the centre housing. Start
the tractor engine and check the power take-off PTO operation.
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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 |