________________________________________________________________________________
Massey Ferguson 6497, 6499 - Power take-off
The PTO housing fitted to the rear of MF 6497, 6499 tractor rear axle
contains all mechanical GPA30 power take-off components: Certain
components rest on taper roller bearings whose cups are free fitted or
force fitted onto the PTO housing or clutch unit; front end of the
output shaft rests on a cylindrical roller bearing. Power take-off is
independent of the transmission.
Description and operation of the different
rear PTO versions
There are three versions: long or short interchangeable output shaft,
540/1000 rpm as a standard, or 750/1000 rpm as an option. Jaw coupler -
long or short flange shaft, 540/1000 rpm as a standard, or 750/1000 rpm
as an option. Fixed coupler - 1000 rpm flange shaft.
Massey Ferguson 6497, 6499 - 2 speed power
take-off with long or short interchangeable output shaft (540/1000 or
750/1000 rpm)
The clutch unit assembly (15) is splined to the double driving pinion
(11). This pinion is constantly meshed with the 540/1000 rpm (7) (18) or
750/1000 rpm (7) (18) driven pinions (depending on version) of the lower
shaftline. The output speed of the rear PTO is achieved by replacing the
interchangeable output shaft (13) only.
Parts list - (7) 540 or 750 rpm driven pinion (11)
Double driving pinion (13) Output shaft (15) Clutch unit assembly (18)
1000 rpm driven pinion
MF 6497, 6499 - 2 speed power take-off with
long or short flange shaft (540/1000 or 750/1000 rpm)
The clutch unit assembly (15) is splined to the driving pinions (9)
(11). These pinions are constantly meshed with the 540/1000 rpm (7) (18)
or 750/1000 rpm (7) (18) driven pinions (depending on version) of the
lower shaftline. The rear PTO output speed is achieved when the jaw
coupler (10) is shifted either forward 540 or 750 rpm, or backward 1000
rpm.
Parts list - (5) Flange shaft (7) 540 or 750 rpm driven
pinion (9) 540 or 750 rpm driving pinion (10) Jaw coupler (11) 1000 rpm
driving pinion (13) Output shaft (15) Clutch unit assembly (18) 1000 rpm
driven pinion
Massey Ferguson 6497, 6499 - 1000 rpm power
take-off
The clutch unit assembly (15) is splined to the driving pinion (11).
This pinion is constantly meshed to the driven pinion (18) of the lower
shaftline and drives the output shaft (13) of the rear PTO. On version
C, a spacer (19) replaces the 540 or 750 rpm driving pinion (9). The
fixed coupler (10) is coupled to the driven pinion (18) (1000 rpm). It
is immobilised by a snap ring (1) clipped to the hub (20), itself
immobilised by a snap ring (26) clipped onto the output shaft (13).
Parts list - (1) Snap ring (5) Flange shaft (10) Fixed
coupler (11) 1000 rpm driving pinion (13) Output shaft (15) Clutch unit
assembly (18) 1000 rpm driven pinion (19) Spacer (20) Hub (26) Snap ring
Operation of the upper shaftline - The upper shaftline of the rear PTO
transmits engine speed to the driving pinion through: clutch; series of
three shafts: mainshaft, primary shaft and secondary shaft.
Clutch - The clutch assembly (15) is fed by the low pressure (17 bar)
hydraulic circuit and via push buttons inside the cab (PTO engaged
position).
It is located on the upper shaftline and in front of the driving
pinions. It is supported by two taper roller bearings mounted opposite
in a unit attached to the PTO housing the front clutch bearing cone is
force fitted onto: clutch unit, driving pinion (9) (540 or 750 rpm),
spacer (19); rear clutch bearing cone is free fitted onto all PTO
versions; taper roller bearings are adjusted with clearance using (a)
shim(s) inserted between the driving pinion cover and unit.
Massey Ferguson 6497, 6499 - Power take-off
brake
When the clutch is disengaged and the control button in the cab is
placed in the "PTO brake" position, the 17 bar pressure acts upon a
piston (1), which in turn presses against the unit (6), progressively
braking the rotation of the PTO mechanical components.
Lubrication of the clutch assembly shaft A central channel with radial
ports respectively provide: pressurised lubrication of the clutch discs
and intermediate plates; pressurised lubrication of the driving
pinion(s) (depending on version) of the clutch assembly shaft.
Lower shaftline - The lower PTO shaftline consists of: unit and a
cylindrical roller bearing fitted at the rear of the centre housing;
cylindrical roller bearing directly force fitted onto the centre housing
and preceded by an oil deflector. Rear bearing block consisting of two
taper roller bearings fitted: on a sleeve integral with the rotating PTO
output shaft, directly onto the PTO output shaft; cassette seal
providing PTO lower shaftline output shaft tightness; output shaft
(interchangeable shaft or flange shaft. The output shafts may be of
different lengths and fitted with 6, 20 or 21 splines, depending on the
type and rotational speed tolerated by the implement.
Lubrication of the lower shaftline A central channel with radial ports
provides splash lubrication of: driven pinions and bearings; the
bearings.
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
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 |