Ground PTO (4WD version)


Tractors may be fitted with ground PTO. Unlike the independent PTO system where the PTO speed depends on the engine speed, the proportional PTO is driven by the rear differential pinion and the PTO shaft speed is proportional to the travel speed of the tractor. The pinion comprises a gear (31) constantly meshed with the bell gear (33) (4WD). The sliding gear (10) secures the shaft (8) in rotation with   the shaft (32) (4WD). The gear (3) fitted at the end of the shaft (8) drives the 540 rpm gear on the rear PTO line. The movement of the sliding gear (10) is obtained by a pad hinged on a pin fitted on the left in the lower part of the rear axle housing and controlled by a rod and a cable operated by a lever in the cab.



Parts list 4WD
(01) Plug (02) Circlip (03) Gear (04) Circlip (05) Bearing (06) Circlip (07) Circlip (08) Shaft (09) Circlip (10) Sliding gear (11) Screw (12) Cover plate (13) Needle roller bearing (25) Double pin (26) Double pin (27) Sleeve (28) Sleeve (29) Shaft (30) Circlip (31) Gear (32) 4WD shaft (33) Bell gear



Disassembling the ground PTO (4WD version)


Remove the guard, the 4WD shaft and the lubrication pipe from the engine clutch or Power Shuttle.
Remove the shaft (8). If maintenance is required on the 4WD clutch assembly, the cones and cups, the shaft and the needle roller bearing, see chapter 8. If the gear (31) is removed, it is necessary to remove the right-hand hydraulic cover plate.
Raise the tractor using a jack. Place an axle stand in position. Remove the wheel.

Tractors with no creeper unit
Drive out the double pins (25) (26) from the coupling sleeves (27) (28).
Slide the sleeves towards each other on the shaft (29).
Remove the assembly (shaft and sleeves).
Take off the circlip (30) and remove the gear (31).

Tractors with a creeper unit
Remove the fork, the sleeve assembly, the connecting shaft and the coupler.
Take off the circlip (30) and remove the gear (31).

Reassembling the ground PTO (4WD version)


Check and clean the components. Replace any defective parts.
If carrying out an operation on the gear (31)

Tractors with a creeper unit
Install the gear (31). Refit the circlip (30).
Install the fork, the sleeve assembly, the connecting shaft and the coupler. Fit the sleeve (28) with the long offset between the pin and the 4WD gear. Replace the pins. Adjust the fork.

Tractors with no creeper unit
Install the gear (31). Refit the circlip (30).
Install the assembly (connecting shaft and sleeves) then position the coupling sleeves (27) (28) on the shaft (29).
Install two new double pins (25) (26) on the coupling sleeves. Fit the sleeve (28) with the long offset between the pin and the 4WD gear. The long double pin is fitted on the sleeve (27).

Tractors with or without creeper unit
Install the right-hand hydraulic cover plate. If you have disassembled the 4WD clutch assembly, the cones and cups, the shaft and the needle roller bearing, see chapter 8 for reassembly.
Place the sliding gear (10) on the shaft (32). Turn the small shoulder E towards the shaft (32).
Install shaft (8).
Top up the rear axle oil level. Refit the hitch hook. Check the correct operation of the proportional PTO.

Check tightness:
- of the mating face of the cover plate underneath the rear axle housing.
- the right-hand hydraulic cover plate (if removed).
- Hydraulic unions

Assembling and adjusting the Control


Place lever in the proportional PTO position (clutch engaged).
Screw the clevis (1) level with the end of the threaded part of the cable (6).
Install the clevis (1) onto lever L with the clip (7). Tighten the nut (2).
Adjust the sheath end (5) so that the nut (3) is level with the end of the threaded part.
Tighten nut (4), ensuring that the cable is not pinched.



Place the rod (8) in the "engaged" position "a" and ensure that it is correctly locked.
Screw the clevis (1) level with the threaded part of the cable (6)
Install the clevis (1) to the rod (8) using the clip (7). Tighten the nut (2).
Adjust the sheath end (5) using the nut (4) while ensuring that the rod (8) is still locked in position "a".
Tighten the nut (3). Check the correct operation of the control in the "disengaged" position "b" and check that the cable is not pinched in any way when in position "a".
Check for correct operation of the instrument panel indicator light.