Split the tractor between Heavy Duty Transmission and Intermediate housing


The contour of the intermediate housing is different. The drain plugs have the same special feature as mentioned for the one on the intermediate housing, Powershift transmission

Special point
Mark then disconnect the hoses coming from the right-hand hydraulic cover to the cooler. Blank the hoses and ports.
On the gearbox, mark then demate the connectors on the solenoid valves at the Dynashift valve (version with mechanical reverse shuttle) or at the clutch control unit (version with power shuttle).
Remove the chassis reinforcements located either side of the gearbox (if installed).


Fig.1

Remove:
- the pipes near the clutch control valve and remove latter, without disconnecting the hose coming from the master-cylinder (version with mechanical reverse shuttle).
- the pipes near the clutch control unit (version with power shuttle).
Remove clutch lube pipe (17) located between intermediate housing (19) and spacer (16) (Fig.1 - 2).


Fig.2

Remove the 17-bar pipe coming from the right-hand hydraulic cover to the selector cover and the 17bar hose feeding to the power-assisted braking.
Disconnect the end of the gearbox lube pipe fitted on the outlet of the right-hand hydraulic cover.
Remove or disconnect the following items on the selector cover:
- harness of temperature sensor and Hare/Tortoise electro-valve,
- return hose from brake-master-cylinder tank,
- return hoses from steering unit and power assisted braking,
- gear control lifting arm.
- control cables of the mechanical reverse shuttle
- creeper unit control (depending on option).
Drain the fuel tanks. Remove the side tank.

Separating the gearbox from the intermediate housing.


Fig.3


To access screws (7) (Fig.4), remove the closing plate under the gearbox. During separation, mark the direction of assembly of sleeve (1) on output shaft (47) on gearbox housing "C" (Fig.3).


Fig.4

Assembling the gearbox and the intermediate housing

Check the presence of locating pins (4) (Fig.4) on the gearbox.
Check that the undercut part of the PTO shaft (2) is pointing towards hydraulic-pump drive gear (1) (Fig.5).


Fig.5

Before assembling, coat one seat of spring (3) with Loctite 401 adhesive. Slide the spring on shaft (2), the Loctited seat pointed towards the shouldered part of the shaft.

Clean the mating surfaces of the gearbox and the intermediate housing.
Coat the jointing surface of the housing with a sealing product Loctite 510 or equivalent.
Screw two studs diametrically opposite into the intermediate housing.
Check the presence of sleeve (1) on output shaft (47) (Fig.3).

The internal unsplined part of sleeve (1) must be pointed towards the tractor rear axle.

Assemble the gearbox to the housing.
Remove the guide studs. Install the following screws and nuts and torque as shown (Fig.4) :
- (1) : 240 - 320 Nm
- (3) : 300 - 400 Nm
- (5) : 240 - 320 Nm
- (7) : 300 - 400 Nm

Notes:
- Studs (2) and (6) (Fig.4) are lightly coated with Loctite 270 and locked into the intermediate housing,
- Locating pins (4) (Fig.4) are hard-sleeved into the gearbox housing.

During positioning of the cab, check the behaviour of the gear control lifting arm. Reinstall and adjust the gear lifting arm.

Reconnect and adjust the control cables of the mechanical reverse shuttle.
Reinstall or reconnect the following items on the selector cover:
- creeper control, if fitted
- return hose from power-assisted braking and return hose from steering unit,
- return hose from brake master-cylinder tank,
- harness of temperature sensor and Hare/Tortoise solenoid valve.
Perform the following operations:
- reconnect the transmission lube pipe,
- reinstall the 17-bar pipe on the selector cover, and the 17-bar hose feeding to the power-assisted braking,
- reinstall lube pipe (17) (Fig.3),
- clean the mating surfaces of the clutch valve or of the clutch control unit (depending on version) and of the housing.
- coat the mating face of the housing with sealing product Loctite 510 or equivalent,
- reinstall the clutch control valve (version with mechanical reverse shuttle) or the clutch control unit (version with power shuttle). Torque the screws to 25 - 35 Nm. Reconnect the pipes and the solenoid valve connectors on the Dynashift valve or on the clutch control unit (depending on version).
- Fit the solenoid-valve connectors onto the of Dynashift valve.
- Reconnect the cooler hoses, observing the markings made during disassembly.
Reinstall the side tank. Reinstall and adjust the chassis reinforcements.