Dana final drive units – Removing and install


Disassembling and reassembling the wheel hub


Remove the planet carrier.
Remove the circlip (29) and the sun gear (28). To avoid damaging the thread of the swivel housing (47), it is recommended to correctly unlock the nut (27) and to loosen it using the socket ref. 3376880M1.
Sling and remove the wheel hub (22).
If necessary, extract bearing cones (18) (25). Drive out the cups (19) (23). If the bearings are to be reused, pair up the cones and cups.
Check and clean the components. Replace any defective parts.

Assembling bearing cones and cups 


Reused cups (19) (23) and cones (18) (25).
Install the previously paired cups and cones to the respective machined shoulders on the wheel hub, the swivel housing and the ring gear carrier.

New cups and cones
- The bearing cups and cones must be of a special class (width tolerance 0.1 mm instead of 0.2 mm).
- Bearing shimming is determined according to the machined tolerances of the housing (47), hub (22) and ring gear carrier (42).
- The parts listed above can be replaced individually.
To correctly guide the hub (22) onto the cassette seal (45), fit the ring gear carrier (42). If the hub (22) does not rotate freely after assembly, look for the component(s) that are causing the problem.
Lubricate the splines of the swivel housing (47).
Degrease the thread of the nut on the swivel housing.
Lightly smear the nut (27) with Loctite 270 or equivalent and tighten to a torque of 400 - 450 Nm.
Lock the nut in the housing groove by bending its collar, without breaking it.
Reinstall the sun gear (28) and the circlip (29).
Reinstall the planet carrier.

Replacing a wheel stud
Chock the rear wheels. Apply the hand brake.
Raise the relevant side of the tractor with a jack, position an axle stand and take off the front wheel.
Drive out the defective stud.
Lightly smear the serrated area of the new stud with Loctite 270 or equivalent and insert it using a bronze drift and a suitable hammer.
Reinstall the wheel. Remove the axle stand and the jack. Tighten the nuts to a torque of 400 - 450 Nm.

Disassembling, reassembling and shimming the swivel housing

Remove the planet carrier.
Take off the sun gear and wheel hub. If necessary, remove the seal (45) using a suitable puller or a makeshift fitting. Remove the pin and the nut from the steering ball joint. Extract the ball joint.
Support the swivel housing (47) with a suitable sling.
Take out the screws (1), and remove the cover plate (15) and cup (14). Extract the lower pivot pin (11).
Repeat for the upper pivot pin (7).


If required, extract the cones (5) (13) from the pivot pins.
Cover the splines of the universal joint shaft to avoid damaging the seal (16).
Remove the swivel housing (47).
If necessary, take off the seal (16) and drive out the ring (17). The ring is adhered with Loctite 270.
If necessary, remove the universal joint shaft. Take off the protective ring (40), seal (8) and extract the ring (9).
Check and clean the components. Replace any defective parts.
If removed, Install the ring (9) and the seal (8) up against the shoulder of the housing (52). Lubricate the seal (8). Reinstall the universal joint shaft. Insert a guide via the filler hole to align the left-hand side of the shaft with the differential.
If removed, Install the ring (17) and the seal (16) up against the shoulder of the swivel housing (47).
Replace the seals (6) (12). Turn the lips as shown in pic.


The steering stops are adjusted by turning the screws (48). Depending on the required steering angle, refer to the following pic:


Dimension X            Steering angle
77 mm                                 35°
63 mm                                 40°
34 mm                                 50°

After adjustment, tighten nut (49).

Install the bearing cones (5) (13) onto their respective pins (7) (11).
Reinstall the swivel housing (47). Position the upper pin (7) to align the housing assembly with the housing (52). Install the pin, ensuring that the lip of the seal (6) is correctly positioned.
Install the cup (4) and shims (3) removed when the cover plate (2) was disassembled. Install and tighten the screws (1) in a uniform and alternate manner.
Install the lower pin (11) smeared with Anti-Seize grease, checking that the lip of the seal (12) is correctly positioned. Install the cup (14) and the cover plate (15). Install and tighten the screws (1) to 115 - 140 Nm. Check that the pins (7) (11) are in contact with the housing.
After fitting the pins, temporarily take out the shims (3). Refit the cover plate (2) and tighten the screws to 115 - 140 Nm. Check or carry out P1 shimming.

Shimming P1 


Use a dial gauge to measure the axial clearance by moving the swivel housing vertically with a lever.
Fill the clearance measured during the previous step with a corresponding thickness of shims (3).
To obtain P1, add extra shims between 0.15 and 0.25 mm thick (0.15 to 0.25 is the preload value).
Remove screws (1) and cover plate (2). Install shims (3) selected previously. Install the cover plate.
Tighten the screws to a torque of 115 - 140 Nm.
Continue the reassembly procedure. Using a grease gun, grease the bearings (13) (14) and (4) (5).
Smear the rim of the seal (45) with Loctite 542 and oil the lips.


Insert the seal using tools ref.:
- 3378058M1
- 3378040M1
- Tool must be screwed home.
- The seal (45) does not install up against the shoulder of the housing; the ring determines its position.
- Smear nut D and its mating face with graphite grease.
The repositioning dimension of the seal (45) in relation to face F is 11.5 mm.


Reinstall the steering ball joint. Tighten the nut to a torque of 115 - 130 Nm. Lock the nut using a new pin.
Reassemble the wheel hub. Reinstall the sun gear (28) and the circlip (29).
Reinstall the planet carrier.

Removing and reinstall the universal joint shaft
Remove the planet carrier.
Take off the circlip (29), the sun gear (28) and extract the steering ball joint.
To remove the swivel housing (47) and the wheel hub (22) assembly.
Remove the universal joint shaft.

Disassembling the universal joint
Hold the external part (1) of the shaft in a vice Installed with soft jaws.
Remove the four circlips (3) from each end of the universal joint.
Using a plastic hammer, drive the central clevis (2) downwards until the bearing sleeve projects from it.
Secure the bearing sleeve in a vice and strike the clevis to drive it out.
Take off the opposite bearing sleeve in the same way and remove the external part of the shaft.
Turn the shaft assembly 90°, then repeat steps to release the universal joint from the shaft.
Secure the inside section of the shaft in a vice.

Reassembling the universal joint
Clean and check the components. Replace the universal joint assembly, including the spiders, seal rings, bearings, sleeves and circlips.


Smear the needle rollers with bearing grease and ensure that they all stay in the sleeves.
Position the universal joint spider (1) in the clevis and push it as far outwards as possible so that the end of the spider acts as a guide to Install the sleeve fitted with the needle rollers.
Drive in the sleeve (1) deep enough into the clevis while holding the spider in order to fit the circlip.
Install the other sleeves and spiders in the same way.

Reinstall the universal joint shaft. Insert a guide through the filler port of the axle housing (52) to align the left-hand side of the shaft with the differential, and make sure it continues to protrude.
Reinstall the swivel housing and wheel hub assembly. Position the upper pin (7) to align the housing assembly with the housing (52). Install the pin, ensuring that the lip of the seal (6) is correctly positioned.
Install the cup (4), shims (3) and cover plate (2). Install and tighten the screws (1) in a uniform and alternate manner to a torque of 115 - 140 Nm.
Install the pin (11) smeared with Anti-Seize grease, checking that the lip of the seal (12) is correctly positioned.
Install the cup (14) and the cover plate (15). Install and tighten the screws (1) to 115 - 140 Nm.
Check that the pins (7) (11) are in contact with the housing.
Using a grease gun, grease the bearings (13) (14) and (4) (5).
Reinstall the steering ball joint. Tighten the nut to a torque of 115 - 130 Nm. Lock the nut using a new pin.
Remove the protective cover placed over the splines of the universal joint shaft. Reinstall the sun gear (28) and the circlip (29). Reinstall the planet carrier.