axle bearing tube drift
front and rear axle tools. Different tools are needed for the rear axle when the rear wings are still on the vehicle. Please see below.
To fit the inner bearing races into position on the front axles
If needed, it can be used on the outer bearings.
This tube drift will work on the front axle with the car body and wings still on.
It is 150mm long and cannot mount the rear axle bearings if the wings are still on.
It will only work on the rear axle when the body or wings or axle are removed from the vehicle.
See below for another tube tool set up to be able to fit the bearings with these items still attached to the vehicle.
Mounting the rear axle bearings with the car body or wings still on the chassis
There is limited room to be able to mount the rear bearings. The 150mm long tube will not fit, so a shorter tube is needed. The inner bearing is drifted on, like the front ones, but is then pressed further on to its final position.
Tools needed for the inner bearing mounting on the rear axle with the body or wings still on the car. The outer bearing can be mounted with the 70mm long tube drift.
Tube 92mm long, tube 70mm long, spacer 7mm wide, 16 slot ring nut socket, spanner or socket and torque wrench, hammer, ring nut, 6 inch rule.
All of these tools can be hired only.
Firstly, mount the oil seal. It must be this way around. Note the outer taper, this helps to guide the axle arm on and into position.
This tube is 70mm long and mounts the inner bearing onto the outer bearing landing as a tube drift.
The bearing can then be pushed up by hand to the inner bearing landing.
When the bearing is at its landing, mount the 92mm long tube and the ring nut. Tighten the ring nut and it will push the bearing further on by 6mm
The bearing must move 12.5mm to its final landing position. It has already moved 6mm.
Remove the ring nut and mount the 7mm wide spacer, then put the ring nut on again. Tighten the ring nut and move the bearing to it final position
Everything is mounted for the final push
The bearing is at its final position. Support the arm as it sits on the bearing and oil seal and then fit the outer bearing.
Supporting the arm prevents any damage to the oil seal outer periphery.
When the axle arm is in position with the outer bearing mounted, the final tightening of the ring nut is needed.
Please use the following method to achieve the best results.
Tighten the ring nut fully and then lift and lower the arm several times. There should be no roughness or abrasion whilst lifting and lowering the arm.
This motion will seat the taper rollers into their correct places.
Re-tighten the ring nut and swing the arm again.
Slacken the ring nut slightly. Torque the ring nut to 36 ft/lbs. Fit the small split pin, inwards to outwards. Do NOT slacken the ring nut to get the split pin in.
There are 3 holes available for the split pin, always tighten further to put it in. Check for any roughness or binding, this must be eliminated.
Citroen changed the axle bearing sizes 2 times on 425 models. Although all axle bearings, on all models, had the same outside and inside diameters, both front and rear, Citroen successively changed the front and rear axle bearing width 2 times on cars and vans. The depth of the taper roller cone fitment in the arms was remachined. although the bearings remained the same size. [except for their width]
The original left hand front arm [A-412-1] and the right hand front arm[ A-412-1a] both had the bearing housings at 42.4mm [inside] and 28.5mm [outside] deep.
The newer left hand front arm [A-412-1b] and the right hand front [A-412-1c] now have housing depths of 39.4mm and 25.5mm deep. A 3mm difference at each end. New arms are fitted with bearings SKF 620.041 or TIMKEN 620.042 dimensions 63.5 x 95.0 x 17. All bearings are now supplied at 17mm wide.
On an old type arm, the new bearings can be fitted, if 2 spacers, 3mm thick, are positioned between the housing bases and the cups at each end.
Taper roller parts from different makers must never be interchanged, as their angles are different.
One old type and one new type bearing can be fitted on an old arm.[1 spacer required] These spacers are available from this site
If an old arm is replaced by a new one, then both bearing sets must be renewed.
2 different makes of bearing can be fitted on the same arm.
These details also apply to the rear axles and the following vehicles. A type saloons, van type AU, AZ saloons and AZU vans.