There are four variations of Aprilia front suspension, this is the early 1st.
If you look at the changes section you’ll see when the updates happen.
Clive’s book has an excellent section on Aurelia front suspension which is very similar to the Aprilia.
As fitted just after the car arrived from the UK.
My collection of home made tools.
Note the grease nipple for the bottom spring section, this should be an oil filler.
Don’t try this at home. The 2 metre 2” steel water pipe is not in the pic, but is essential to remove the bottom.
Lower spring and parts.
p/n 48703.The thrust bearings had been running dry and were stuffed. New set from Cavalitto.
Starting at the top.
Rebound springs. Very important to reassemble in the same order.
Complete suspension unit. The only problems were the thrust bearings and the hard chrome on one base plug.
38-604, 38-73052. Make sure the little flap valve is there and working
My favourite pass time, finding the Lancia date stamp, 1937 so original for my car.
All painted and ready to be reassembled.
Back together again.
New brake linings and overhauled wheel cylinders, done by BGT.
Ready to go.
New oil nipple. Make sure they both face to the front, or they will get damaged when turning.
Oil syringe. I use a mono grade 30W engine oil for the top and any heavy 50 weight oil for the bottom section.
By 2011 I had a persistent leak from the bottom of the front right suspension. Spotted this “crack”
The centre section is held in place with a wire clip then soft soldered at manufacture. In the end an easy fix.
2012. Front left hand suspension.
The top bush had worn +50 thou oval.
Top sleeve showing the wear on top bush, new bearing collar inside.
L - R. Bearing Collar 38-73070, Top Bush 38-73049, Top Sleeve 38-73041
The top bush can be tapped out with a brass drift.
New parts. My local engineering co. made them ($350!) Had to be case hardened and precision ground.
Time will tell how the new part performs.