AUSTIN SEVEN SUSPENSION
A DA7C TECHNICAL FORUM REPORT
By Phil Whitter
Foreword statement: Suspension, steering and brakes are all interconnected and one cannot operate efficiently without the others being in good condition.
(For advanced suspension modifications click here)
Front Spring
Check for loose U bolts
Spring mounting can affect castor angle
Wrong castor angle can affect steering
Lubricating springs:
Lubricate springs with spray grease
Brush oil on when spring leaves open (weight off springs)
Clean thoroughly before oiling
Protect springs with Denso grease tape or Wefco leather gaiters
Someone uses big heatshrink!!
If you lubricate springs can it affect spring rate?
Keep shackles lubricated
Lot of worn shackles—Tony Betts does shackle recon kit and Seven Workshop do new shackles
Watch radiator drain tube does not discharge onto spring
New springs from Ian Dunford and Fenix at Tiverton
Front Shock Absorber
Make sure centre bush is good
Modern star washers can be weak
Old wood discs swell in wet
Have seen grease used on old wood discs
Do not over-tighten – just enough to damp rebound
Install axle right way round with tapered pin eye to the front!!
Modifications to front shock absorber :
1) Take link off one side, cut in half, fettle and bolt back on
2) Fit a twin-mounting plate kit (see A7CA mag.)
Rear Springs
For removal use Porta Power or soak overnight with a lot of persuasion
Refit with spring packing if necessary (on the bottom?)
Beware spring camber settings in A7 Companion are wrong—see the club’s website for correct settings.
If spring bushes are loose, close eye or make new bushes
Use washers to stop side play on spring pins
Spring pins difficult to remove on early cars—use a puller made by Willie McKenzie
Don’t forget to remove cotters first.
Cotters push out to the front (viewed from back nut facing you)
Rear Shock Absorbers
Watch out for cracked chassis flange
Make sure brass discs are in place
Check rubber in links for play or perishing
Nobby spring assisters (Willie does them) need big fixing plate in floor
Nobby good on SWB cars
Watch out for different lengths on Ruby alloy links.
Tyre Pressures
Several options are used by members:
22 all round
22 F 24R
22F 26R
Take your pick which works best for you!