Mike ,
I'm a little surprised that someone has not replied earlier to your post.
My thoughts and experience on the one shot system are ..
1.
The overall design is floored as the oil will leak externally at the point which has the greatest clearance . With the suspension lubrication, if the top pin has excessive clearance the king pin bushes and lower pin often are completely dry
and wear quickly.
If the clearances are correct ,the theory is that the oil SHOULD pass from the top pin into the centre of the king pin lubricating both king pin bushes, down to the bottom spring bracket , through that bracket and into the bottom pin . But in practice it is doomed for failure. I have never seen this system working correctly long term.
I recommend that you fit grease nipples to the the top pins and made new lower pins to use a grease nipple . I also fit a grease nipple in the stub axle between the two king pin bushes . I did this to my 400 over 35 years ago and have covered well over 120,000 miles . It has always been well packed with grease there is no noticeable wear and moisture cannot enter.
2. The lubrication of the steering rack and pinion is a separate issue .
When I restored my 400 I fitted a brand new rack& pinion assembly and lubricated with grease nipples . The steering was always a little firm compared to well worn 400s using oil . I converted the rack & pinion back to oil lubrication and it has freed up quite a bit.
The oil enters the rack housing at the pinion bush and on top of the rack and feeds into the centre of the rack through to the tie tubes to lubricate the steering joints/ball on both ends of the tie tube .If this is working correctly there should be oil leaking from the steering arm ball joint on each side lubricating the brake backing plate , wheel and garage floor.
Any excess oil around the outside of the rack leaks into the rubber rack bellows, so that is usual .
I also fit a grease nipple into the tie tubes to positively lubricate both ball joints . But this does push more excess oil from the rack into the bellows.
The rack and pinion does not need constant oiling just an occasional press of the Enots pedal.
3. The Enots oiling system still only works if the distribution block is working correctly . That has its problems as well.
4. The locknut on the inner ball joint has to be loosened to remove the tie tube .
I would certainly not consider oil lubrication to the suspension in favour of grease.
There will no doubt be others who want to keep their cars totally original that will disagree.
Geoff
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