Steering box - oil

[colinw]

I would like to change the gearbox oil on the steering box on my 1800 Flavia Coupe but as yet the drain plug? has not revealed itself.  Sorry to ask such a basic question but can anyone help? Thank you

[Angle Grinder]

You'll need a big syringe and a bit of tubing to suck it out, but I suspect most unrestored Flavia steering boxes have seals that let the oil seep out. I use a Penrite product that has a viscosity somewhere between oil and grease. If you warm it up it will pour into the steering box and then it "sets" with a viscosity that prevents it leaking out past old seals.

[colinw]

Thank you for the reply. As I suspected and you confirmed one would have to remove a flange and seal to drain the box. Interesting idea about using a thicker oil. Can you let me know the viscosity?
Syringe idea is interesting I shall give it  try. Have cleaned up the box and now I look for the potential leaks.
Thank you again

[lancialulu]

Thank you for the reply. As I suspected and you confirmed one would have to remove a flange and seal to drain the box. Interesting idea about using a thicker oil. Can you let me know the viscosity?
Syringe idea is interesting I shall give it  try. Have cleaned up the box and now I look for the potential leaks.
Thank you again

I use EP140

[Angle Grinder]

I think it was this product, but I'd need to have a look in the garage to check what bottle I've got.  https://www.penriteoil.com.au/products/steering-box-lube

[JohnMillham]

I think it was this product, but I'd need to have a look in the garage to check what bottle I've got.  https://www.penriteoil.com.au/products/steering-box-lube

That's what I have used for years in the Lambda and Augusta. They used to leak, but don't any more.

[colinw]

Many thanks to all of you and the recommendations, I shall follow it through and hopefully another part of my Coupe shall become leak free.