NC-TR4

MKTR - Thanks for response and input , I did see that discussion thread, does not really answer my questions unfortunately. Think they must be original Armstrong type as what looks like a filler plug near the top of the body lid cover plate is evident. I believe the Armstrong Lever Arm fluid is 10 W. Some people are saying 10 W fluid is not quite viscous enough and you could be better to go for 30 W motorbike fork oil.? Still not sure if you can check the fill level of the damper whilst it is installed on the car, the Triumph workshop manual just mentions checking it at the 12000 mil

Te TR4 Workshop manual is not very specific about how to check the fluid level in the damper. Presumably with the car jacked. and the axles hanging fully down you just remove the filler plug and top up to top of plug hole ? Grateful if somebody could outline the fluid level check procedure and confirm the task can be performed with damper installed on the car ? The Armstrong suspension fluid that is referred to - is this still obtainable , what is the spec and are there equivalent products that can be used.? Thanks in advance for any information.