Thought this opportune to post at this time. David S has made mention of a much neglected component on a D, the headlight damper (http://www.aussiefrogs.com/forum/ci...d-special-headlight-assembly.html#post1230858). I'm just in the process of bringing mine back to life and was intrigued to learn that the damper is hydraulic and should contain LHM, the only hydraulic component that is not connected to the main system.
Having never had one apart I'd always assumed it to have a solid rubber, when actually it is a very clever device with a moving piston and an orifice between two cavities for the LHM to pass from one side to the other. The hole /orifice is larger on one side than the other which I guess is designed to assist with damping as the LHM is forced through and returns?
From what I understand there are two variations an 'H' as is mine and a 'V'. I've also been told that some were plastic, mine is alloy.
This is the unit removed from the car after pulling it apart and cleaning, the two rubber diaphragms are completely shot and have probably been that way since I've owned the car. The build up of muck meant the piston possibly hadn't moved in 20 years.
The components after dis-assembly, the outer rings just push off, undo the nuts, release the diaphragms and withdraw the piston.
The centre hole is where the piston fits, as mentioned one side has a large hole between cavities, the other a small.
I didn't take note when pulling things apart but I presume the large hole will face to the front of the car where the connecting rod will attach - anyone confirm?
I've ordered replacement diaphragms and note that these are the same as used on height correctors.
Truly amazing cars, another learning curve for me :wink2:
Cheers
Chris
Having never had one apart I'd always assumed it to have a solid rubber, when actually it is a very clever device with a moving piston and an orifice between two cavities for the LHM to pass from one side to the other. The hole /orifice is larger on one side than the other which I guess is designed to assist with damping as the LHM is forced through and returns?
From what I understand there are two variations an 'H' as is mine and a 'V'. I've also been told that some were plastic, mine is alloy.
David S said:If the damping device is untouched original, it may need repair, which involves cleaning and replacing two rubber diaphragms, same as used in a height corrector.
This is the unit removed from the car after pulling it apart and cleaning, the two rubber diaphragms are completely shot and have probably been that way since I've owned the car. The build up of muck meant the piston possibly hadn't moved in 20 years.
The components after dis-assembly, the outer rings just push off, undo the nuts, release the diaphragms and withdraw the piston.
The centre hole is where the piston fits, as mentioned one side has a large hole between cavities, the other a small.
I didn't take note when pulling things apart but I presume the large hole will face to the front of the car where the connecting rod will attach - anyone confirm?
I've ordered replacement diaphragms and note that these are the same as used on height correctors.
Truly amazing cars, another learning curve for me :wink2:
Cheers
Chris