Silver Shadow 1 height control
First of all 'hi', I'm new here. Second, thanks for any help, and sorry for the length of the post.
I'm making fair progress with the hydraulic systems on my 1969 RR Silver Shadow 1. The brakes now work, which is an improvement, so I'm trying to fix the rear height control suspension. The front doesn't work either, as it has been disabled, but that's for another day.
The situation is that the rear height control has never worked. The car seems to be resting on it's 'normal' suspension. The offside ram would bleed (opening the bleed valve sent a jet of hydraulic fluid squirting out, this would grow in intensity if someone pushed down on the back of the car, and reduce if someone lifted it) but the nearside would not. I determined there was feed to the nearside valve (loosening the appropriate pipe fitting would cause fluid to leak) but none at the ram. The actuating rod seemed to be about right. Because of this I decided to change that heigh control valve, which I have now done. Most of the pipes/hoses looked pretty grotty, so a lot of those were renewed too.
The situation now is that:
The accumulators bleed and hold pressure (the 'front' one is new). Brake pump test requires 50+ pumps to get either light on, a pressure valve connected to the feed for the front height control valve jumps to 500 when the engine is started, and climbs to 1,500 over about 20 seconds. At that point the pressure gauge unions began to leak. Switching off the engine shows the valve hold at 1,500psi, for at least a few minuites.
All brake bleed points bleed.
No suspension bleed valves admit any fluid during the normal bleeding routine, and there is no feed to the height control rams (disconnecting the pipes to the rams does not result in a boot full of hydraulic fluid)
There appears to be feed to all height control valves (again, fluid seems to be present at quite high pressure at the inlet ports)
I have tried disconnecting the control rod from the 'new' valve and actuating it manually, with the bleed open, and the engine running. Nothing happens.
I have blanked off the feed to the front and offside-rear height control rams, isolating the nearside rear.
I assume then that my solenoid valve is faulty, there being nothing else that would stop both a working, isolated, rear height control valve. Is this a safe assumption? Does a faulty solenoid valve stop the height control valve working? My next couse of action will be to test the input/output of the solenoid valve.
I would welcome any other comments/guidance though!
Thanks in advance.