Mr. Moulton patent from inside
60k km 'young' rear hydragas unit RPJ100020, worn because of manufacturing or design failure at Dunlop ??
Notice: the front unit is different inside with a weaker design valve block. See comparison of displacers

new purchased unitbottom lookreleased dust cover

blown one with bubblebubbleworn mesh

Fluid sphere (bottom)

cut around the pressed bodyopening (right = bottom)hydrafluid diaphragma (thin seal diaphragma with FOLDSaturned round body, lower part, cutted ringcorrect view
pealed off seal diaphragma, with hole at a fold endWORN because of poorly covered steal meshsee the steel mesh :((

valve area in the middle of the body, still to investigatevalve block ... shouldn't the fluid content a rust protection component???

piston hole for the knuckles shaftalloy piston ends like a studpiston stud seat for the piston stud in lower diaphragmapiston stud clamp in lower diaphragma

Nitrogen sphere (Top)

cut along the upper bodyopening the upper nitrogen bodyview on the netrogen side of the valve areawaterside of the nitrogen sphere pealing of the nitrogen diaphragma from the upper capno surprisefilling hole closed by a steal rivetthe rivet (drilled from the othe side for N2 release press ring also in upper diaphragmaview on the nitrogen side of the valve area

all the partsagainagain

found parts from left to right:

        1. dust cover (rubber)
        2. piston, aluminum alloy (press stud to the diaphragma !!)
        3. lower cap (mild steal pressed hose)
        4. seal rubber diaphragma (thin rubber attached to armed diaphragma)
        5. press ring (forms thin rubber diaphragma)
        6. steal mesh armed diaphragma (What a crap quality !!!) :(
        7. body with valves (to investigate)
        8. upper diaphragma (simple rubber)
        9. press ring (forms upper diaphragma)
        10. upper cap

        weld line cutsurprise

        valve block

        Cut around the weld line, the non-return valve system of MGF rear or Metro rear displacer. Again, very rusty steel parts.

        valve block nitrogen sideNitrogen sphere side non-return valveone valve, spring slipped a little bit to the right hand side

        valve block fluid sidefluid sphere side (in the center is located a long rivet)

        valves in block
        4 valves for back flow
        1.0/1.1 weak spring, large diameter
        2.0/2.1 strong spring small diameter
        2 valves for fluid flow to the nitrogen pressure sphere
        3.0/3.1 equal spring and diameter as No 2.0/2.1

        Drawings of the spring and valve system follow. First impression:
        There are for each non return and damp accessing holes in the block. Closed by metal leave springs. The upper bended spring is surely weaker than the lower single leave. Springs have both functions. The damping of flow and transport of force to keep the holes closed.

        The valve block is sealed at its outer diameter by a O-Ring against the upper and lower sphere cap.

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