The main pressure filter showing the lid, pressure relief valve, and conversion plates for a paper element insert. It is important that the top and bottom plates form an oil-tight seal with the paper element and that the upper disc seals against the protruding tube in the base of the lid.
Paper element references used to date are :-
Westland 403
Fram CH801PL
Cooper GP172
Complete unit. Points of note are :-
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The drain plug - useful when changing the oil. This one had been badly burred and had to be filed down to the next available size.
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The clamping nuts around the lid are 1BA
I had replaced the bushes some time ago so all that was needed was to clean the commutator and a quick polish. It is worth coating the lid mating surfaces with Copperslip, or similar compound, to stop corrosion jamming the parts together.