What pump are you using? Plumbers test pump or a grease gun.

The hydrolastic valve I ordered nine days ago to make a budget hydro pump arrived in my PO Box today. It came from an aviation parts supplier in the USA and was accompanied by no less than 17 pages of documents, although some were just duplicates. They covered certificate of conformance stating the item has been manufactured, calibrated and/or tested to ATC's specification (presumably an aviation requirement), invoice, packing slip, Certificate of Origin for free trade agreement, commercial invoice and export document. The valve itself was in a small box inside a much larger box.

All this for AUD$60 purchase price, including shipping.

Did you get this at trade?

The original pumps have a vacuum pump also to evacuate air from an empty setup I wonder how important this is.
I have seen the master cylinder homespun ones before and work well.

What pump are you using? Plumbers test pump or a grease gun.

There's a cheaper pump available now, and it holds a much more reasonable 8 litres too for 70 dollars https://www.ebay.com.au/itm/8L-High-Pre ... SwlptZ5YI-

Lead content[edit]
To enhance the machinability of brass, lead is often added in concentrations of around 2%. Since lead has a lower melting point than the other constituents of the brass, it tends to migrate towards the grain boundaries in the form of globules as it cools from casting. The pattern the globules form on the surface of the brass increases the available lead surface area which in turn affects the degree of leaching. In addition, cutting operations can smear the lead globules over the surface. These effects can lead to significant lead leaching from brasses of comparatively low lead content.[10]

Silicon is an alternative to lead; however, when silicon is used in a brass alloy, the scrap must never be mixed with leaded brass scrap because of contamination and safety problems.[11]

In October 1999 the California State Attorney General sued 13 key manufacturers and distributors over lead content. In laboratory tests, state researchers found the average brass key, new or old, exceeded the California Proposition 65 limits by an average factor of 19, assuming handling twice a day.[12] In April 2001 manufacturers agreed to reduce lead content to 1.5%, or face a requirement to warn consumers about lead content. Keys plated with other metals are not affected by the settlement, and may continue to use brass alloys with higher percentage of lead content.[13][14]

Also in California, lead-free materials must be used for "each component that comes into contact with the wetted surface of pipes and pipe fittings, plumbing fittings and fixtures." On January 1, 2010, the maximum amount of lead in "lead-free brass" in California was reduced from 4% to 0.25% lead. The common practice of using pipes for electrical grounding is discouraged, as it accelerates lead corrosion.[15][16]