6.5.3. Check of details before assembly

Before assembly wash out all details isopropyl alcohol, dry up a stream of compressed air or wipe with a pure rag, without allowing their contact with mineral oils, kerosene, or diesel fuel which can damage a sealant.
The mirror of the cylinder and the working surface of pistons have to be absolutely pure, without rust, рисок and other defects.
At each dismantling of the cylinder replace sealing rings new even if they in good shape.
Check elasticity of a spring of the piston which length has to be: under load of 34,3-41 N (3,5–4,2 kgfs) – 36 mm, under load of 62,3-72 N (6,35–7,35 kgfs) – 21 mm, in a free state – 57,5 mm.