Attention! The time for washing the sealing rings in isopropyl alcohol is no more than 20 seconds, followed by blowing with compressed air.
The cylinder mirror and the working surface of the pistons must be completely clean without rust, scratches or other defects. An increased gap between the cylinder and the pistons is unacceptable.
Each time you disassemble the cylinder, replace the seals with new ones, even if they appear to be in good condition.
Check the elasticity of the piston spring, the length of which should be: under a load of 35+7 N (3.5+0.7 kgf) – 36 mm, under a load of 63.5+10 N (6.35+1.0 kgf) – 21 mm, in a free state – 57.5 mm.