Piston is pressure tested to test for any leakage at contact surfaces and also between sealing rings.
- For pressure testing of piston, it is to be turned 180°e. foot of piston should be at our neck level.
- Remove lifting bracket from piston rod foot.
FIG.: Removal of lifting bracket
- Fill piston and piston rod with lubricating oil i.e, complete line including telescopic pipe and area under piston crown
FIG.: Filling of lub oil
- Attach Pressure Testing Tool at the foot or base of the piston.
FIG.: Pressure testing tool fitted at piston base
- On the gauge attached to the piston testing tool, you can see the pressure inside the piston
- Now start supplying air at 7 bar to the connection.
- Attach air hose to the air connection nozzle on the pressure testing tool
- Pressure testing tool has connection for air.
- Pressure test the piston at pressure stated in the manual.
- When gauge show the stated pressure(around 7 bar), then stop supplying air.
- Check the contact surfaces of piston and sealing ring at contact surfaces. Wait for at least 30 minutes.
- If there is no leakage for 30 minutes, then everything seems to be fine.
- Release the pressure.
- Remove the pressure testing tool.