Malfunctions

Lack of pressure in the air chamber

That the suction filter is not clogged. Clean if necessary.
The seal between the cylinder and the air chamber. Tighten. Replace the air chamber if necessary.
The condition of the piston seal. Lubricate or replace if damaged.

Leak from the piston

The condition of the piston seal. Lubricate or replace if damaged.

Liquid escapes through the nozzle without the switch being pressed

That the handle switch is not blocked. Operate, release. Replace the handle if the switch is blocked.

The air chamber is pressurized, but the liquid won�t come out when the switch is pressed

That the circuit is not blocked in the handle filter or nozzle. Clean.
That the hosing is not bent at the tank outlet.

The piston is broken

That the lever is mounted correctly in relation to the pumping position. Replace the piston