Fluid flowing from the exhaust outlet

Check the diaphragm for any damage.
Check the diaphragm screw for looseness

Fluid flowing from the exhaust outlet

Check the diaphragm for any damage.
Check the diaphragm screw for looseness

Air bubbles in the outlet fluid

Check the suction pipe connection for good sealing.
Check the connection between the suction pipe and the intake manifold for good sealing.
Check the O ring between the intake manifold and the fluid cap
Check the diaphragm screws for looseness

Low pump output

Check the air supply is stable.
Check the inlet/outlet for any blockage.
Check connectors connecting the intake manifold for air tightness
Check that the ball is not stuck to the seat or the ball is not improperly seated

Air flows from the side gap of the muffler cover when there is no reciprocating movement

Check seal ring on slid valve
Check seal ring on trigger rod
Check seal ring on diaphragm link rod