Wastewater Diaphragm Liquid Pump / Self Priming Membrane Water Pump

Disassembly of the Parts in Fluid Section

  a)First, remove the pump from the pipeline system and drain   off the materials from the pump inside.   b)Place the pump in a clean work environment.   c)Dismantle the outlet pipe (1) from the pump first, and then   take out the ball (2), O cup (3) and (47) and ball seat (4)   from the upper end of the fluid cap (5) in sequence. After   that, place the pump upside down and dismantle the inlet   pipe (11) so as to take out O cup (3) and (47), ball seat (4)   and ball (2) from the fluid cap (5).   d)Release the bolts around the two fluid caps to disassemble   the cap (5).   e)Release the diaphragm screw (10) and remove diaphragm   washer (7), (8) and diaphragm (6) from the both ends.   Remove the diaphragm rod (23) and the lip-shape seal   ring (25) can be replaced.   Disassembly of Parts for Air Valve   f)Loosen the bolt (39) first, and then dismantle the air valve   casing (38), air baffle (42) and sealing gasket (40), and   (41).   g) Take out the valve slice (36) and valve plate (37) from the   air valve casing (38).   h) Dismantle the circlip (29) and take out the limit end cap   (31) from both ends of the air valve casing (38), and you   can replace the cup (30) as needed.   i)You can check the lip-type packing (33) after pushing out   the spool (35) from the air valve casing (38) with the   hands.   Disassembly of Parts for Pilot Valve   j) Loosen 4 bolts (16) fixing the cylinder head first, and then   dismantle the cylinder head (14) and (18) on both ends and   remove the O cup (17).   k) Remove the sealing gasket (19) from the groove of the   motor casing (15).   l) Eject the pilot rod (22) and trigger rod (45) from the motor   casing (15) and you can replace the lip-type packing (20)   on the trigger rod or the O cup (44) on the pilot rod.   Reassembly of Diaphragm Pump   The reassembly steps of the pump are incompatible with   those of disassembly, so you are kindly asked to pay   attention to the following in the reassembly process:   1) All the sealing elements, as well as their contact parts,   must be greased.   2) Please check carefully prior to the use of all sealing   elements whether they are damaged, such as surface   damage. If damaged, please replace the new ones.   3) The lip direction of the lip-type packing (20)(, 25) and   (33) should be consistent with the direction shown in the   chart.   4) The bolts on the fluid cap should alternately be fastened   by opposite angles to achieve a better sealing result.      Troubleshooting   1. Some fluid is drained from the exhaust opening along   with the air flow.   Check the diaphragm for any damage.   Check the diaphragm screw for looseness   2. There are 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   3. 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.   4. Air is discharged from the exhaust opening when there   is no reciprocating movement.   Check seal ring (33) on slid valve (35).   Check seal ring (20) on trigger rod (45).   Check seal ring (25) on diaphragm link rod