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Binks > 81883X 1/2" Diaphragm Pumps Troubleshooting
81883X 1/2" Diaphragm Pumps Troubleshooting
Symptom1 - Product discharged from air exhaust.
Remedy
- Check for diaphragm rupture.
- Check tightness of diaphragm nut or bolt.
Symptom2 - Air Bubbles in product discharge.
Remedy
- Check connections of suction plumbing. Check band clamps on intake manifold (non-metallic models).
- Check “O” rings between intake manifold and fluid caps.
- Check tightness of diaphragm nut or bolt.
Symptom3 - Pump blows air out main exhaust when stalled on either stroke.
Remedy
- Check “U” cups on spool in major valve.
- Check valve plate and insert for wear.
- Check sleeve and “O” ring on diaphragm connecting rod.
- Check “O” rings on pilot rod for wear.
Symptom4 - Low output volume.
Remedy
- Check air supply.
- Check for plugged outlet hose.
- For the pump to prime itself, it must be mounted in the vertical position so that the balls will check by gravity.
- Check for pump cavitation - suction pipe should be 1/2" minimum or larger if high viscosity fluids are being pumped. Suction hose must be non-collapsible type, capable of pulling a high vacuum.
- Check all joints on intake manifolds and suction connections. These must be airtight.
- Check for sticking or improperly seating check valves.
- If pump cycles at a high rate or runs erratically, check piston “O” rings for wear.
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