Support

While Comet diaphragm and high pressure plunger pumps are covered by warranty on manufacturing defects, there might be a rare occasion where your Comet pump may have issues. Below is a wide range of troubleshooting and maintenance solutions to get your Comet pump up and running. If you are stilling having issues, please give our team a call at 800-864-1649 or send an email via our Contact page.

diaphragm Pump Manuals & Breakdowns

Pressure Regulator Manuals + -
Diaphragm Pump Breakdowns - Low Pressure

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Diaphragm Pump Breakdowns - Medium Pressure + -
Pressure Regulator Breakdowns + -
Diaphragm Torque Specs – Diaphragm Pumps + -

Click the link below to see what torque specifications are needed for your Comet diaphragm pump.

Torque Specs

Diaphragm Failure Chart - Diaphragm Pumps + -

Click the link below to see what issues may cause a diaphragm failure.

Diaphragm Failure Chart

Diaphragm Pump Repair & Maintenance Videos

APS Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing Comet’s APS diaphragm pump series.

Diaphragm Pump Troubleshooting

Comet Plunger Pump Does Not Start + -
  • Air Suction – Check the control inlet device.
  • Closed Lance – Check and open the lance.
Irregular Pressure Vibration For Plunger Pump + -
  • Pump Sucking Air – Check that there is no water leaking as it enters pump.
  • Nozzle Inadequate or Worn – Clean or replace nozzle.
  • Worn or Dirty/Blocked Valves – Replace check valves.
Drop In Pressure With Plunger Pump + -
  • Worn Nozzle – Replace nozzle.
  • Worn or Dirty/Blocked Valves – Replace check valves.
  • Worn Packing – Install new seal kit.
Excessive Noise From Plunger Pump + -
  • Pump Sucking Air – Check that there is no water leaking as it enters pump.
  • Blocked Suction – Inspect filter and inlet supply
  • Water Temperature is Too Hot – Max water temperature must not exceed 145° F
  • Worn or Dirty/Blocked Valves – Replace check valves.
  • Worn Bearings – Replace bearings.
Oil Leak In Plunger Pump + -

Oil Seal Worn – Install new oil seals.

Plunger Pump Manuals & Breakdowns

Axial Pump Manuals + -
Triplex Pump Manuals + -
Axial Pump Breakdowns + -
Triplex Pump Breakdowns - AWD/BWD/EWD + -
Triplex Pump Breakdowns - LW/LWD/LWS
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Triplex Pump Breakdowns - SW/SWS/RW/RWS/TW/TW 500/TWS (Premium)
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Triplex Pump Breakdowns - FW 2/FWS 2/FWD 2/ZWD + -

Plunger Pump Repair & Maintenance Videos

AXD Series Diaphragm Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s AXD high pressure plunger pump series.

RW Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s RW high pressure plunger pump series.

EWD-K Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s EWD-K high pressure plunger pump series.

TW Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s TW high pressure plunger pump series.

FW 2 Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s FW 2 high pressure plunger pump series.

TW 500 Series Plunger Pump Repair & Maintenance + -

Step-by-step instructions on repairing or providing maintenance of Comet’s TW 500 high pressure plunger pump series.

Available Literature

Diaphragm & Industrial Catalogs + -