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Annovi Reverberi, The Power of Experience

Industry

Troubleshooting
Problem Probable Cause Solutions
Oil Leak Between Crankcase and Pumping Section
  1. Worn crankcase piston rod seals.
  2. O-rings on plunger retainer worn.
  1. Replace crankcase piston rod seals.
  2. Replace o-rings.
Frequent or Premature Failure Of the Packing
  1. Scored, damaged or worn plunger.
  2. Overpressure to inlet manifold.
  3. Abrasive material in the fluid being pumped.
  4. Excessive pressure and/or temperature of fluid being pumped.
  5. Over pressure of pumps.
  6. Reduce pressure.
  1. Replace plungers.
  2. Reduce inlet pressure.
  3. Install proper filtration on pump inlet plumbing.
  4. Check pressures and fluid inlet temperature; be sure they are within specified range.
  5. Reduce pressure.
  6. Do not run pump without water.
Pump Runs but Produces no Flow Pump is not primed. Flood suction then restart pump.
Pump Fails to Prime Air is trapped inside pump. Disconnect discharge hose from pump. Flood suction hose, restart pump and run pump until all air has been evacuated.
Pump Loses Prime, Chattering Noise, Pressure Thread Fluctuates
  1. Air leak in suction hose or inlet fittings.
  2. Clogged suction strainer.
  1. Remove suction line and inspect it for a loose liner or debris lodged in hose. Avoid all unnecessary bends. Do not kink hose.
  2. Clean strainer.
Low Pressure at Nozzle
  1. Unloader valve is bypassing.
  2. Incorrect or worn nozzle.
  3. Restricted intake.
  1. Make sure unloader is adjusted properly and bypass seat is not leaking.
  2. Make sure nozzle is matched to the flow and pressure of the pump. If the nozzle is worn, replace.
  3. Refer to above priming information.
Pump is noisy Pump sucking air. Check suction manifold.
Pressure Gauge Fluctuates
  1. Valves worn or blocked by foreign bodies.
  2. Packing worn.
  3. Pumped liquid temperature too high.
  1. Clean or replace valves.
  2. Replace packing.
  3. Reduce temperature of pumped liquid.
Over Pressure When Gun is Closed Leaking in unloader valve and incorrect setting. Control the valve and set new pressure level.
Pulsation Faulty pulsation damper. Check pre-charge; if low, recharge it or install a new one.
Low Pressure
  1. Worn nozzle.
  2. Belt slippage.
  3. Air leak in inlet plumbing.
  4. Relief valve stuck, partially plugged or improperly adjusted valve seat worn.
  5. Inlet suction strainer clogged or improperly sized.
  6. Worn Packing. Abrasives in pumped in cavitation. Inadequate water.
  7. Fouled or dirty inlet or discharge valves.
  8. Worn inlet, discharge valve blocked or dirty.
  9. Leak in the discharge line.
  1. Replace with nozzle of proper size.
  2. Tighten or replace with correct belt.
  3. Disassemble, reseal and reassemble.
  4. Clean and adjust relief valve; check for worn or dirty valve seats. Kit available.
  5. Clean. Use adequate size. Check more frequently.
  6. Install proper filter. Suction at inlet manifold must be limited to lifting less than 20 feet of water or 8.5 psi vacuum.
  7. Clean inlet and discharge valve assemblies.
  8. Replace worn valves, valve seats and/or discharge hose.
  9. Repair leak.
Pump Runs Extremely Rough, Pressure Very Low
  1. Restricted inlet or air entering the inlet plumbing. Proper size inlet plumbing;
  2. Inlet restrictions and/or air leaks. Stuck inlet or discharge valve. Replace worn cup or cups.
  1. Check for air tight seal.
  2. Clean out foreign material. Replace worn valves.
Water Leakage From Under Manifold. Slight Leakage Worn packing. Install new packing.
Oil Leaking in the Area of Crankshaft
  1. Worn crankshaft seal or improperly installed oil seal o-ring.
  2. Bad bearing.
  1. Remove oil seal retainer and replace damaged o-ring and/or seals.
  2. Replace bearing.
Excessive Play in the End of the Crankshaft Pulley Worn main bearing from excessive tension on drive belt. Replace crankcase bearing and/or tension drive belt.
Water in Crankcase
  1. Humid air condensing into water inside the crankcase.
  2. Worn packing and/or piston rod sleeve, o-rings on plunger retainer worn. Replace packing.
  1. Change oil intervals. Use any high grade automotive 30 weight non- detergent oil.
  2. Replace o-rings.
Oil Leaking from Underside of Crankcase Worn crankcase piston rod seals. Replace seals.
Oil Leaking at the Rear Portion of the Crankcase Worn crankcase piston rod seals. Replace seals.
Loud Knocking Noise in Pump
  1. Pulley loose on crankshaft.
  2. Broken or worn bearing.
  1. Check key and tighten set screw.
  2. Replace bearing.

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