Instruction Manual

Difficulty Probable Cause Remedy

Delivery Higher

Than Rated 1. Suction pressure higher than Install back pressure valve or consult factory

discharge pressure for piping recommendations

2. Suction piping too small Increase pipe size -- Install PULSAtrol pulsation

dampener at pump in suction line

3. Back pressure valvae set too low Increase setting

4. Back pressure valve leaks Repair, clean, or replace

Pump Loses Oil 1. Diaphragm ruptured Replace

2. Leaky oil seal Replace

3. Cover gasket leaks Replace or tighten

4. Pump head gasket leaks Replace -- tighten pump head bolts. Seal with

permatex.

5. Gear box overfilled Remove excess oil

Air Continuously 1. Oil in reservoir low Refill to correct level

Bleeds From 2. Hydraulic Bypass valve opening Refer to "Hydraulic Bypass Valve"

Automated Air Bleed continuously

Valve 3. Suction pressure too low Increase pressure

4. Breakdown of oil, temperature high Change oil type, consult factory

Noisy Gearing,

Knocking 1. Discharge pressure too high Reduce pressure or discharge pipe size

2. Water hammer Install PULSAtrol

3. Worn bearings Replace

4. Worn gears Replace gears & check for improper hydraulic

bypass valve setting

5. End play in worm shaft Consult factory

6. Eccentric or worm gear Tighten or replace assembly

7. Bypass valve set too high Readjust (see "Hydraulic Bypass Valve")

Piping Noisy

1. Pipe size too small Increase size of piping, install PULSAtrol

2. Pipe runs too long Install PULSAtrol in line

3. Surge chambers full of liquid Recharge with air or inert gas, replace diaphragm

and recharge

4. No surge chambers used Install PULSAtrols -- pulsation dampeners

Motor Overheats

1. Pump overloaded Check operating conditions against pump design

2. Oil too viscous Consult factory

3. Low voltage Check power supply

4. Loose wire Trace and correct. Check no load amps