Troubleshooting FAQ Manuals Wiring Diagrams Air Tool Guide




Open Troubleshooting PDF

Problem: Possible Causes: Solutions:
Breaker Trips
  1. Low Voltage Supply
  2. Motor Overload Tripped
  3. Restricted Air Passages
  4. Loose Wires at Contact Point
  5. Locked up Pump
  1. Check that the incoming power supply line is the correct size for your voltage rating.
  2. Check that your compressor is on a dedicated circuit.
  3. Check that all wire connections are secure.
  4. Inspect transfer tubes and check valves.
  5. Adjust belt tension.
Compressor Stalls
  1. Low Voltage Supply
  2. Loose Compressor V-Belts
  3. Check Valve Malfunction
  4. Siezed Compressor Pump
  1. Check that the incoming power supply line is the correct size for your voltage rating.
  2. Adjust V-Belt tension.
  3. Inspect check valve for proper operation.
  4. Check compressor pump oil level.
Low Discharge Pressure
  1. Air Leaks in Air Lines
  2. Leaking Valves
  3. Restricted Air Intake
  4. Blown Gaskets or Seals
  5. Worn Cylinder or Piston Rings
  1. Tighten or replace leaking fittings.
  2. Inspect air lines and pipes in shop.
  3. Clean and/or replace air filter element.
  4. Inspect/Replace Compressor Gaskets/Seals.
  5. Inspect/Replace Piston Rings.
Compressor Pump Knocking
  1. Loose Motor Pulley or Flywheel
  2. Low Oil Level in Pump
  3. Carbon Build-up on Valves/Pistons
  1. Inspect/Tighten pulley and flywheel.
  2. Check/Add compressor oil.
  3. Inspect, clean and/or replace valves and pistons.
Excessive Oil Discharge in Air
  1. Restricted Air Intake
  2. High Oil Level in Pump
  3. Excessive Duty Cycle of Pump
  4. Worn Cylinder or Piston Rings
  1. Clean/Replace air filter element.
  2. Check/Remove excessive compressor oil.
  3. Reduce compressor duty cycle.
  4. Replace piston rings or cylinder as necessary.
Compressor Overheating
  1. Poor Ventilation
  2. Dirty Cooling Surfaces on Pump
  3. Excessive Duty Cycle of Pump
  1. Relocate compressor to an area with better ventilation (not closer than 18 inches from nearest wall.
  2. Clean all cooling areas of pump.
  3. Reduce compressor duty cycle.
Excessive Belt Wear
  1. Pulley Out of Alignment
  2. Improper Belt Tension
  3. Pulley Damaged or Loose
  1. Realign pulley with flywheel.
  2. Adjust belt tension.
  3. Inspect/Replace pulley.
Compressor Motor Hums or Won't Start
  1. Fuse or Breaker Blown in Main Panel
  2. Low Voltage to Compressor
  3. Pump Starting with Head Pressure
  4. Power Leads in Motor or Starter Loose
  5. Starter or Pressure Switch Contacts Corroded or Broken
  1. Reset breaker or replace blown fuse.
  2. Check for proper voltage to the compressor.
  3. Inspect check valves and unloaders for proper operation.
  4. Check all power leads for a solid connection.
  5. Repair/Replace starter and/or pressure switch.
Compressor Has Power, Will Not Start
  1. Starter Tripped
  2. Starter Coil Has Gone Out
  3. Pressure Switch Closed
  4. Motor or Pump Locked Up
  1. Reset starter.
  2. Check/Replace starter.
  3. Check/Replace pressure switch.
  4. Repair/Replace damaged motor or pump.


Open FAQ as PDF

How often should I change my LP Compressor's oil? LP Compressor's come standard with "break-in" oil designed for the first 50 hours. Accurate oil change intervals should be determined by a fluid sampling report and directed by the analysis. A rough guideline for most LP Compressors is to change the oil every 3 months.
When should I replace the Air Intake Filter? The Air Intake Filter should be cleaned on a semi-daily basis. When the filter accumulates debris that does not come out during cleaning, or develops tears or holes, the filter should be replaced.
What is the difference between stop-start and constant run? Simply put, a start-stop air compressor has a pressure switch that turns the machine on and off. Most samll electric and gasoline air compressors are start-stop.
A constant run compressor means the motor continuously runs and continuously turns the pump. Industrial shops who need constant air, on a daily basis, will need to purchase one of our constant run compressors.
What voltage should I run my LP Compressor on? It depends on the size of the compressor and what your compressor has been designed for. Most larger models run on Single Phase 208-230 or 3 Phase 208-230/460.
Will my LP Compressor run on a generator? It is not recommended to use a generator to power any compressor. Generators have fluctuations in power and compressors require constant voltage to be able to run.
What happens if water is left in my LP Compressor tank? Compressor tanks are made of steel and rust will start to occur if water is left in the tank. It is best to drain your tank with the drain valve daily to eliminate this problem.
What size hoses should I use with my LP Compressor? This will depend on the type of LP Compressor you have. The two most commonly used sizes are 1/4" and 3/4" hose. Check your compressor's maual or discharge port.
What is the maximum length hose I should use with my LP Compressor? This will depend on the size of your compressor and the CFM required. Generally, for a small portable unit, 150' is the maximum. For an Industrial Series compressor that length can be much greater.
How much air will I need to power my air compressor tools? Please see the LP Air Tool CFM Guide for a list of tools and their respective CFM requirements.
How often should I service my LP Compressor? This depends on how often you run your compressor. If you are only running it occassionally then annual service should be fine. If you use your compressor daily then quarterly maintenance is suggested.
My compressor stores air at a high pressure, yet my tools require a low pressure, what should I do? This is a common problem, but luckily there is an easy fix. To provide the required pressure to your tools, add a pressure regulator to your line. Pressure regulators can be set for any desired pressure, giving you the correct air pressure when the air reaches your tool.


Industrial Commercial Portable Electric Tank Mount Single Stage Pumps Two Stage Pumps

Wiring Diagrams

Commercial Industrial
3 HP Single Phase
4-5 HP Single Phase
Single Phase
Three Phase

Electrical Check (Express)
Electrical Check (Extensive)


Open CFM Guide as PDF

For continuous use, multiply "Average CFM x 4" to get a continuous CFM rating for the tool.

Air Tool Average CFM @ 90 PSI
Air Reciprocating Saw 7
Angle Disc Grinder (7") 5-8
Angle Polisher 8
Brad Nailer 0.3
Buffer 13
Chisel/Hammer 3-11
Cut-Off Tool 4-10
Drill 3-6
Dual Sander 11-13
Framing Nailer 2.2
Grease Gun 4
Hydraulic Riveter 4
Impact Wrench (3/8") 2.5-3.5
Impact Wrench (1/2") 4-5
Impact Wrench (1") 10
Mini Die Grinder 4-6
Needle Scaler 8-16
Nibbler 4
Orbital Sander 6-9
Paint Spray Gun 7-9
Ratchet (1/4") 2.5-3.5
Ratchet (3/8") 4.5-5
Rotational Sander 8-13
Sand Blast Cabinet 9-15
Shears 8-16
Speed Saw 5