LD Series Pump, 3:1


For dispensing non-corrosive and non-abrasive lubricants, oil, grease, and automatic transmission fluids in stationary or mobile installations. Use with compressed air only. For professional use only. Not for use with windshield washer fluid.

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SKU: 500425 Category: Tags: , ,


The LD Series 3:1 ratio double acting pump is engineered for outstanding performance and reliability to dispense lubricating oils and similar products. The perfect solution for Dealerships, Quick Lubes, and Agriculture equipment maintenance.

Features Include:

  • Three Inch Air Motor – Provides more power to create better flow.
  • NXT Air Valve – Designed to reduce icing in continuous use applications and uses less air than competitive pumps for better efficiency. Easy to repair or replace without tearing down internal pump components for less downtime.
  • Modular Air Valve – Air inlet and exhaust locations are easy to configure with just four bolts for simple, hassle free installations.
  • Built-In Thermal Relief and Inlet Strainer – Built-in thermal relief protects your equipment from thermal expansion without the need to buy and install an additional kit. Inlet strainer (oil only) is built-in to protect pump from contaminants that can damage your pump.
  • Cup and plate design eliminates the need for O-rings that wear out faster
  • Includes bung adapter


NOTE: Thermal expansion of the fluid in a distribution system can cause an increase in system pressure that can damage to components. Pressure relief valve is recommended.

NOTE: Warning! Do not use any LD series products with flammable fluids.

Additional information

Weight 7 lbs
Typical Applications:

Automotive Dealerships, Mobile Lube, Quick Lubes, Tire Center, Transmission Centers

Fluid Types:

Motor Oil, Gear Oil, Hydraulic Fluid, Automatic Transmission Fluid, Oil, Grease

Maximum Working Pressure

450 psi (31 bar, 3.10 MPa)

Fluid Pressure Ratio


Suction Lift (feet of oil)


Air Operation Range

25 – 150 PSI (1.37 – 10.3 bar)

Recommended Air Pressure (for optimum pump life)

Less than 125 psi (8.6 bar, 0.86 MPa)

Air Consumption (at 100 psi)

See Performance Curves in instruction manual 3A1334

Maximum Recommended Pump Speed

3:1 120 cycles/min

Cycles per gallon (liter)

29 cycles/gal (7 cycles/liter)

Recommended Speed (for optimum pump life

75 cycles/min and lower, 2.6 gal/min (9.8 l/min)

Wetted Parts

zinc plated carbon, steel, aluminum, nitrile, polyurethane, nickel plated aluminum

Sound Power Level, measured per ISO 9614–2 at 100 psi air pressure (6.89 bar, 0.68 MPa) and 20 cycles per minute. Muffler 112933 can be ordered separately for reduced sound levels.

82.0 dB(a)

Performance Curve

See charts in instruction manual 3A1334

Air inlet

1/4"-18 NPT

Fluid inlet

1"-11.5 NPT

Fluid outlet

1/2"-14 NPT

Free Flow

7.8 gpm

Manufacturer Part Number