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Murphy Level Maintainer LM300

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Murphy Level Maintainer without Switch - LM300

Product Condition: NEW
Murphy Level Maintainer LM300
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The Murphy Level Maintainer without Switch LM300 automatically adds oil to the crankcase as needed to keep the lube level normal. Applications: Engines, Pumps, Compressors and Coolers. Note: Friction losses due to piping NOT considered.



  • Maintains proper lube level
  • High visibility “Frog Eye” lens
  • Die cast aluminum case
  • Accepts Murphy pipe mounting bracket or universal mounting bracket



  • Part No.: LM300
  • Case/Cover: Die cast aluminum
  • Float: Rigid polyurethane foam. Polyurethane coated
  • Max. Ambient Temperature: 250°F (121°C)
  • Oil Inlet Connection: Top entry 1/2-14 NPT wit built-in filter screen (removable for cleaning)
  • Inlet Orifices: 1/4 in. (6 mm); Pressure: 4 ft. oil – 15 ft. oil (1.2 m oil – 4.6 m oil); Flow Rates: 4.7 GPH - 31.0 GPH (17.8 LPH - 117.3 LPH)
  • Max. Inlet Pressure (MIP): 15 ft oil (4.6 m oil) with 1/4 in. (6 mm) orifice
  • Max. Differential: 2 in. (51 mm) between running and stationary oil level
  • Max. Case Pressure (MCP): 15 psi (103 kPa) [1.03 bar]
  • Orifice Seal†: Buna-N Thumb-Valve
  • Outlet Connection: 3/4-14 NPT left side, right side, and bottom
  • Crankcase Balance Vent Fitting: 1/2-14 NPT
  • Mounting: Accepts Murphy pipe mounting bracket or universal mounting bracket
  • Lens: Clear “Frog Eye” non-staining, high impact, high temperature nylon; UV and heat stabilized
  • Dial: High visibility white background with green and white “index” lines for normal level indication.
  • Shipping Weight: 6 lbs. 6 ozs. (2.89 kg)
  • Shipping Dimensions: 10-5/8 x 8-7/8 x 6-3/4 in. (270 x 225 x 171 mm)

Additional Information

Product Condition NEW
upc No

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