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home > Macnaught 5:1 Air Operated Oil Stub Pump with Bung Adaptor - PN# R500S > Macnaught 5:1 Air Operated Oil Stub Pump with Bung Adaptor - PN# R500S
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Macnaught 5:1 Air Operated Oil Stub Pump with Bung Adaptor - PN# R500SThe R Series range of pumps have been designed and manufactured using a strong metal construction, providing maximum performance and long service life. All the R Series pumps are supplied complete with an inline air lubricator to help prevent premature wear. Suitable for oils up to SAE140 viscosity and premix coolants. The ideal choice for remote mount or integration into lubrication systems. Macnaught Air Operated Oil Pump Specifications Model number
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The ‘R’ Series range of pumps have been designed and manufactured using a strong metal construction, providing maximum performance and long service life. All the ‘R’ Series pumps are supplied complete with an inline air lubricator to help prevent premature wear. Suitable for oils up to SAE140 viscosity and premix coolants. The ideal choice for remote mount or integration into lubrication systems.

Macnaught Air Operated Oil Pump Specifications

Model number R500S
Pump ratio 5:1 ratio
Output SAE 10 8.4gal (32L)/min
Output SAE 15W-40 8gal (30L)/min
Output SAE 90 7.3gal (28L)/min
Maximum Static Head 164ft (50m)
Airline lubricator
Pressure relief valve
2" Bung adapter
Fully serviceable
Warranty¹ 10 years
Parts guarantee² 10 years
Compatible fluids Engine and gear oils up to SAE140, auto trans, hydraulic fluid, diesel
Min-Max air pressure 60/150psi (400-1030kPa)
Min air compressor 10cfm/min (.3m³)
Air inlet 1/4" NPT(F)
Pump outlet 3/4" NPT(F)
Pump inlet Suction tube


Macnaught Air Operated Oil Pump data sheet: PDF
Instruction Manual: PDF

Features & Benefits:

  • Heavy duty construction
  • Air Inlet (1/4” NPT)
  • Oil outlet (3/4” NPT)
  • 2”  sliding bung adapter
  • Oil inlet (1” NPT)
  • Pressure relief valve
  • Large exhaust port
  • Oil lubricator
  • 10 Year Macnaught warranty

Value Proposition: The R series pumps are high quality, heavy duty, reliable oil pumps.  The ideal choice for remote mount or integration into oil systems. The strong metal construction provides maximum performance and long service life. 

Macnaught 5:1 Air Operated Oil Stub Pump with Bung Adaptor - PN# R500S

Item no : 6945243318
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US$ 990.00
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