Oil handling equipment

Macnaught T312 Oilmaster oil ratio pump



Ref: LT312 / Oilmaster 3:1 air operated oil ratio pump (stub)

The T312 3:1 ratio oil pump is designed to transfer oils up to 30 metres and can be used with any of Macnaught‰Ûªs hose end gun range.

  • Stub pump for inclusion in a workshop or mobile bulk oil system
  • Suitable for oils up to SAE 140, automatic transmission fluid
  • 2" (M) bung adaptor supplied
  • No requirement for in-line lubricator
  • Optional TB25s suction tube available
  • 10 year parts availability


1.‰ÛâFlow rates in litres per minute at 700kPa / 100psi / 7bar and 23å¡C

2.‰ÛâFlow rates are a guide only and the actual output may vary from that stated

3.‰ÛâVariations in flow rate can result from compressor volume, air pressure, hose construction, hose fittings, ambient conditions and system pipe work

Wetted components Aluminium, zinc and hard chrome plated carbon steel, brass and nitrile and polyurethane rubber
Pump ratio 3:1 (oil pressure is 3 x the air pressure)
Output 15 litres (4 US gal.) per min of SAE 10 oil at 100psi air pressure (free flow)
Max. air pressure 1000 kPa / 145psi / 10 bar
Min. air pressure 400 kPa / 60psi / 4 bar
Min. air compressor 0.08må?/min. (3 cfm/min)
Air inlet 1/4" BSP (F)
Pump inlet 1" BSP (or NPT (F) and 1" UNEF)
Pump outlet: 3/4" BSP or NPT (F)

Flow rate table

Material Free flow (per min.)
at pump outlet @ 690kPa / 100psi (air)
Litres (US gal) per min
Output (per min.) through 9m (30ft) x 12.5mm (1/2")
hose and hose end oil delivery gun
Litres (US gal) per min
Oil SAE 10 15 (4) 10 (2.6)
Oil SAE 30 13 (3.4) 7 (1.8)
Oil SAE 90 10 (2.6) 6 (1.6)
Flow rates are a guide only and any variations can depend on system set-up