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473R 1 gallon Reservoir
Metal Container Reservoir 1, 5 and 10 gallon - 473R, 477R and 479R
Service Kits & Literature

Servo-Meters can be supplied with oil by pressure systems (up to 30 psig) or gravity systems. Gravity systems are generally preferred. Remote reservoirs should be connected to the bottom port of Serv-Oil equipment with a minimum 5/16" I.D. line.

Stand-pipes should be installed from the top of the equipment and extend above the reservoir for gravity systems to prevent airlock of the Servo-Meters.

Sight domes are available to vent air from the system, and to confirm visually the presence of oil. Pressure-fill systems should be vented, or use low velocity recirculation of the oil supply.


For most applications Master Pneumatic recommends a light spindle oil (150-1200 ssu viscosity) that is not chemically aggressive.

Metal reservoirs in 1-gallon (3.8-liter), 5-gallon(18.9-liter), and 10-gallon (38-liter) capacities have an internal oil filter, sight tube, and filter breather fill cap. All reservoirs have quick-fill fittings.

Level Switches

When the reservoir is located where oil level can not easily be determined visually, electric oil level switches can be used. Both low-level and high-level switches are available. The switches can be connected to a remote electrical control for automatic filling.


1 gallon (3.8 l)   =    102,000 drops
5 gallons (19 l)   =   508,000 drops
10 gallons (38 l) = 1,020,000 drops

One drop = 1/30 cc. Capacity in drops is at 90% of full capacity.

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