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Installation
S149-01-880 Issue F
3.9.1 Initial oil fill
Starting the Microvac pump when the oil temperature is below 13 °C (55 °F) can result in excessive wear and
galling damage to the moving parts.
The Microvac pump is shipped with an initial charge of oil; 10 liters (2.5 gallons) for the 149-H/149-HS, 15 liters (4.0
gallons) for the 212-J; and, 45 liters (12 gallons) for the 412-J. Before connecting the suction manifold, slowly rotate
the pump through two (2) revolutions. This will distribute the oil throughout the pump interior.
The oil fill plug on the top of the pump serves a dual purpose. It is an oil fill port and an over-
pressure device that opens at between 8 and 14 psig. This device is to protect the pump from oil
box over-pressure and possible side cover fracture. The 412J pumps are fitted with two oil fill
plugs, ensure at least one of these is free from obstruction i.e. not connected to anything.
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