SAO, SAG CENTRAL LUBRICATION
SERVICE AND MAINTENANCE
The SAO and SAG lubricating pump sets are installed in a horizontal position and are
attached to the machine or equipment wall. 2 x 6.5 mm diameter anchoring holes are
prepared for pump attachment.
After pump installation and connection of the outlet to the piping of the lubricating circuit the
oil tank is filled up with the specified lubricant. The outlet is designed for connection to TR 6,
outlet for connection to TR 8 or other required diameters must be specified in the order.
For SAO and SAG pumps equipped with the time control it is possible to set operation period
and pause period within a wide range. This is set before the pump's connection to the power
supply. The setting is made by selection of individual switch combinations on three change-
over relays. The operation period in seconds is selected on the relay identified as DS 2. The
basic range of pause period values in minutes (3 value series) or in hours (1 value series) is
selected on relay DS 3. Selection of the exact pause period, from the range (value series)
defined on relay DS 3, is consequently made on relay DS 1. For lubricating circuits with a
very long pause period, it is possible to set an automatic mode for intermediate lubrication. In
this mode an additional lubricating cycle is made during the pause period, during which the
pressure switch and lubricant level in the tank are checked. Automatic intermediate
lubrication mode is set by switching over the J 1 bridge. If the pump is equipped with a
control timer, internal or external, then it is activated by switching over the J 2 bridge.
The power supply for the control timer is made according to the valid regulations for electric
equipment. With the SAO 3P2 (SAG 3P2) it is first necessary to make the correct connection
of the external pressure switch to the control timer. If the pressure switch is not connected
then at the end of the first operation period a pressure alarm is signalled and the pump is
automatically put out of operation and blocked. The SAO 3P4 (SAG 3P4) pump is also
equipped with a pressure check, i.e. if the lubricating cycle is not finished during the
operation period (by a signal from the pressure switch) the pressure alarm is started (flashing
red light). With these pump variants, the manual push button for intermediate lubrication can
be used at any time during the pause period. One or more lubricating cycles is started with
this push button according to the set operation period. Subsequently the automatic clearing
of the set pause period is automatically cleared.
It is always necessary to use the push button for intermediate lubrication after refilling the
tank due to low lubricant level, where the low level alarm (lighting red indicator) has been lit
or in the case of a lubricating cycle repair after a pressure switch alarm (red light reset).
For correct functioning of the lubricating pump the lubricating circuit needs to be perfectly
bled, it is further necessary to the keep the piping clean, i.e. before pipework assembly to
remove burrs and other mechanical impurities.
Except for regular lubrication filling and suction strainer cleaning, approximately
twice a year,
the pump does not require any other attention or maintenance.
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