Blohm + Voss Oil Tools 9PU-7200, Техническая документация инструкция

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There are two pumps incorporated with the
Hydraulic Power Unit.
The first pump is a large pressure
compensated hydraulic pump. Essentially,
it is one that senses outlet pressure and
adjusts displacement accordingly. The pump
has a 3/4” case drain with no restriction. The
pump has its own bypass-able, inlet strainer
and ball valve. This pump has a pressure
filter downstream of the pump outlet. After
the filter, there is a check valve. Both the
filter and the check valve are inline before reaching the power unit bulkhead. FloorHand oil
is strained, pumped, filtered, used, cooled, then filtered again, prior to returning to the tank.
The second pump (a circulation gear pump) is a small gear type pump that also has its own
suction strainer and valve and uses the meshing of gears to pump fluid by displacement.
The strainer on this pump is also bypass-able. The sole purpose of this pump is to circulate
oil through the cooler and return filter even when the FloorHand is not being used. The
small pump strains fluid from the tank and then sends the fluid to the cooler. From the
cooler the fluid is then pumped through a return line filter and back to the tank.
There is a small amount of oil that is not filtered prior to returning to the tank. This is oil that
is taken from a small port on the outside of the cooler to flow over the temperature probe.
The fluid is not run through the filter as to not cause any restriction. There is a free flow of
fluid over the probe then to the tank to keep an accurate temperature reading
The explosion proof temp switches will vary slightly, they normally turn the fan on between
123 and 130 °F (50.5 and 54.4 °C) and then they cool the oil for a drop of 15-20 °F (-9.4 to
-6.6 °C) before turning off.
Start-up procedure
Verify that the main suction inlet ball valve and circulation pump inlet ball valve are in the
open position.
Verify that the compensator control ball valve is in open position. Verify that the main pump
case is filled with oil. The Hydraulic Power unit has been operated, tested and adjusted at
the factory for use with the FloorHand Wrench and Spinning Tool. Transportation require
-
ments are such that the pump must be drained. Once the unit has been delivered,
The pump will always need to be primed.
Figure 5