Hydraulics
9803/7130 Issue 1
4 - 1 4 - 1
Circuit Descriptions
Section E Section E
Hydraulic Pump Operation (Typical)
The hydraulic pump is a gear type. The basic principle of the
pump depends on the meshing of the two spur gears A and
B, one of which is engine-driven whilst the other is an idler.
Oil is picked up on the inlet side of the pump by the gears
and carried round between the gear teeth and the pump
body. As the gears come into mesh the oil is forced through
the pump outlet port.
Lubrication is provided by the hydraulic oil which is directed
around the unit, via special oil ways, by the motion of the
meshing gears.
Component Key:
A Spur Gear - Idler
B Spur Gear - Driven
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