Glossary
Abnormal Wear
Any wear other than normal "polish
marks" made by the spinning motion
of the rotor and vanes. Abnormal
wear would include nicks, chips,
cracks and grooves.
Burrs
Rough edges or ridges left on metal
by cutting or drilling.
Corrosion
Gradual wearing away by rust or
chemical action.
Cracks
breaks or splits in the surface.
Damaged Splines
Cracked, broken or chipped splines
on the input shaft.
Displacement
Volume of output fluid transferred
through the pump.
Drain Hole
Excess fluid from lubricating the seal
is diverted internally in the pump
housing back to the inlet of the
pumping element via the drain holes
located in the cover and housing.
Erosion
Gradual wearing away or deteriorat-
ing.
Full Turn
Axle contacts axle stop
Grooves
A long, narrow furrow cut in a
surface.
Input Port
Opening in the pump through which
fluid is received from the reservoir.
(Suction port).
Manual Bleed Systems
Gears are mounted in such a way
that an air pocket could form in one
end of the steering gear. The bleed
screw is positioned so trapped air can
be forced out when loosened.
Nicks
Small cuts, indentations or chips on
the edge or surface.
OSHA
Occupational Safety and Health
Administration
Output Port
Opening in the pump through which
fluid is forced to the steering gear.
(Pressure port).
Relief Valve
Limits maximum supply pressure
Subassembly
An assembled unit that fits into a
larger unit
Stripped Threads
Broken or damaged threads.
Surface Imperfections
Blemish on a machined surface.
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