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Equivalents And Oil Change; Oil Change Record - Kärcher HDS3.5/20 Operator's Manual

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PRESSURE EQUIVALENTS
Simply stated, pressure is the force exerted by a gas or liquid attempting to escape from a container. It is useful
to know how strong this "attempt to escape" is. Pressure can be mea sured with a manometer or with a pressure
gauge. At the low er levels, it is expressed in water column inches i.e. 11 w.c.i. Higher pressures are ex pressed
in terms of the force exerted against a square inch of area, for example, 125 lbs. per square inch (125 psi).
1" Water Column
11" Water Column
1 lb./sq. in.
1 Std. Atmosphere

OIL CHANGE RECORD

MAINTENANCE AND SERVICE
=
50 oz./sq. in. 11" Water Column
=
4 lb./sq. in. 1 lb./sq. in.
=
14.73 lbs./sq.in 1" Mercury
=
14.73 lbs./sq. in.
Date Oil Changed Month/
Day/Year
9.801-509.0 - C • Karcher Operator's Manual
=
=
=
Estimated Operating Hours
Since Last Oil Change
6.35 oz./sq. in.
27.71" Water Column
.39 lb./sq. in
29

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