30
Maintenance
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 measured with a manometer or with a pressure
gauge. At the lower levels, it is expressed in water column inches i.e. 11 w.c.i. Higher pressures are expressed in
terms of the force exerted against a square inch of area, for example, 125 lbs. per square inch (125 psi).
Oil Change Record
1" Water Column
=
50 oz./sq. in.
11" Water Column
=
6.35 oz./sq. in.
11" Water Column
=
4 lb./sq. in.
1 lb./sq. in.
=
27.71" Water Column
1 lb./sq. in.
=
14.73 lbs./sq.in
1" Mercury
=
.39 lb./sq. in
1 Std. Atmosphere
=
14.73 lbs./sq. in.
Date Oil Changed Month/
Day/Year
Estimated Operating Hours
Since Last Oil Change
Karcher Liberty HDS Stationary Dealer’s Manual 9.801-508.0 - AY
Summary of Contents for HDS4.0/22
Page 25: ...25 Maintenance Karcher Liberty HDS Stationary Dealer s Manual 9 801 508 0 AY...
Page 36: ...36 Notes Karcher Liberty HDS Stationary Dealer s Manual 9 801 508 0 AY...
Page 45: ...45 Karcher Liberty HDS Stationary Dealer s Manual 9 801 508 0 AY Notes...
Page 97: ...97 Karcher Liberty HDS Stationary Dealer s Manual 9 801 508 0 AY Notes...
Page 98: ...9 801 508 0 Printed in U S A...