The vacuum/pressure pump is an extremely ver-
satile service tool that can be used to test a variety
of automotive systems and perform a number of
useful tasks . Though the pump has obvious uses for
testing various vacuum motors, control valves and
vacuum sources, its applications don’t end there .
Almost any part or system that requires proper
sealing, pressure or vacuum to operate can be
tested with the vacuum pump . The pump and its
accessories also transfer fluids, help to bleed brakes
and aid in other tasks . The pump also meets diag-
nostic tool requirements when such tools are speci-
fied for some state vehicle inspection programs .
This section will describe the pump, give specifica-
tions, tell how to use the pump and provide some
service tips to help you keep your pump in tip
top-shape .
DESCRIPTION
The hand-held vacuum/pressure pump is simple,
accurate, easy to use, and has many applications .
It consists of a pump body, moveable handle, com-
pound vacuum/pressure gauge, vacuum/pressure
converter switch, and connection fitting . The pump
is easily held in your hand, and when the handle is
squeezed, either vacuum or pressure is produced
at the front fitting . If the front fitting of the pump
is connected to a closed container or system, the
gauge will show the vacuum or pressure level .
Selecting whether to have the pump produce either
vacuum or pressure at the connection fitting is as
simple as turning the knob located on the front
left side of the pump . The vacuum/pressure valve
housing is marked with “Pressure” and “Vacuum” .
Rotate the knob such that the arrow aligns with
the desired output . Depending on the position of
the knob, either vacuum or pressure is produced
by squeezing the pump handle . The return of the
handle has no effect on the output .
VACUUM RELEASE
The vacuum or pressure can be released by lifting
up on the Release Lever . This action allows air to
enter the system, thus relieving the vacuum/pres-
sure . Vacuum/pressure will also be released when
the hose is detached from the front fitting .
SPECIFICATIONS
Maximum Vacuum
Approx . 25” Hg
@ Sea Level:
(85 kPa)
Stroke Volume:
1 cu . in . (16cc)
Maximum Pressure:
30 psi (205 kPa)
Gauge Accuracy:
3%-2%-3%
of full range
USING THE PUMP
The pump is simple to use . In most cases, it’s at-
tached directly to a component, used in place of a
vacuum line or connected into a vacuum circuit with
a tee connector . The pump can be operated as a test
instrument in two ways:
1) When vacuum or pressure is desired for a test,
the converter switch is turned to the desired output,
and the movable handle of the pump is simply
squeezed with your hand, as in clenching your fist .
Continue strokes until desired vacuum or pressure is
indicated on the gauge .
2) The pump can be connected into a vacuum
or pressure circuit and used to measure existing
amounts of vacuum or pressure, just as any gauge
would be used . When used this way, do not pump
the handle, or incorrect readings may result .
PROPER CARE
Your pump is a sturdily built, precision test
instrument . Do handle it carefully! Don’t drop or
handle roughly as the gauge accuracy may be
affected . Never exceed the rated pressure of the
gauge, as this can cause loss of accuracy and
permanent damage . Care for your pump and it will
give you years of trouble-free service .
LUBRICATION
The factory-installed lubricant is silicone oil and
should provide very long service . If you find it
necessary to lubricate your pump, use silicone oil .
If unavailable, you may use DOT 5 (not DOT 3)
silicone-based brake fluid or a salad vegetable oil .
Do not use petroleum based fluids or spray
lubricants (WD-40, motor oil, etc .), as these will
damage the pump .
the pump
Page Number - 4
Form 824426
