Mityvac 06820 Diesel Compression Test Adapters - Manual (Page 4)

Page Number - 4
Form 822378
THE PUMP
The vacuum pump is an extremely
versatile 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 applica-
tions 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 diagnostic
tool requirements when such tools are
specified for some state vehicle inspec-
tion programs.
This section will describe the pump, give
specifications, 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 pump is simple,
accurate, easy to use and has many
applications. Although the pump comes in
several different versions, the basic unit
consists of a pump body, moveable
handle, vacuum gauge, vacuum fitting
and a safety capped pressure fitting. The
pump is easily held in your hand, and
when the handle is squeezed, a vacuum
is drawn at the vacuum fitting. If the
vacuum of the pump is connected to a
closed container or system, the gauge
will show the vacuum level. If the
pressure fitting is attached to the
container or system, a pressure will be
generated but will not show on the
gauge. If it is desired to read the amount
of pressure, a separate pressure gauge
is available.
VACUUM RELEASE
There are two basic methods of releas-
ing vacuum at the pump. The first method
is the Trigger Vacuum Release. It is a
straight lever, which must be pulled
straight back to release the vacuum. This
action allows air to enter the system,
thus relieving the vacuum.
The second method is a spring action
rotary release. By slowly turning the
vacuum release tee, the vacuum can be
gradually released. By turning the tee
quickly, the vacuum will be released
quickly.
SAFETY CAP
The small cap on the pressure fitting is
pressed on with a friction fit. It can be
removed with a twisting pull. The cap is
used to prevent any fluids (brake fluid,
etc.), which may have accidentally been
pulled into the pump, from squirting into
the user’s eyes. For this reason, the cap
should always be in place when using
the pump, except when using the
pressure fitting. The pump will last for
many years when cared for properly.
See PROPER CARE in this section.
SPECIFICATIONS
Application M e a s u r e m e n t
Maximum Vacuum
At Sea Level Approx. 23-25” Hg.
Stroke Volume
Standard 1 cu. in.
Repairable 1 cu. in.
Superpump 2 cu. in.
Silverline 1 cu. in.
Maximum Pressure
Unassisted
Standard 7 psi.
Repairable 12 psi.
Superpump 7 psi.
Silverline 15 psi.
Assisted
Standard 16 psi.
Repairable 95 psi.
Superpump 12 psi.
Silverline 30+ psi.
Gauge accuracy
15-20 in. HG. 3%-2%-
3% of full
range.
MAINTENANCE KITS are available only
for repairable pumps, which have been
assembled with visible screws. Non-
repairable pumps have been chemically
sealed and cannot be opened without
damaging the pump. Except for lubrica-
tion, no repairs should be attempted on
these units. See LUBRICATION in this
section.