Background - SPX LeakMaster 6525 Manual Del Operador

The fuel vapor recovery system is the most
neglected part of a vehicle's emission system,
according to the Environmental Protection
Agency (EPA).
The vehicle's EVAP system is used to collect fuel
vapors from the fuel tank. These vapors are stored in
a canister filled with activated charcoal. The EVAP
system allows the fuel vapors to be drawn from
the canister and combust during certain operating
conditions. This process is called canister purging,
since the fuel vapors are purged from the canister.
OBD-II requires Powertrain Control Module (PCM)
monitoring for correct operation of the EVAP system
and for possible leaks to the atmosphere.
A faulty EVAP system will allow hydrocarbons (HC)
to escape into the atmosphere. Factory emission
tests have determined that an EVAP system
with a leak as small as .020 can yield an
average of 1.35 grams of HC per vehicle-
driven mile. This is over 30 times the current
allowable exhaust emissions standard.
In addition to causing HC emissions, failure of the
EVAP system wastes fuel and many times creates
customer-complaints of "gasoline odors." With
the introduction of On-Board Diagnostics
(OBD), the automotive industry is capable of
determining if a vehicle's evaporative system
has a leak. Prior to the LeakMaster No. 6525,
determining the location of an EVAP leak was a
difficult and time-consuming challenge.
LeakMaster Operation
The LeakMaster is a dual-phase tool. Phase One
uses an inert gas, such as nitrogen, to test the integrity
of the vehicle's fuel vapor recovery system by quickly
determining if, in fact, a leak exists. Phase Two
quickly finds the leak using both visual vapor (smoke)
®
and UltraTraceUV dye technology. UltraTraceUV
is a unique chemical bonded to the smoke that deposits
an ultraviolet fingerprint at the exact location of the
leak.

Background

This dual-phase operation is accomplished
automatically. LeakMaster sets the critical pressure
that must be maintained during EVAP testing. You
don't need to set flow rates, and you don't need to be
concerned with ambient temperatures or barometric
pressures.
LeakMaster will not spill its solution regardless of
the position it's placed in, and is refillable by the end
user when the smoke-producing solution is depleted.
The smoke it produces, as well as the UltraTraceUV
dye, is non-toxic and non-corrosive.
LeakMaster needs no assembly, is self-calibrating, and
requires no maintenance, other than a recommended
annual smoke solution change.
Read this manual in its entirety before
performing any actual tests on a vehicle.
The LeakMaster should be operated only by
trained and qualified technicians.
• When the vehicle's engine is turned off, the
OBD-II EVAP system is generally venting in
one form or another. Use a scanner to close
the EVAP system in order to perform any
leak tests. Remember, ALL tests with
the LeakMaster are performed with
the engine OFF.
• It is best to perform all testing in calm air, so
the smoke exiting the leak will not be blown
away, impairing your view of the leak.
• Because of the EVAP system's volatile
fumes, we always recommend you use an
inert gas, such as nitrogen, when testing the
evaporative system. However, LeakMaster is
®
also designed to perform its functions with
conventional shop air, if being used to test
systems other than the EVAP system.
Tech Tips
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