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Idiomas disponibles
Idiomas disponibles
Small engine
compression testing
The Mityvac digital compression test kit has
two (2) adapters, 10mm and 12mm, that
allow it to be used on small engines such as
those found on lawn mowers, chain saws
and line trimmers To use these adapters:
1 Disconnect the spark plug wire and
remove the spark plug
2 Thread the appropriate size adapter onto
the compression tester main hose end
until the o-ring seats (do not use a wrench
to tighten)
3 Thread the assembly into the cylinder
spark plug hole until the o-ring on the
adapter seats firmly (do not use a wrench
to tighten)
4 Ensure the spark plug is grounded to the
cylinder head or is insulated in a way that
will prevent an electric shock hazard
5 Crank the engine over using the pull cord
(or starter if electric) a minimum of 5 rev-
olutions This will allow the cylinder to
build sufficient compression to be
measured
6 Refer to the manufacturer's data to deter-
mine the correct reading
Using the pressure
hold adapter
The Mityvac professional compression tester
comes with a pressure hold adapter
This adapter is used to perform valve seal
replacement on an engine without removing
the cylinder head(s) To use the adapter:
1 Remove the spark plug from the desired
cylinder
2 Select the appropriate extension hose that
will fit the spark plug hole
3 Using the valve core tool (from the field
service kit included), remove the valve core
from the end of the hose and lay it aside
4 Thread the extension hose into the spark
plug hole until the o-ring seats; do not use
pliers or a wrench to tighten
5 Attach the air hold adapter to the exten-
sion hose
6 Attach a shop air hose to the air hold
adapter, this will maintain air pressure in
the cylinder to hold the valves closed while
performing repairs (It may be necessary
to rotate the engine until all valve are
closed and air is holding in the cylinder)
NOTE
Air hold quick connector does not come
with a compressed air line fitting to
adapt to your air source This will have to
be purchased separately to fit your
system
9
CAUTION
To avoid personal injury and/or
vehicle damage:
While some precautions are specified in
this manual, and should be noted to
avoid personal injury or vehicle damage,
it is not possible for these cautions to
cover all conceivable ways in which
service or testing might be done, or all
possible hazardous consequences of
each way, nor could Lincoln possibly
know or investigate all such ways
It is therefore the responsibility of any-
one using this manual or any other
Mityvac product, to satisfy him or her-
self completely that neither personal
safety nor vehicle safety will be jeopard-
ized by the service methods selected
Any such injury or damage is entirely
the user's responsibility This device is
not to be used in any manner on the
human body
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