InSTrUCTIonS For:
VACUUM And pressUre
test / brAke bleedInG UnIt
moDEL no: vs403.v2
Thank you for purchasing a Sealey product. manufactured to a high standard this product will, if used according to these instructions and properly maintained, give you years
of trouble free performance.
IMPORTANT: PLeAse ReAD THese INsTRucTIONs cARefuLLy. NOTe THe sAfe OPeRATIONAL ReQuIReMeNTs, WARNINGs, AND
cAuTIONs. use THIs PRODucT cORRecTLy, AND WITH cARe fOR THe PuRPOse fOR WHIcH IT Is INTeNDeD. fAILuRe TO DO sO MAy
cAuse DAMAGe AND/OR PeRsONAL INJuRy AND WILL INvALIDATe THe WARRANTy.
1. sAfeTy INsTRucTIONs
Keep this product in good working order and condition, take immediate action
to repair or replace damaged parts.
Use approved parts only. Unapproved parts will invalidate the warranty.
Keep children and unauthorised persons away from the work area.
Keep work area clean and tidy and free from unrelated materials.
Ensure the work area has adequate lighting.
DO NOT use the kit to perform a task for which it is not designed.
DO NOT hold pump inlet against the skin whilst using the pump.
DO NOT allow untrained persons to use the kit.
DO NOT
medication.
After use, clean equipment and store in a cool, dry, childproof area.
WARNING!Brake fluid will damage paintwork. Any spillage should be
flushed with water immediately.
WARNING!Brake fluid is flammable - keep away from sources of ignition,
including hot surfaces e.g. exhaust manifold.
Dispose of waste liquids in accordance with local authority regulations.
WARNING! DO NOT pollute the environment by allowing uncontrolled
discharge of fluids.
Always read and comply with the warnings on the brake fluid container.
Wear eye protection and keep skin contact to a minimum. If brake fluid
enters eyes rinse with plenty of water and seek medical advice. If
swallowed seek medical advice immediately.
use whilst under the influence of drugs, alcohol or intoxicating
2. INTRODucTION & cONTeNT
Professional vacuum/pressure diagnostic tool helps identify a variety of faults
on vehicle systems including fuel, ignition, transmission, emission and air
conditioning/heating. Set also includes reservoirs, hoses and adaptors for
bleeding brake and clutch systems. Features lightweight aluminium body with
simple sliding sleeve for choice of pressure or vacuum testing. Large rubber
easy-to-read gauge.
Contents: Vacuum Pump, 2 x Fluid Container, Transfer Cap, Vacuum Hoses;
1 x 65mm, 1 x 80mm, 1 x 90mm, 2 x 600mm, 14 x Assorted Connectors and
blanking caps.
fig.1
fig.1
3. APPLIcATIONs
The use of a vacuum/pressure gauge is often overlooked when determining
mechanical condition and carrying out fault diagnosis on internal combustion
engines. monitoring actual manifold vacuum is invaluable when troubleshooting
engine faults. This can only be carried out by using a good quality vacuum
gauge and this, coupled with a hand-operated vacuum pump, also allows static
testing of all types of vacuum operated systems.
Set out on the following pages are applications that the VS403.V2 vacuum and
pressure tester kit can be used for, but it must always be remembered that
these are examples only and reference to manufacturer’s service manuals
should always be made for correct testing procedures and specifications.
In addition to this, it is always recommended that additional tests, ie. compression tests, cylinder leakage tests, ignition timing checks etc. be carried out to
confirm indications of vacuum/pressure gauge readings.
Original Language Version
VS403.V2 Issue: 1 - 09/01/12
4. OPeRATING INsTRucTIONs
fig.1
fig.2
4.1 This hand pump and its adaptors can be used to test vacuum motors and
control valves as well vacuum or pressure operated systems and
components that require to be properly sealed. The pump and its
associated accessories can also be used to bleed brakes. In pressure
testing mode the pump may be utilised to dispense or transfer liquids and
provide slight pressure during gravity or pressure bleeding.
The VS403.V2 can be used for both pressure and vacuum testing by
means of the sliding sleeve selector at the front end of the pump.
To select PRessuRe TesTING mode, move the sliding sleeve away
from the nozzle end of the pump until it makes contact with the main
body. See fig.1A above. The hole indicated at 'X' must be fully covered.
To select vAcuuM TesTING mode, move the sliding sleeve away
from the main body of the pump until it makes contact with the 'o' ring
just behind the nozzle. See fig.1B above. The hole indicated at 'X' must
be fully revealed.
4.2 Analysing engine Mechanical condition via Manifold
vacuum Readings
The gauge readings shown on the right hand side of this page are only
examples of what may be observed. It is important to remember that it is
the action of the needle rather than the actual reading that is more
important. Varying engine types will run different manifold vacuum
pressures, depending on camshaft profile, valve overlap, timing etc, so an
exact vacuum reading cannot be specified. The main criteria is that the
needle reading is between 16 to 21inHg and steady. manifold vacuum is
also affected by altitude and it will drop approximately 1inHg for every
1000 feet above sea level so this must also be considered when
assessing manifold vacuum actual readings.
step 1. run engine until normal operating temperature is reached. Switch
engine off.
step 2. Locate and connect the vacuum gauge to a port directly on the
manifold (fig.3) or on the carburettor/throttle body below the throttle
butterfly.
step 3. Start and run the engine at idle, observing the gauge reading.
refer to the gauge examples on the right of this page to indicate any
problems and their possible causes.
(1) ReADING: 16 - 21inHG
DIAGNOsIs: normAL
(3) ReADING: Extremely low but
steady
DIAGNOsIs: Leaking intake manifold
system, Faulty manifold gasket or
carburettor base gasket, split vacuum
hose, seized open EGr valve.
(5) ReADING: reading slightly low
and fluctuating slowly.
DIAGNOsIs: over lean or rich
mixture. Check and reset in
accordance with manufacturer’s
specification.
(2) ReADING: When the throttle is
suddenly opened then released,
the needle should drop to below
5 inHg then bounce up to
approximately 25 inHg before
settling back to the original reading.
DIAGNOsIs: normAL
(4) ReADING: reading low but steady
DIAGNOsIs: retarded ignition timing.
Confirm using timing light and reset to
manufacturer’s specification.
(6) ReADING: regular fluctuation
between normal and low.
DIAGNOsIs: Blown head gasket
between two adjacent cylinders. Carry
out cylinder leakage test.
fig.3
(7) ReADING: reading slightly lower
than normal including when throttle is
suddenly opened then released.
DIAGNOsIs: Worn piston rings. Carry
out compression test.
Original Language Version
(8) ReADING: regular drop between
normal and low reading.
DIAGNOsIs: Burnt valve.
(9) ReADING: normal when first
started but drops rapidly when rPm
held at 3000.
DIAGNOsIs: restriction in exhaust
system.
VS403.V2 Issue: 1 - 09/01/12
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