© by WilTec Wildanger Technik GmbH
Item 51726
Page 4
12 2021-1
Air supply
•
Ensure that the air valve regulator is in the “off” position before connecting the device to the air
supply.
•
The tester requires an air pressure of 3–7
bar (45–100
psi).
•
Warning!
Make sure that the air supplied is clean and does not exceed the pressure stated.
Too high an air pressure and/or unclean air will shorten the life of the device. Excess of wear
and tear can be dangerous and may lead to damages and/or injuries.
•
Empty the air tank of the compressor daily. Water accumulated inside the air line will damage
the tester.
•
Weekly clean the air inlet filter.
•
The pressure inside the line should be increased to compensate for unusually long air hoses
(above 8
m). The minimum diameter of hoses and fittings is 12.91
mm (¼″).
•
Keep the hoses away from heat, oil, or sharp edges. Check the hoses for wear and tear and
make sure that all connections are secure.
Use
With the tester connected to one of the cylinders, compressed air is fed to the respective cylinder via
the built-in pressure regulator. Diagnosis is made by observing the amount of leakage indicated on the
cylinder leakage gauge. Furthermore, diagnosis can be made by listening to the sound produced at
various spots of the vehicle where leakages have developed.
Listening spots
•
Oil dipstick tube – check for leakage from damaged or worn rings and/or cylinder wall
•
Radiator filler – check for cracks in cylinder wall or leaking head gaskets
•
Adjacent cylinders – check for head gasket leakage
•
Tail pipe – check for leaking exhaust valves
•
Carburettor air inlet – check for leaking inlet valves
•
Fuel injection throttle body – check for leaking inlet valves
Connecting the system
1.
Leave the engine running until the operating temperature is reached.
2.
Remove the spark plugs, oil dipstick, radiator cap, air filter from carburettor (with injection sys-
tems, remove the air filter or hose from the throttle body).
3.
Position the piston No. 1 at the top dead centre (TDC) on the compression stroke so that both
inlet and exhaust valves are closed.
Note!
Always rotate the engine in the normal operating direction. To position the piston properly,
use a piston positioning gauge and remove the cam/rocker cover so that closed valves can be
confirmed.
4.
Screw the cylinder hose
(C)
into the spark plug hole. With 10-mm or 12-mm threads connected,
use appropriate adaptors. Only connect the tester after the leakage gauge has been calibrated.
5.
Screw a 13.5-mm (¼″) external thread connector into the threaded hole on the side of the regu-
lator (connector not supplied). Turn the regulator knob of the tester fully anti-clockwise to shut
down the regulator before connecting the air supply. Connect the compressed air supply with
an air pressure of 3–7
bar (45–100
psi).
6.
Calibrate the leakage gauge by turning the regulator knob anti-clockwise until the needle on the
right-hand gauge reaches zero at the end of the yellow “SET” band. Typically, this will happen
with pressures between 1.03 and 1.37
bar (15 and 20
psi). Now, insert A connector on the cylin-
der hose into B connector on the tester hose. Any leakage present in the cylinder currently
connected will be shown on the leaking gauge as percentage loss. A cylinder without leakage
will show approximately 20 % within the green band.
7.
Test all other cylinders, each at TDC, and compare the leakage values to determine the which
cylinders are faulty.