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fig.2
note: It may not always be possible to adjust the bladder the desirable position (two thirds of the bladder below lower flange). The
flexible nature of the inflatable bladder will create the required seal in these applications.
fig.3
4.5.
Pressure testing
Warning: Do not run engine while pressure testing.
‰
note: If testing is being carried out on a warm engine a pressure drop may occur due to engine cool down, which may not be due
to a leak. Pressurise and inspect again after cool down is complete.
fig.4
4.5.1.
Move slide valve so that brass bleed screw is exposed (fig.4.1).
4.5.2.
Adjust pressure bleed screw clockwise until firm - Do not over tighten (fig.4.2).
4.5.3.
Press the brass bleed screw until the valve slides across (fig.4.3).
Operate hand pump to inflate bladder to 15 psi (Do not exceed this pressure) (fig.4.4).
4.5.4.
note: Due to the design of the internal pump seal, a vigorous pumping action is required to activate the seal and pressurise
the system. a light or slow pumping action will prove ineffective. the larger the air space within the cooling system being
tested, the more vigorous the initial pumping should be. By filling the cooling system and therefore reducing the airspace
within, less effort will be needed to pressurise it.
4.5.5.
Move slide valve so brass bleed screw is exposed (fig.4.5).
Operate hand pump to pressurise system to manufacturers specified pressure - Do not exceed this pressure as system damage
4.5.6.
may occur (fig.4.6).
•
If system pressure is maintained no serious leaks are present.
•
A pressure drop indicates a system leak.
•
Continued pressure drop, visually inspect for external leaks.
© Jack Sealey Limited
Original Language Version
fig.2.A
VS0014 Issue 1 04/04/18
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