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4.2.1.
Move slide valve so that brass bleed screw is exposed (fig.3.1).
4.2.2.
Adjust pressure bleed screw clockwise until firm - DO NOT over tighten (fig.3.2).
4.2.3.
Press the brass bleed screw until the valve slides across (fig.3.3).
4.2.4.
Operate hand pump to inflate bladder to 15 psi (DO NOT exceed this pressure) (fig.3.4)
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.
4.2.5.
Move slide valve so brass bleed screw is exposed (fig.3.5)
4.2.6.
Operate hand pump to pressurise system to manufacturers specified pressure - DO NOT exceed this pressure as system damage
may occur (fig.3.6).
•
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.
4.3.
REMOVAL FROM SYSTEM
WARNING: DO NOT deflate bladder or disconnect the unit until gauge reads '0' psi.
‰
4.3.1.
Adjust pressure bleed screw anti-clockwise (fig 4.1).
fig.4
4.3.2.
Allow pressure to release via drain hose until gauge reads '0' psi (fig.4.2).
4.3.3.
Press on brass bleed screw until valve slides across (fig.4.3).
4.3.4.
The bladder is now deflated (fig.4.4).
4.3.5.
Release retaining clips and remove (fig.4.5).
5. MAINTENANCE
5.1.
This unit is a testing instrument and should be treated accordingly. Keep unit clean by rinsing with water after each use to prevent
internal components sticking.
Note: DO NOT use harsh chemicals or solvents.
5.2.
The rubber bladder and safety seal will wear with normal use. Replace bladder or safety seal if any deterioration is noted.
5.3.
BLADDER REPLACEMENT:
5.3.1.
Remove centre tube mounting screw from base of centre tube.
5.3.2.
Remove centre tube flange.
5.3.3.
Remove bladder from stem.
Install new bladder onto stem using a twisting action (use water as a lubricant if required - DO NOT use grease or other lubricants).
5.3.4.
5.3.5.
Install centre tube flange.
Install centre tube mounting screw with 'O'- ring and tighten fully. Note: DO NOT over tension.
5.3.6.
5.3.7.
Inflate bladder to three or four times to condition and stretch material.
5.3.8.
With bladder inflated, immerse in water to test for leaks.
6. TROUBLESHOOTING
6.1.
PRESSURE DROP ON BLADDER CIRCUIT
6.1.1.
Check mounting of bladder to sleeve, centre tube flange and stem.
6.1.2.
Check tension of centre tube mounting screw.
6.1.3.
Check one-way pressure valve for leakage. Mounted in hand pressure pump. Use genuine replacement parts only.
6.1.4.
Check condition of pressure bleed screw and seat.
6.1.5.
Check condition of side valve 'O'-rings.
6.2.
PRESSURE DROP ON SYSTEM CIRCUIT
6.2.1.
First confirm the pressure drop is not due to a leak in the cooling system.
6.2.2.
Check bladder size is adequate to seal tank neck. Condition bladder by inflating to 15psi three or four times off vehicle if
required.
6.2.3.
Ensure correct adjustment of unit as per instructions (fig.2)
6.2.4.
Check one-way pressure valve for leakage. Mounted in pressure pump.
6.2.5.
Check condition of pressure bleed screw and seat.
6.2.6.
Check condition of slide valve 'O'-rings.
© Jack Sealey Limited
Original Language Version
VS0031.V3
Issue 1
24/03/22
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