Page 6SKU 92649
For technical questions, please call 1-800-444-3353
NOTE: In the above photo both Low Pressure Hose (19) and High Pressure Hose (17)
are in the storage position and are attached to Solid Storage Connectors (6 & 7).
To Conduct a Performance A/C System Test:
1. A performance test indicates air conditioning system condition by measuring system
pressures with the engine running.
2. Turn the Red Thumb Handle (11) and Blue Thumb Handle (11) clockwise to the CLOSED
positions. See FIGURE 1, above.
WARNING: DO NOT, AT ANY TIME, OPEN the Thumb Handles (11) or refrigerant will be
leaked to the atmosphere and the A/C system may become contaminated.
3. Turn the Red Control Valve (22) and Blue Control (23) counterclockwise, to the CLOSED
position. See FIGURE 1 on page 6.
4. Connect the Red High Pressure Coupler (22) to the A/C system high side line. Connect
the Blue Low Pressure Coupler (23) to the A/C system on the low side line.
See FIGURE 1, above.
Operation (continued)
Coupler (23) clockwise to open.
8. Note: The pressure you see on both the high and low side gauges should be the same
or very close. Now, compare the reading taken to the reading as noted in the vehicle
manufacturer’s service manual.
9. Turn the Control Valves of the Red High Pressure Coupler (22) and Blue Low Pressure
Coupler (23) counterclockwise to close and remove the Couplers from the A/C
system.
10. Use care when disconnecting the Control Valves from the A/C system service fittings,
the hoses may contain some residual refrigerant.
FIGURE 1
Blue Low Pressure Gauge (5)
Blue Thumb Handle (11)
Blue Low Pressure Coupler (23)
Control Valve
Blue Refrigeration
Low Pressure
Hose (19)
Red High Pressure Gauge (3)
Red Thumb Handle (11)
Red High Pressure Coupler
(22)
Control Valve
Red
Refrigeration
High Pressure
Hose (17)
Yellow Refrigeration
Charging Hose (18)
(connect to both branches
of T-fitting (16))
Manifold Body (2)
REV 05f, 09i
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