Mityvac 04700 AirEvac - Manual (Page 5)

Page Number - 5 Form 823538
Figure 4
13. Watch the gauge for at least 30
seconds. It will maintain the 24 to 26
in. Hg (81 to 88 kPa) reading if the
system does not leak.
14. Follow the procedures below to prop-
erly refill the cooling system before
relieving the vacuum from the system.
Refilling the cooling system
1. Follow the procedure above to evacu-
ate and check the cooling system for
leaks. If the system has a leak, repair
it and re-evacuate the system.
2. With a vacuum of 24 to 26 in. Hg (81
to 88 kPa) on the system, connect the
Coolant Hose Assembly to the Cool-
ant System Adapter Assembly. (See
Figure 4.)
3. Submerse the free end of the coolant
hose into a supply of coolant. Ensure
there is enough coolant to refill the
system, or air will be pulled back into
the system, and the system will not fill
to the proper level.
4. Open the flow control valve on the
Coolant System Adapter Assembly,
and the system will refill with coolant.
5. When the vacuum gauge reading
reaches zero (0), the cooling system
is full.
6. Remove the Cooling System Adapter
from the radiator or expansion tank
by turning the tension knob counter-
clockwise.
7. Start the engine and allow it to reach
operating temperature.
8. Top-off the coolant level in the radia-
tor or expansion tank as required, and
reinstall the cap.