15-3. AIR CONDITIONING SYSTEM SERVICING (CONT)
a. Manifold Gage Set Installation.
Turn high pressure gage valve (2) and
low pressure gage valve (1) on gage set (3)
clockwise to their front seated (closed)
Remove two dust caps (8) from service
valve ports (6) and (7).
Make sure hand valves on manifold
gage set are in closed position
during connection, and hoses are
clear of any moving parts in engine
compartment. Injury to personnel or
damage to equipment may result.
Connect low pressure gage hose (5) on
manifold gage set (3) to suction (low side)
service valve port (6).
Connect high pressure gage hose (4) on
manifold gage set (3) to discharge (high
side) service valve (7).
Hang manifold gage set (3) so that
hoses (5) and (4) are well away from
moving engine parts.
Do not perform step (6) if system is
already evacuated. High and low
pressure hoses must be purged with
refrigerant for charging purposes
(refer to task e.).
Loosen low pressure gage hose (5) and
high pressure gage hose (4) at manifold
gage set slightly for a second to purge air
from hoses, and then tighten.