Kubota KX080-4 Workshop Manual page 473

KX080-4, WSM
Manifold gauge connections and vacuuming
1. Close the high-pressure (HI) and low-pressure (LO) valves of
the manifold gauge.
2. Connect the L-shaped side of 2 charging hoses to quick joints
and connect them to the compressor and receiver service
valves.
Low-pressure side
Blue hose
(L mark)
High-pressure side
Red hose
(H mark)
3. Connect the charging hose (green) in the middle of the manifold
gauge to the vacuum pump.
4. Open the high and low pressure valves of the manifold gauge.
5. Turn the vacuum pump switch on and vacuum the line until the
low-pressure gauge reaches a reading of approximately
–0.1 MPa (–750 mmHg). (about 15 minutes)
6. Once about –0.1 MPa (–750 mmHg) is reached, close the high
and low pressure valves of the manifold gauge and stop the
vacuum pump.
7. Let it set for at least five minutes and check to make sure the
indicator needle of the low-pressure gauge does not approach
0.
8. If the needle of the gauge approaches 0, the system's
airtightness is compromised somewhere, so after inspecting
and repairing the line connections, run the vacuum again and
check to make sure there are not any places that are not airtight.
(1) Vacuum Pump
(2) High-Pressure Valve
(3) Low-Pressure Valve
(4) High-Pressure Side (H Mark)
(5) Low-Pressure Side (L Mark)
Connections with a refrigerant collector or service canister
1. Close the high-pressure (HI) and low-pressure (LO) valves of
the manifold gauge.
2. Connect the charging hose (green) connected to the vacuum
pump to the collector or service canister. (Air is in the charging
hose, so do not open the high or low pressure valves.)
3. Discharge from the collector or open the service canister's
valve.
4. Press on the valve core of the manifold gauge for three to five
seconds to discharge any air from the hose.
(1) Service Canister Valve
(2) High-Pressure Valve
(3) Low-Pressure Valve
(4) High-Pressure Side (H Mark)
(5) Low-Pressure Side (L Mark)
5-S16
(A) Inspection Line Connections
(B) Low-Pressure Gauge
(a) Valve Settings
(L: Closed, H: Closed)
(b) Leave for at Least Five Minutes
(c) If the Needle Approaches 0,
Inspecting and Repairing the Line
Connections.
RY9212001CAS0029US0
(a) Press Valve Core to Expel Air
RY9212001CAS0030US0
KiSC issued 08, 2015 A
CABIN