A/C Pressure Switch - Kubota M108S Workshop Manual

M108S, WSM

(11) A/C Pressure Switch

HI Pressure Side
1. Connect the manifold gauge (5) to compressor as following
procedure.
Close the HI and LO pressure valves (3), (4) of manifold gauge
tightly, and connect the charging hoses (red and blue) (6), (7) to
the respective compressor service valves.
HANDLING OF SERVICE TOOLS" in this section.)
NOTE
• Be sure to blow out the air in the charging hoses at the
manifold gauge connection end by utilizing the refrigerant
pressure in the refrigerant cycle.
2. Start the engine and set at approx. 1500 min
the A/C switch, then set the blower switch to HI position.
3. Raise pressure on the HI pressure side of the refrigerant cycle by
covering the condenser front with a corrugated carboard, and the
pressure switch (8) is activated and the compressor magnetic
clutch is turned off. At this time, read the HI pressure gauge of
the manifold gauge. If this pressure reading differs largely with
the setting pressure, replace the pressure switch with a new one.
Factory
Setting Pressure
spec.
(1) HI (High Pressure Side) Charging
Valve
(2) LO (Low Pressure Side) Charging
Valve
(3) HI Pressure Valve
(4) LO Pressure Valve
10-S29
(Refer to "[1]
−1
(rpm). Turn on
More than
Pressure
approx. 3.14 MPa
switch
32.0 kgf/cm
OFF
455 psi
(5) Manifold Gauge
(6) Charging Hose (Blue)
(7) Charging Hose (Red)
(8) Pressure Switch
(9) Air Conditioner Unit
W1044875
KiSC issued 06, 2007 A
CABIN
2