Kubota WSM L3560, Workshop Manual

Page: 756 / 801

CABIN
L3560, L4060, L4760, L5060, L5460, L6060, WSM
10-S13
5. CHECKING AND CHARGING REFRIGERANT
CYCLE
[1] CHECKING WITH MANIFOLD GAUGE
IMPORTANT
• The gauge indications described in the following testing are those taken under the same condition, so it
should be noted that the gauge readings will differs somewhat with the ambient conditions.
Condition
• Ambient temperature: 30 to 35 °C (86 to 95 °F)
• Engine speed: Approx. 1500 min
-1
(rpm)
• Temperature control lever: Maximum cooling position
• Air-Conditioner switch:
ON
• Blower switch:
HI
position
9Y1210824CAS0030US0
Manifold Gauge Connecting and Test Preparation
1. Close the manifold gauge
HI
and
LO
pressure side valve (4), (5)
tightly.
2. Connect the charging hose (7) (red) to the
HI
pressure side
charging valve (2) and connect the charging hose (1) (blue) to
the
LO
pressure side charging valve (6).
NOTE
• Be sure to drive out the air in the charging hoses at the
manifold gauge connection end by using the refrigerant
pressure in the refrigerating cycle.
3. Start the engine and set at approx. 1500 min
-1
(rpm).
4. Turn on the A/C switch and set the temperature control lever to
maximum cooling
position.
5. Set the blower switch to
HI
position.
9Y1210824CAS0031US0
Normal Operating
If the refrigerating cycle is operating normally, the reading at the
LO
pressure side (1) should be generally by around 0.15 to 0.2 MPa
(1.5 to 2.0 kgf/cm
2
, 21 to 28 psi) and that at the
HI
pressure side (2)
around 1.27 to 1.66 MPa (13 to 17 kgf/cm
2
, 185 to 242 psi).
9Y1210824CAS0032US0
(1) Charging Hose (Blue)
(2)
HI
Pressure Side Charging Valve
(3) Manifold Gauge
(4)
HI
Pressure Side Valve
(5)
LO
Pressure Side Valve
(6)
LO
Pressure Side Charging Valve
(7) Charging Hose (Red)
Gas pressure
Factory
specifica-
tion
Low pressure
side
0.15 to 0.20 MPa
1.5 to 2.0 kgf/cm
2
21 to 28 psi
High pressure
side
1.27 to 1.66 MPa
13 to 17 kgf/cm
2
185 to 242 psi
(1)
LO
Pressure Side (2)
HI
Pressure Side
KiSC issued 03, 2016 A