Troubleshooting From Problem Symptoms (Except Refrigeration Cycle Troubles); Connecting The Pipes; Replacing The O-Rings; Charging Compressor Oil In Replacing The Functional Parts - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
c. Troubleshooting from problem symptoms (except refrigeration cycle troubles)
You will find the troubles easily using the table below. For details, refer to each troubleshooting chart.
No. Problem
1 Fuse is blown out easily
2 No blower operation
3 Blower speed does not change
5 No compressor operation
6 A/C lamp does not light
A/C lamp flashes.
7
(only for compressor with lock sensor)
8 No A/C operation (No cool air comes out)
Room temp. does not decrease (insuffi-
9
cient cooling)
10 No warm air comes out
ote : 1 : Sensors are thermistor, pressure switch and water temp. switch.
d. Connecting the pipes

(1) Replacing the O-rings

Replace the O-rings with new ones (for R134a and R12). Use a toothpick for removing the old O-rings.
When connecting the pipes, be sure to apply compressor oil to them.
Tighten the connections to their specified torques.
Connection Tube size or bolt size
8 pipe
1/2 pipe
Nut
5/8 pipe
M6 bolt (4T) at receiver
Block joint
Other M6 bolts (6T)
Compressor oil (spray type): ND-OIL8 (995500-0300)

(2) Charging compressor oil in replacing the functional parts

Oil charge 40 cc
Compressor: Charge the same amount of oil as that of the old compressor.
Compressor oil:ND-8 for the scroll (SCS) and swash plate types
ND-OIL9 for the vane (SV) type
ote : An open oil container is easy to absorb moisture from the air. Close the lid immediately after use.
Condenser Evaporator
40 cc
Main Inspection Areas
Blower motor, Blower resistor, Blower
switch
Blower resistor
Blower switch
Magnetic clutch
A/C switch
A/C switch
Compressor, V-ribbed belt
Magnetic clutch
Engine coolant volume,
A/C temp. control lever Heater radiator
Tightening torque
12 15 N m (120 150 kmf/cm
20 25 N m (200 250 kmf/cm
30 35 N m (300 350 kmf/cm
4.0 7.0 N m (40 70 kmf/cm
8.0 12.0 N m (80 120 kmf/cm
Receiver
10 cc 10 cc (scroll)
20 cc (swash plate type)
VI-S-10
VI Air Conditioner
Others
relay Compressor
2
)
2
)
2
)
2
)
2
)
Pipes
Refer
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