Kubota M6800S Workshop Manual page 559

M6800 · M6800S · M8200 · M9000, WSM
3. AIR CONDITIONER SYSTEM
The air conditioner system operates using R134a refrigerant.
NOTE
• There are three types (Type 1, Type 2 and Type 3) of air conditioner system that is devided by serial number
as below.
• As for air conditioner system of type 2 and type 3, the compressor changes from swash plate type to scroll
type and the blower high relay is newly adapted.
Model
M6800SQ
M6800SDTQ
M8200Q
M8200DTQ
M8200HDQ
M9000Q
M9000DTQ
M9000HDQ
[1] PRINCIPLES OF AIR CONDITIONER
(1) Expansion and Evaporation
Type 1 (Swash plate
type compressor)
Below 20892
Below 63129
Below 10798
Below 53142
–
Below 10913
Below 54965
–
Serial Number
Type 2 (Scroll type
compressor)
20893 to 21578
63130 to 65762
10799 to 11018
53143 to 54363
Below 54287
10914 to 11322
54966 to 58436
Below 58281
In the mechanical refrigeration system, the cool air is
made by the following methods.
1. The high temperature and high pressure liquid
refrigerant is stored in the container which is called
receiver (1).
2. Then, the liquid refrigerant is released to evaporator
(3) through a small hole, called expansion valve (2).
At this time, temperature and pressure of the liquid
refrigerant are lowered too, and some of the liquid
refrigerant is changed to vapor.
3. The low temperature and low pressure refrigerant
flows into the container, called evaporator. In the
evaporator, the liquid refrigerant evaporates and
removes heat from the surrounding air.
(1) Receiver
(2) Expansion Valve
10-M33
Type 3 (New scroll
type compressor)
Above 21579
Above 65763
Above 11019
Above 54364
Above 54288
Above 11323
Above 58437
Above 58282
(3) Evaporator
(4) Pump
KiSC issued 03, 2008 A
CABIN
W1015704
W1014127