Takeuchi TB175, Operator'S Manual, Page: 217 / 231

214
OPTIONS
If the air conditioner does not function
If the air conditioner does not cool or heat the air, set the fan switch to OFF and contact a
service outlet for inspection and/or repairs.
IMPORTANT: Continued use of the air conditioner when it is not functioning properly
may damage its various parts.
IMPORTANT: Using the air conditioner when there is no refrigerant will damage the
compressor. Be particularly careful not to do this.
IMPORTANT: Always have a service outlet add or replace the refrigerant. Be sure to
use R134a refrigerant (800g or 1.76 lb).
Air Conditioner
Sight glass (refrigerant)
High/low pressure pipe
temperature
Pipe connection
Normal Almost transparent, with
some bubbles, but fully
transparent when the engine
speed is increased or
decreased. High pressure pipe (1) hot
(80 to 120
°
C (176 to 248
°
F)),
low pressure pipe (2) cold
(8 to 15
°
C (46 to 59
°
F)).
Clear difference in
temperature between the
pipes.
No irregularities.
Refrigerant
low
Flow of bubbles can be seen
constantly. Refrigerant is
sometimes transparent or
has white bubbles.
Refrigerant may be leaking. High pressure pipe warm,
low pressure pipe somewhat
cool. No great difference in
temperature between the
pipes. Some oily
places.
Almost no
refrigerant
Some mist-like refrigerant
can be barely seen flowing.
Refrigerant has leaked, and
almost none is left. Almost no difference in
temperature between the
high and low pressure pipes. Some heavily
oily places.
Excess
refrigerant
No bubbles can be seen,
even when the fan is set to
high and the engine is idling. High pressure pipe is hot,
low pressure pipe is
somewhat cool.
There is a difference in
temperature between the
pipes. No irregularities.
Condition of the refrigerant