Takeuchi TB175W, Руководство по ремонту

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III-77 TB175W
Before adding refrigerant to the system you should study the sight glass
while the engine is running and the air conditioner is on. Even if you found
a leak during the system inspection and corrected it, you have no way of
knowing how much refrigerant has leaked. You will not be able to tell how
much refrigerant is in there, but you can see if bubbles are present.
Then check the gauges for unusually high or low readings, or a lack of
pressure. Following this procedure, and using your knowledge and experi-
ence, decide if it is safe and makes sense to add refrigerant in order to make
your full performance inspection.
You are now ready to add refrigerant to the system. For your safety and to
prevent system damage use the following procedure.
1. Turn on the engine and set the idle at 1200 to 1500 RPM and
then turn on the air conditioner.
Do not open the high pressure hand valve on the manifold
gauge set. The compressor could pump refrigerant into
the container and cause it to BURST. Be sure to keep the
refrigerant container upright to prevent liquid refrigerant
from entering the compressor.
2. Open the refrigerant dispensing valve on the container and then
the low pressure hand valve on the manifold. This allows refrig-
erant to enter the system as a gas on the low pressure or suction
side of the compressor. The compressor will pull refrigerant into
the system.
Troubleshooting & Service Procedures
CAUTION
Figure 8-4
In this illustration we have
noted how refrigerant is
added to the air conditioner.