Takeuchi TL150, Workshop Manual

Page: 135 / 312

III-92
Excessive Air and/or Moisture in the System
Tip: There may be occasional bubbles in the sight glass. Air
from vents in the cab is only slightly cool.
Cause: System contains excessive air and/or moisture.
Repair Procedure:
Test for leaks, recover refrigerant from the system and re-
pair the leak. Depending on the type of system, replace the
receiver-drier or accumulator. The desiccant is saturated
with moisture. Check and replace any compressor oil lost
due to leakage. Evacuate and recharge the system, then
check AC operation and performance.
Expansion Valve (TXV) Stuck Closed or Plugged
Tip: Air from vents in the cab is only slightly cool. The expan-
sion valve body is frosted or sweating.
Manifold Gauge Set Readings
Figure 8-9
Gauge reading, expansion
valve (TXV) stuck closed.
Figure 8-8
Gauge reading, excessive
air and/or moisture in the
system.