Takeuchi TL150, Workshop Manual

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III-72
You can feel for oil at the bottom of all connections (see Figure 7-4) if the system
is not too hot. Of course, a few minutes with an electronic leak detector is the
best way to check for leaks. Keep in mind that pressure is different in a system at
rest, so small leaks may be hard to find. Pressure in a system at rest, will equalize
at from 60 to 95 PSI, depending on outside air temperature. This means there is
more pressure in the low side of the system at rest than during normal system
operation. Just the opposite is true of the high side; at rest, high side pressure is
lower. You may want to use the detector to check for leaks in the high side when
the air conditioner is operating, if you suspect a leak and can
·
t find it when the
system is at rest.
Electrical System Inspection
The two stages of an electrical inspection are explained in more detail below:
1.
Inspect Electrical Connections
2.
Check Electrical Current Flow and Device Functions
Use the following procedures to perform an electrical system inspection:
1. Inspect Electrical Connections
First, while you are making your visual inspection under the hood (cab) and/or at
the roof top condenser, take a moment and check all electrical connections visu-
ally and by feel. Look for any corrosion on leads or connectors and clean them.
Make sure all leads and wires are properly supported and securely connected.
2. Check Electrical Current Flow and Device Functions
Perform the following steps to check current flow and electrical device func-
tions:
A. Turn the Ignition On – To check current flow the ignition must be on.
Electrical System Inspection
Figure 7-4
This illustration shows a po-
tential refrigerant leak point
at the condenser fitting.