I've been doing other customers work lately but I have a paving roller I am breaking down today for the asphalt side.
Yesterday I went out on a customer's Cat 320D excavator. I was informed that they had installed a new a/c compressor, condenser, expansion valve, and receiver on the machine but never could get the vent temp under 68 degrees. After a few questions I realized they really didn't know much about a/c and how it works so off I went to the machine. When I get there, I hooked up my gauges and asked the operator to fire the a/c up. Almost immediately I heard the belt squall, and it would every time the compressor cycled. I asked the operator when that started, and he replied since they had done the replacement parts. The gauge readings were crap. I remove a panel under the engine to attempt to tighten the loose belt.........no go.
The adjust screw was bent and locked up in the pulley shaft. Replaced that, got the tension correct, then drained and re vacced. Got perfect pressures and a vent temp of 47 degrees. They probably replaced all those parts for nothing.
Yesterday I went out on a customer's Cat 320D excavator. I was informed that they had installed a new a/c compressor, condenser, expansion valve, and receiver on the machine but never could get the vent temp under 68 degrees. After a few questions I realized they really didn't know much about a/c and how it works so off I went to the machine. When I get there, I hooked up my gauges and asked the operator to fire the a/c up. Almost immediately I heard the belt squall, and it would every time the compressor cycled. I asked the operator when that started, and he replied since they had done the replacement parts. The gauge readings were crap. I remove a panel under the engine to attempt to tighten the loose belt.........no go.
The adjust screw was bent and locked up in the pulley shaft. Replaced that, got the tension correct, then drained and re vacced. Got perfect pressures and a vent temp of 47 degrees. They probably replaced all those parts for nothing.