Engine Size: Big'un
Refrigerant Type: R134A
Ambient Temp: 80
Pressure Low: n/a
Pressure High: n/a
Country of Origin: United States
The compressor on this crane I believe is a zerex. it is turned by a hydraulic pump. the problem is that when you turn on the A/C the compressor turns very slow. the hyd. pump is not binding, you can turn it easily when the a/c is off. I plan on bringing my gauges from home and take a static reading, but have not done so yet.
Could you guys give me some direction on where to start troubleshooting? I sure would appreciate it. Thx.
That would be a hydraulic motor. Depending on the type (gear, vane, geroler, gerotor, etc.) it may or may not turn free. I would confirm the operation of the hydraulic system and be sure there is not a pressure problem or motor wear on the hydraulic side; as this would cause the slow turn of the A/C compressor.
Thx Hecat. I will check into that first. It only has 300 hrs on the crane and some of that not in the summer, but you never can tell.
Compressor is probably a Zexel which is basically the Seltec. They work best at about 1500 rpm but will work as low as 800 rpm.
zexel- I think that was it- was going by memory.... the guy that usually runs the crane said to look at it, isn't working. so I did, but only at idle. When I get time I will look at it with the rpm's in the correct range....thats good info, thanks!
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