AC compressor straight wired?

Got a question, company sidestepped having to replace an APADS fan/ac compressor modulator ( apparently it's an expensive additional piece added to this Kenworth T400 to make the fan and ac compressor work more efficiently) buy basically straight wiring the AC compressor clutch to a switch in the cab. Now coolant levels doing damage to the compressor aside, if this thing is turned on and left on for too long, can it do damage to the compressor? I already know if the coolant levels are too low , and the compressor continues to try to run it will burn itself up... but what if the AC compressor clutch just plain stays kicked in and turning for too long?

 

Just an old Detroit built back in 99. I already know the compressor can seize up if there is little or no coolant in the system. My question is will it seized up if there is adequate coolant but the compressor stays locked in and running for too long. There's no automatic kick in and out for the clutch. It's all based off of a manual switch in the cab because they bypassed all the expensive electronic sensors that automate that process.

 

Because I respect the owner and the parts $2,300. It's a local family-owned Trucking line and they don't honestly make that much money.

 

It's slowly losing its ability to cool rapidly, so that's either a minor coolant leak or the compressors wearing itself out ( which was the question that gave rise to me asking the form question, am I accelerating the compressors wear and tear?). Reaching under the steering wheel to turn the compressor switch off and give the pressure time to equalize is aggravating as hell.. but I do it as often as I can given the mental load of trying to drive a feed truck at night on rough secondary roads and pay attention to not Wrecking. Isn't terribly easy on an almost 20 year old chassis with worn-out shocks, steering components, Etc.

 

thanks. I have to run the engine fan manually at all times, somehow that keeps coolant cycled through the compressor. Found out the hard way that they had bypassed basically all of the AC system self check functions, because that overpressure valve actually did blow once when the engine fan was turned off. Had to go and have coolant filled back into the system. They told me that I would have to turn the switch on to get the AC compressor clutch to engage, but they neglected to tell me that the engine fan ( and whatever other pumps engage in conjunction with that for the AC system) will not engage automatically at the proper times to cycle the coolant.