A/C compressor

[labill]

I have a 2011 Ford with 2012 Newmar Bay Star coach and the A/C compressor is bad. Has anyone changed out the compressor and what am I looking at.

Thanks,
labill

 

[MrJP]

Just nuts and bolts and bloody knuckles and lots of cussing . I would also change the dryer.

 

[Kevin D Pem]

Just nuts and bolts and bloody knuckles and lots of cussing . I would also change the dryer.

Always a dryer. Also evaluating the lines and cost of refrigerant. If you don't have the equipment, you will be hiring the work and paying for markup on that refrigerant (the most profitable part of the job).

 

[Chuggs]

Recovery unit and tank to recover all the refrigerant, fresh catch-all filter for your recovery unit. Guage set to connect. Whip hose from recovery unit to tank.

When you are empty... release the drive belt from the pully, disconnect the electrical connection, disconnect two refrigerant hoses and plug them to keep dirt and debris out, unmount the compressor.

Open the oil port and pour the contents into a measuring cup.

Take new compressor. Check labels...do they both use the same OIL spec? Either way...pour the oil out of the new compressor...if the same, return enough to equal the volume you removed from the old compressor + 1 oz for new filter drier. If not obtain the oil speced for your system measure an equal amount as what you got out of the old compressor + 1 oz for new filter drier and add it to the new compressor, close it up. Mount it, add hoses, use PAG lubricant on threads and new o-rings. Drive Belt. Electrical connection.


Up front...remove filter drier and replace. Use new o-ring and PAG on o-ring and threads. Our 2016 uses a std . HNBR a/c o-ring on one side, but a SAE12 on the other side. Grabbing some kits from Harbor freight is a good idea. They have a kit with A/C sized HNBR and also a Viton kit with SAE 12 size. (I don't know if your coach uses that type of fitting)

Ideally, pressurize system with dry nitrogen and check for leaks.

Draw vacuum with vacuum pump.

Use a scale to keep track of the refrigerant put back Into system. There should be a weight label on the evaporator housing. Otherwise your guessing with pressure measurments.