Im replacing ac compressor on 07 f150,do i just install it reconnect lines and charge it or is there special steps to it

 

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Welcome to FTE.

First off, have you determined what caused your other compressor to go bad?

Anyway, once the compressor is replaced and the system has been sealed, you need to pull a vacuum on the system using a vacuum pump. This will aid in removing the microns of debris in the system, remove the air/moisture and if the system holds a vacuum for a spell, it will hold pressure.

 

Man i have changed the compressor,the orfic tube,clutch relay,low pressure switch,and the damn conpressor still wont kick on,it has power going to it,if i jump it it will cycle on but thats the only way,bout ready to put it in the river and start over,any other ideals will be greatly appreciated

 

The compressor probably won't come on until the system is charged. Most of them have a pressure switch.

 

99% of the vehicles out on the road has a low pressure cycling switch. This will prevent the compressor from coming in till it sees atleast 35 PSI in the system. Without refrigerant the compressor will not engage. Engaging the compressor manually with no refrigerant in it while the engine is running is very bad as no refrigerant oil is being pumped through the compressor. This is a surefire way of burning up a compressor.

The steps to an AC compressor swap is as follows.

1) Evacuate refrigerant if any in system
2) Remove old compressor. Measure refrigerant oil out of old compressor.
3) Remove new compressor from box, measure refrigerant oil level in new compressor. Replace same amount plus extra if more came out of old compressor. Its also good idea to read the instructions on the compressor cause some vehicles will tell you to leave it alone if less than x amount of oil came out of old compressor.
4) Disconnect high side line at orifice tube and remove orifice tube
5) Flush system out with A/C flush.
6) Install new Accumulator plus adding refrigerant oil amount that came out of old one and orifice tube
7) Install new compressor and spin compressor clutch plate over by hand at least 20 full revolutions. This pumps excessive oil out of the compressor into the system to prevent damage or high head pressure on initial start up.
8) vacuum system down for atleast 20 - 30 minutes. Let sit for another 30 minutes to check for any drop in vacuum.
9)If no drops were found now is the time to add refrigerant dye if you choose to and to charge your system based off the specs noted on the AC decal under the hood.

While you can use a manifold gauge set, it is hard to be sure you are putting the exact amount you need without using a scale. If you dont have a recovery/charge machine the next best thing is to get a digital A/C scale set your 30 lb refrigerant can on and take note of the weight and add till you remove the amount you need.

This is the only real correct way to do it. But you can cut corners if you choose to, doesnt mean you will have a reliable system though.