97 F150 AC question
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Senior User
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From: Cranbrook,BC Canada
97 F150 AC question
Last winter,my AC compressor piled up...I swapped it out for another pump,but I didn't hook the lined back up to it right away...I did however cut the lines off of the block part that bolts to the pump,folded the ends over and welded them up.
I hooked up the new lines yesterday, after I had changed O-rings and such and put a new accumulator(aluminum can) on it.....can I recharge this system with the do it yourself kit,or does the entire system need to be evacuated and then redone by the pros.......
I am not sure if I got a "dud" pump or not as it does not appear to be kicking in at all...could it be the cycling switch on the accumulator or does have anything to with pump at all?
I hooked up the new lines yesterday, after I had changed O-rings and such and put a new accumulator(aluminum can) on it.....can I recharge this system with the do it yourself kit,or does the entire system need to be evacuated and then redone by the pros.......
I am not sure if I got a "dud" pump or not as it does not appear to be kicking in at all...could it be the cycling switch on the accumulator or does have anything to with pump at all?
Hotshot
Joined: Jan 2004
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From: St Louis
The system should be evacuated to remove air and moisture and to check for leaks.
The compressor cannot be actuated until the pressure reaches a minimum of 45 psi.
If you're charging into a vacuum, the first pound or so will jump right in on its own. Once the pressure in the system equalizes with the supply, there's usually enough pressure in the system to activate the cycling switch and the compressor. The compressor will then suck in additional refrigerant until the system is correctly charged.
The ONLY way you can correctly charge a system with one of the el-cheapo kits is to charge specifically by the weight of the charge. The low-side only gauge is completely worthless for getting the charge level correct.
Steve
The compressor cannot be actuated until the pressure reaches a minimum of 45 psi.
If you're charging into a vacuum, the first pound or so will jump right in on its own. Once the pressure in the system equalizes with the supply, there's usually enough pressure in the system to activate the cycling switch and the compressor. The compressor will then suck in additional refrigerant until the system is correctly charged.
The ONLY way you can correctly charge a system with one of the el-cheapo kits is to charge specifically by the weight of the charge. The low-side only gauge is completely worthless for getting the charge level correct.
Steve
Fleet Mechanic
Joined: Feb 2006
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From: Lorain County, Ohio
If that compressor failed internally (piled up?) you will need to flush the system and replace the orifice also, at the very least.
The condenser should also be replaced because it's design doesn't lend itself well to flushing. You've got a 50/50 chance of debris being trapped in the condenser and causing another compressor failure later.
The condenser should also be replaced because it's design doesn't lend itself well to flushing. You've got a 50/50 chance of debris being trapped in the condenser and causing another compressor failure later.
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From: Cranbrook,BC Canada
Originally Posted by lsrx101
If that compressor failed internally (piled up?) you will need to flush the system and replace the orifice also, at the very least.
The condenser should also be replaced because it's design doesn't lend itself well to flushing. You've got a 50/50 chance of debris being trapped in the condenser and causing another compressor failure later.
The condenser should also be replaced because it's design doesn't lend itself well to flushing. You've got a 50/50 chance of debris being trapped in the condenser and causing another compressor failure later.
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
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From: Lorain County, Ohio
Originally Posted by supertruck
Actually it had clutch problems,I beleive the bearing on the pulley mucked up,and casued all kinds of trouble after that.....I was just gonna swap out the pulley and the clutch with an autowrecker setup,but the pump shaft was gouged and wore too bad in front of the snap ring to get the pulley off,so I ended up just changing the entire pump...what a pain in the butt that was
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From: Cranbrook,BC Canada
Originally Posted by lsrx101
Aah, OK. You should be ok as far as debris then. You need the get the system evacuated and recharged ASAP. That new accumulator is sucking up moisture all of the time the system is at atmospheric pressure and there's air in the system. You'll also need to add about 4 ounces of oil to make up for what was lost in the old compressor and accumulator.
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