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I purchased an 89 F350 460 EFI factory air. The air worked fine for the first 6 hour on the drive home then It just stopped blowing cold. When I got home I saw the air gap on the clutch was quite wide so I took the washers out, still was too wide. I could only get the clutch to pull in if I tapped it in by hand and it only stayed in for a short time. This was all last fall.
Today I replaced the clutch, compressor and drier, took it in and had it charged. They replaced the pressure switch because the compressor cycle on and off. Even after replacing the switch it still cycles on and off and I still have no air! They removed some of the charge but still no air. The clutch pulls in and runs for 2 sec every 15- 20 seconds. I assume the reason it cycles is a high pressure.
Need some help, what should I be looking at now?????
Actually quick cycling usually is because it is undercharged... Check your low pressure gauge, when it drops much below 28# the clutch will drop out until the pressure climbs back up into 32 # or so, then the clutch kicks in again..
Actually quick cycling usually is because it is undercharged... Check your low pressure gauge, when it drops much below 28# the clutch will drop out until the pressure climbs back up into 32 # or so, then the clutch kicks in again..
Thanks for the info. I should be able to add 134 from home now that the system has the initial charge correct?