Doug580l
Senior Member
I've had my Bobcat E50 to the dealer twice trying to get the air conditioner to work properly. So far there's been very little change. The machine has a little over 100 hours on it. I don't know a whole lot about ac's.
The low side is at about 20 psi and the high side at best is 170 psi. Before it was brought in the first time, I added about 8oz. of refrigerant. It made no difference to the pressure readings or the temperature at the vents. According to the service manual the temperature at the vents should be between 36 and 53 degrees, depending on humidity. And the pressure readings at ambient air temperature of 86 to 101 degrees should be: Low side 15-33 psi and High side 210-265 psi.
When it was being serviced the first time they said that everything was fine and it was blowing 60 degrees out the vents which it was but that's not cold enough to keep the machine comfortable. I then checked the pressure readings and they were off so I had it serviced again. I also told them what the service manual says regarding vent temperature.
Before it was brought in the second time I told the service guy that the High side pressure was too low.
I also told them what the service manual says regarding vent temperature.
When I got it back yesterday he said they put it on the ac machine and pressure was where it's supposed to be and they checked everything out. Put a dye in and no leaks. They said a water drain line was clogged and now it works better. It doesn't. High side pressure is still low and it's maybe a couple degrees colder at the vents.
Any ideas what's wrong? I've tried searching the web and can't seem to come up with a low pressure side low or normal and high pressure side low scenario other than low refrigerant which they claim they removed it, vacuumed the system and put the proper amount in, twice now.
Thanks,
Doug
The low side is at about 20 psi and the high side at best is 170 psi. Before it was brought in the first time, I added about 8oz. of refrigerant. It made no difference to the pressure readings or the temperature at the vents. According to the service manual the temperature at the vents should be between 36 and 53 degrees, depending on humidity. And the pressure readings at ambient air temperature of 86 to 101 degrees should be: Low side 15-33 psi and High side 210-265 psi.
When it was being serviced the first time they said that everything was fine and it was blowing 60 degrees out the vents which it was but that's not cold enough to keep the machine comfortable. I then checked the pressure readings and they were off so I had it serviced again. I also told them what the service manual says regarding vent temperature.
Before it was brought in the second time I told the service guy that the High side pressure was too low.
I also told them what the service manual says regarding vent temperature.
When I got it back yesterday he said they put it on the ac machine and pressure was where it's supposed to be and they checked everything out. Put a dye in and no leaks. They said a water drain line was clogged and now it works better. It doesn't. High side pressure is still low and it's maybe a couple degrees colder at the vents.
Any ideas what's wrong? I've tried searching the web and can't seem to come up with a low pressure side low or normal and high pressure side low scenario other than low refrigerant which they claim they removed it, vacuumed the system and put the proper amount in, twice now.
Thanks,
Doug