Hi folks,

I'm a new user, and have recurring issues with Carrier 5H86 HVAC compressors.

In my case, we have 8 cylinder units, and have encountered problems with the unloader forks breaking and/or the cotter pins which hold the pin in place which secures the unloader fork breaking, with the subseqent failure of that connection.

The units are operated in 30 day intervals - we have two trains, A which runs for 30 days, then we shift to the B system and run it for 30 days. We believe we have some slugging going on, and have taken steps to pump down the compressors on shutdown to help reduce the potential.

We have also installed the Carrier oil cooler modification. We are running with Mobil Gargoyle 300 oil.

Questions:
1. Has anyone encountered this issue? (cotter pins falling out / breaking on unloaders)
2. Do you have any suggestions on what we can do to eliminate this issue?

Please advise. We have tried to solve this one without success, and we keep having problems.

5H86User