York Compressor Problems

[Seth_O]

I just finished a York OBA installtion in my '40. For the most part I am pleased with it, it was cheaper and easier than I expected.

When I got the system fired up and tried filling the tank however, I ran into an issue.

I can get ~40lbs into tank and then the compressor seems to back up, the pulley stops and the belt slips. I drained the air from the system and got the same result the 2nd time.

I have a one-way valve right after the compressor, so not sure how the system pressure would be causing an issue, and the posts I read from folks that have these all said they put out tons of air and lots of pressure, doesn't seem like 40lbs could back it up?

Compressor is mounted upright, and has ~8ozs of air compressor oil in it.

Any thoughts?

 

[Pin_Head]

How much belt engagement do you have? You need at least 90 degrees of wrap.
Is the clutch slipping?

 

[Seth_O]

The belt covers a good 75% of the pulley. Not sure how to check if the clutch is slipping, doesn't seem like it as the whole pulley mechanism slows to a stop and the belt slides on the pulley. Brand new belt. If I rev the RPM's it will still spin, but disproportionate to the amount of spin coming from the crankshaft.

 

[cardinal fang]

~8oz of oil seems like a lot oil for a York. I am pretty sure mine didn't take half of that.

 

[Seth_O]

~8oz of oil seems like a lot oil for a York. I am pretty sure mine didn't take half of that.

How did you measure your vol of oil to know if it was full? Did you use the dipstick method or some other way?

 

[Pin_Head]

If the clutch is slipping, it would look just like it does when you turn off the magnetic clutch: The outer ring of the pulley will spin while the center section is stopped.
Does it run OK when you disconnect the air outlet?

 

[Seth_O]

If the clutch is slipping, it would look just like it does when you turn off the magnetic clutch: The outer ring of the pulley will spin while the center section is stopped.
Does it run OK when you disconnect the air outlet?

It did fine for the test run, but that was only at idle and for about 15mins. I'll disconnect the hose on Monday and see how it does and post up the results.

 

[Seth_O]

Update: I ran the compressor venting into atmosphere and it purred along just fine. I then hooked it up to a manifold with a pressure gauge. The pressure would spike up to ~40lbs, the pulley would sieze up and the squealing would start. Then the pressure would drop down and begin rebuilding. Process repeat ad nauseam. No slippage apparent from the clutch.

I have NO experience with York compressors and could use some help.

 

[EWheeler]

Would you mind posting some pics of how you mounted your York please? Did you fab your own bracket or use Mudrack's? In the middle of this now and have fabbed my own bracket, but need to find a new location for my alternator as I only have 20 degrees or so of engagement on the York pulley with the current arrangement. Thanks,

Evan

 

[Seth_O]

Would you mind posting some pics of how you mounted your York please? Did you fab your own bracket or use Mudrack's? In the middle of this now and have fabbed my own bracket, but need to find a new location for my alternator as I only have 20 degrees or so of engagement on the York pulley with the current arrangement. Thanks,

Evan

I really like my mouning system, the only caveat to it is that it uses the PS pump (mounted below the compressor, unseen in the pic's) as the belt tensioner. Since I have minitruck PS, the pump is pretty small and it left room for the York uptop.

I debated mounting the york sideways to give additional room, but it ended up not being necessary.

 

[Pin_Head]

Try tightening the belt. I think its normal operating pressure is something like 300 PSI.

 

[Seth_O]

Try tightening the belt. I think its normal operating pressure is something like 300 PSI.

Tks Pin-head. I assumed I would be ok with ~1" of deflection on the belt on a 10" stretch; I didn't even think it might not be tight enough to drive the compressor.

 

[superg]

Do you have the dimensions of the bracket, the dimension i need is from hole to hole so it lines up with the other pulleys, thanks.