York Compressor Modification



Yorks are great compressors, but they were designed as air conditioning compressors and they normally pump a lot of oil out of their discharge port
no matter what orientation they are mounted in. They are designed to pump oil to the seal via a loop using pressure in the crankcase to deliver oil to
the seal and then to the suction inlet port, but  you don't want this oiling system when you are using the York as an air compressor. The oil entering
the suction port that is responsible for a lot of the oil that blows out of the compressor.

Here is how you can easily modify your pumps oiling passage to the front seal, with no reliability problems. It only takes a few minutes.

REMOVAL

1 - First, remove the clutch center bolt (1/2" socket).
          * you may need a spanner wrench
          * you may want to put 12V to the compressor to engage the clutch
          * a strap wrench also comes in handy to hold the pulley

2 - Next, thread in a 5/8" x 2 1/2" NC bolt into the clutch. Tighten the bolt until the clutch pulley is free.

3 - Next, remove the 4 clutch mounting bolts (3/8" socket) and remove the clutch.

4 - Now remove the 6 seal plate screws (1/4" socket) and remove the plate.
          * the seal plate has an o-ring on the backside

5 - Next, slide the seal retainer assembly off the shaft.

6 - Next, put some paper towels or rags in to protect the bearing.

7 - Next, drill the oil passage hole with a 5/32" drill bit.

8 - Next, tap the hole to 10-32.

9 - Next, insert a 10-32 set screw
          * put a drop of loc-tite on the screw
          * be sure you tap deep enough so the set screw is flush or recessed

10 - Now you just have to put if all back together.


TORQUE VALUES

seal plate screws       -  5 to 8 ft. lbs.
clutch mounting bolts - 13 to 19 ft. lbs.
clutch center bolt       - 20 to 25 ft. lbs.


See the York Compressor Service Manual for any further instructions.







  Remove the clutch center bolt (1/2" socket).




Thread in a 5/8" x 2 1/2" NC bolt into the clutch. Tighten the bolt until the clutch pulley is free.



Remove the 4 clutch mounting bolts (3/8" socket) and remove the clutch.




Remove the 6 seal plate screws (1/4" socket) and remove the plate.





Slide the seal retainer assembly off the shaft.




Put some paper towels or rags in to protect the bearing.




Drill the oil passage hole with a 5/32" drill bit.




Tap the hole to 10-32.




Insert a 10-32 set screw.





Re-install the seal retainer assembly.




Re-install the seal plate.




Re-install the clutch.




Re-install the pulley.




All done.



If you have any comments, suggestions, or see any errors, please let me know..... cbradley@telus.net

This site was last updated in some way on April 16/2006.

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