PTA522, PTA523 and PTA524 Automatic Silent Compressors Chapter 3: Operation
Rev A August 2021 Page 11
5. Check the integrity of the O-ring of the oil level glass and replace if damaged.
6. Tighten the oil level glass in its seat again and check that during the operations the O-ring is sealing properly; if
needed, put some sealing liquid on the oil level glass thread before re-inserting it in its seat.
7. Refit the flexible hose and the four base locating bolts
8. Refill with oil – see section 3.1
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