PTA522, PTA523 and PTA524 Automatic Silent Compressors
Chapter 3: Operation
Page 10
ETN057391-D02
Once a Year
Check for any air leaks on the outlet pressure regulator (Figure 2, Item 5).
Check the safety valve (Figure 2, Item 7) by pulling the hose-connector end gently when there is pressure in the tank, and
ensuring that air escapes.
Note
: this test is easier to perform, the higher the pressure is within the tank (easiest at 8 bar).
Caution
If venting via the pressure relief valve, there is a sudden release of air when the vent is pulled. This is very noisy
and could cause alarm to other people in the vicinity. A verbal warning should be given that a vent is about to
happen, before commencing the vent.
Drain and replace the oil – see section 3.4.8.
3.4.8. Draining and Replacing the Oil
Note: motor oil is drained through the oil sight glass port, but refill is via the dedicated oil refill tube on the side of the housing
(see section 3.1). Do not refill oil through the sight glass port. Do not drain oil via the refill tube.
1. Using a 13 mm spanner, remove all four bolts that attach the motor unit to its base via the rubber vibration dampers
- Figure 13a.
2. Disconnect the flexible hose at the outlet of the motor using a 13 mm spanner – Figure 13b.
3. Arrange the compressor on a block, elevated from the intended drained oil tray and tilt the motor back as shown in
Figure 13c. Do not turn it upside down.
4. Using a 27 mm tube spanner, remove the oil sight glass (Figure 13d) and empty all the oil through the open port.
Figure 13 Draining the Oil
