Oil change seal housing (TR 20-1/22/28-1, TRE 20)

+/-	Drain/fill seal housing oil

1. Protective equipment used!
2. Mixer removed, cleaned and disinfected.

1. Place mixer on a firm work surface in a horizontal position.
   CAUTION! Material damage! Do not set the mixer down on the propeller! Use an appropriate platform for the propeller diameter.
2. Secure the mixer against falling over and slipping.
3. Position a suitable tank to collect the operating fluid.
4. Unscrew the screw plug (+/-).
5. Tip the mixer and allow the operating fluid to drain out.
6. Check the operating fluid:
7. Operating fluid clear: Operating fluid can be reused.
8. Operating fluid contaminated (black): fill with new operating fluid.
9. Operating fluid milky/cloudy: Water in oil. Minor leakage through the mechanical seal is normal. If the ratio of oil to water is less than 2:1, the mechanical seal may be damaged. Change the oil and check again four weeks later. If water is again present in the oil during the second check, contact customer service!
10. Metal chips in the operating fluid: Contact the customer service!
7. Readjust the mixer so that the opening points upwards.
8. Pour the new operating fluid in through the hole for the screw plug (+/-).
9. Comply with the specifications for the operating fluid type and quantity.
9. Clean the screw plug (+/-), replace the seal ring and screw it back in. Max. tightening torque: 8 Nm (5.9 ft·lb)!
10. Restore corrosion protection: Seal screw plug, e.g. with Sikaflex.