Flushing Fluid in Hydraulic Power Units

**Document and details provided by Tronair for reference only. For up to date procedures, please contact the manufacturer.

1. Remove Incoming Electrical Power From Hydraulic Power Unit.

2. Remove Cap From Reservoir Drain Assembly, And Open Drain Valve To Remove Fluid From Reservoir.

3. Remove Plug Fitting In Lower Portion Of The Cooler To Drain Fluid From Cooler.

4. Remove And Drain Pressure Filter Bowl.

5. Drain Return Filter Assembly:

A. Remove Element From Filter Assembly And Either:

I. Suck Fluid From Filter Bowl Or,

Ii. Remove Top Panel From Unit And Unscrew Filter Bowl From Assembly And Drain.

6. Drain External Pressure And Return Hoses.

7. Clean Reservoir Interior; Do Not Use Fluorine Or Chlorine Solvents.

8. Replace Filter Elements With New.

9. Return Unit To Operating Condition.

10. Fill Unit Reservoir (Do Not Exceed Maximum Level).

11. Apply Electrical Power To Unit, Open Bypass Valve, Put Unit In HPU Reservoir Mode, Make Sure Return And Pressure Ball Valves Are Fully Closed, And Start Unit.

12. Open Flow Control Valve To 1⁄2 Maximum Flow Position, Pressure Control One Turn In From Minimum.

13. Allow Fluid To Cycle For 10 Minutes.

14. Shut Down Unit.

15. Refer To Operation Manual For Bleeding Procedure To Eliminate Trapped Air From System.

16. Send A Fluid Sample For Evaluation To The Fluid Manufacture, If Acceptable;

17. Unit Is Ready To Return To Service

Did this help answer your question?

thumbs up
thumbs down

Thanks for the feedback! 🙏🏽