DSG-01 BODY spool sticky1SSSSSSSSSS.pptx

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1. Comprehensive Hydraulic Solutions DSG-01 SPOOL STICKY ANALYSIS

2. Comprehensive Hydraulic Solutions What is the mean by spool sticky ? If the clearances between the spool and bore become occupied by hard particles or soft particles, more force is required to move the spool. A sticky spool in a directional control valve (DCV) can lead to issues like inconsistent operation, slow response, or complete failure to shift positions properly .

3. Comprehensive Hydraulic Solutions Here’s a brief overview highlighting the possible causes for spool sticky, focusing on key factors such as the bore edge condition, finish, and other potential issues. I'll break it down in a simple comparison format to show both "OK" and "NOT OK" conditions. Key Points: Cleanliness : Ensure the bore is free from contaminants. Smoothness : A well-finished, smooth bore allows for the spool to move freely. Structural Integrity : The bore should be free of dents or deformation. Shape : Maintaining perfect cylindricity of the bore ensures uniform movement for the spool. Understanding these "OK" and "NOT OK" conditions helps in diagnosing the root causes of spool sticking and taking corrective action.

4. Comprehensive Hydraulic Solutions FIR LIST DATA ASSEMBLY FTA DATA EXTRACTION OF DATA FROM THE LAST TWO MONTHS NOVEMBER-DECEMBER-2024 " spool sticky problem " that has not occurred in the last two months, either at the in-house facility or at the customer's location. Am trying to explain this concept with an example from old data for understanding purposes.

5. Comprehensive Hydraulic Solutions The parameters which can causes Spool Sticky When considering the Bodies. Bore Edge Condition Bore Finish Dent, Damages & Burr Bore Cylindricity Bore Size There are various parameters that could cause spool stickiness . Here are some key factors to consider:

6. Comprehensive Hydraulic Solutions Bore Edge Condition OK NOT OK

7. Comprehensive Hydraulic Solutions Bore Finish NOT OK OK

8. Comprehensive Hydraulic Solutions Bore Dent & Damages OK NOT OK

9. Comprehensive Hydraulic Solutions Bore Cylindricity report OK NOT OK

10. Comprehensive Hydraulic Solutions The spool is a key component in directing the flow of hydraulic fluid. The parameters which can causes Spool Sticky For spools Dent, Burr and Damages Spool E dge condition Brushing and Cleaning Spool Cylindricity Spool size Spool Taper

11. Comprehensive Hydraulic Solutions Scoring marks on spool OD because of contamination Defects for spool sticky NOT OK

12. Comprehensive Hydraulic Solutions Dent and burr on spool OD NOT OK

13. Comprehensive Hydraulic Solutions Scratch marks on spool OD NOT OK

14. Comprehensive Hydraulic Solutions Spool Cylindricity report Not ok spool Ok spool

15. Comprehensive Hydraulic Solutions Conclusion : "By analyzing old data and comparing it with the present situation, the team can identify the specific changes that successfully resolved the spool sticky issue. This process ensures that issues doesn't reoccur ."This emphasizes the importance of both data analysis and preventive measures.

16. Comprehensive Hydraulic Solutions Thank You