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a) Loosen cover screws [Ref. 4] - Cover nut torque was at 65Nm (34Nm initially)
b) Remove Cover [5]
- Evidence of sand from testing [11] [19]
- No indication of damage or scratch on the ball [3][5]
- Some erosion in-seat contact area [6][7]
c) Remove seat [9]
- Sand behind protectors – causing no issues [11]
- O-Ring no signs of wear and tear
- Cup spring in good shape – some corrosion on the body (backside) [13]
- Thrust ring- no signs of wear and tear [13]
d) Remove Gland [14] - Gland nut torque was 6Nm (initially 13Nm)
- Vacuum during disassembly - tight seals
- Some O-Ring extrusion on the outer ring[14]
e) Remove Bonnet [15]
- Relatively easy to disassemble
- Bearing in a good condition [16]
f) Remove trunnion [17]
- Insignificant surface corrosion [17]
- Ball - minor indication of damage or scratch [19]
- Bearing in the ball in poor condition, but still sliding [20]