Case 580SR Service Manual page 627

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Disassembly of control valve sections (with me-
chanical control)
There are indicated all possible solutions relevant to
backhoe control sections with mechanical control.
1. Secondary relief valve
2. Pressure compensator
3. Check valves
4. Plug
5. Spool with spring return system
SECTION 35 - HYDRAULIC SYSTEM
6. Spool with mechanical detent system (loader
boom element)
7. Spool with electrical detent system (loader
bucket element)
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