jcb JS200 Service Manual page 290

Section E
33 - 2
Dismantling (continued)
18. Remove the main relief valve 13 (Hexagonal 32 A/F) from the valve housing.
19. Remove the port relief valve 31 (Hexagonal 31.5 A/F) from the valve housing.
20. Remove the negative control relief valve 24 (Hexagonal 36 A/F) from the valve housing.
21. If possible, do not disassemble the relief valve. Refer to Relief Valve dismantling and assembly.
22. The blind plugs 12 (Hexagonal 22 A/F) and 53 (Hexagonal 36 A/F) should not be disassembled unless there is a defect.
23. 52 (Hexagonal socket 5 A/F) is attached to the taper screw plug so do not disassemble unless necessary.
24. Remove plug 74 (M6) and remove the 'O'-ring 75 and backup ring 76.
25. Remove plug 56 (M6) and remove the 'O'-ring 54 and backup ring 55, then disassemble the spring 53, poppet 52,
sleeve 51, backup ring 49 and 'O'-ring 50.
26. Loosen bolt 40 (Hexagonal 36 A/F) and separate the washer 39, plate 41 and 'O'-ring 38.
27. Loosen plug 65 (Hexagonal 36 A/F) and remove the 'O'-ring 66.
28. Loosen the socket head bolt 72 (Hexagonal 8 A/F) and remove the flanges 70, 71. Disassemble the sleeve 29, 46, poppet
32, 44, 47 and spring ring 31, 43, 48. Remove the 'O'-ring.
29. Loosen plug 21 (Hexagonal 27 A/F) and disassemble the 'O'-ring 22, spring 23 and poppet 24.
30. Loosen plug 26 (Hexagonal 27 A/F) and disassemble the 'O'-ring 25, spring 27 and poppet 28.
31. Remove the plug assembly 36 (Hexagonal 27 A/F).
32. Remove the relief valve 45 (Hexagonal 31.5 A/F) from the valve housing. Do not disassemble the relief valve unless
necessary.
33. The blind plugs 13 (Hexagonal 31.5 A/F), 34 (Hexagonal socket 6 A/F), 37 (Hexagonal 31.5 A/F), 67 (Hexagonal 19 A/F),
78 (Hexagonal socket 10 A/F) should not be disassembled unless there is some defect.
34. 35 (Hexagonal socket 5 A/F) is attached to the taper screw plug and should not be disassembled unless there is some
defect.
35. If possible, the 5-spool side valve housing and 4-spool side valve housing should not be separated.
36. Loosen the socket head bolt (Hexagonal 14 A/F) and remove the 'O'-rings 18, 61, 62, 63, 64.
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Dismantling, 4-spool control valve section
1. Loosen plug 49 and take out piston 51, 56 and spring). Remove 'O'-ring 50.
2. Loosen and remove the socket head bolt 47, 48 (Hexagonal socket 8 A/F) of the cap 2, 14. At this time be careful not to
drop the 'O'-rings 10, 18 and spring 8 when removing from the cap.
3. Pull out the spool 3, 4, 5, 6 as a sub-assembly from the valve housing 1.
4. Heat the spool 3, 4, 5, 6 and loosen the spool end 15 (Hexagonal 22 A/F). Disassemble the spring seat 16 and spring 17.
5. Attach tags to the spring and each spool to insure the correct direction and position when reassembling.
9803/6400
Hydraulics
Control Valve JS200/JS240
Section E
33 - 2
Issue 2*