Reinstallation of Doosan Pressure Control Sequence Valve

 This paper mainly introduces how to reinstall the doosan pressure control sequence valve

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1. Figure 16, shows PP plug and spool

2 Figure 17, shows outer spool and outer PP plug. Plug is
installed with spool.

3. Install spool into bore. See Figure 18. Use a nylon rod to
position spool in neutral position.

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4. Install spring and LS plug into bore. See Figure 19. Use a
new O-ring on plug

5. Use a 27 mm wrench to tighten PP plug and LS plug to 6
kg•m (44 ft lb). See Figure 20.

6. Assemble valve needle, spring and set screw into pressure
relief valve housing. See Figure 21. Thread pressure relief
valve into body of priority valve and tighten it. See Figure
21.





7. Install plug into pressure relief valve bore. Tighten plug to 5
kg•m (36 ft lb). See Figure 22.

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