Roland ep-5 Manual de servicio descargar pdf (Pagina 15)

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13. Maintenance

Pilot valve

To remove the pilot valve for cleaning or inspection, remove the screw

1 and carefully lift out the complete assembly 2. Gently remove the

spool 3 from the block and clean the parts, using methylate cleaner or

similar. Blow the parts dry with compressed air. Install the spool into

the pilot valve housing, place it on a flat surface, then lift it carefully in

one end. Before reaching 20 deg angle the spool should move by itself.

Should the parts show signs of wear, a new assembly is recommended.

Mixing spool valves and valve bodies may result in very high bleed

rates and poor performance. Check the O-rings, then secure and install

the pilot valve assembly into positioner unit, press it towards the

positioner housing wall and secure it with screw 1. Make sure that the

leaf spring 4 on the balance arm 5 is properly fitted in the groove on

the spool 6. Check again to insure smooth operation of the assembly.

To maintain original factory performance specifications, use only spool

valve assemblies supplied by PMV

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Roland ep-5 Manual de servicio Pagina 15