PMV EP5, Руководство пользователя

Страница: 15 / 32

– 15 –
Manual P5/EP5 23740/98.10
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
3
2
1
6
5
4