Gravely 950001, Maintenance Manual

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8. O-ring Retainer - Remove the O-ring retaining
washer from each end of the work section.
9. Spool O-rings - Remove both O-rings from each
end of the working section and discard them.
10.Load Check - Remove the load check valve from
the working section.
11.Main Relief Valve - These parts should not be
removed from the inlet end cover unless they need
to be replaced. See Relief Valve Adjustment on
page 51.
Cleaning, Inspection And Repair
1. Inspect the spool bores, check seats and spools for
deep scratches, gouges or excessive wear. If any
of these conditions exist, replace the section.
Minor surface damage on the control spool may be
carefully polished away with very fine cloth.
2. Examine the machined surfaces of the valve
housing for nicks and burrs that could cause
leakage between sections. Lightly stone these
surfaces to remove any rough spots.
3. Wash all parts thoroughly in a clean solvent and
blow dry before beginning reassembly. Pay special
attention to the number and letters marked on
parts in Step 1. If any marks are removed during
cleaning, remark immediately.
Reassembly
Reassembly of the directional control bank is simply
the reverse of the disassembly procedure replacing all
seals with a new seal kit. However, the following points
should be check and confirmed during reassembly.
RELIEF VALVE CARTRIDGE