34 - 7
Spool Assemblies (cont’d)
Dismantling
Dipper Spool with Check Valve
1 See Spool Assemblies, Dismantling items 1 - 7.
2 Remove sealing plug 8.
3 Remove ‘O’-ring and backing ring 9 and discard.
4 Withdraw spring 10 and check valve 11.
Cleaning, Inspection
1 Clean all parts with clean oil and dry with compressed
air. Inspect all parts.
2 Ensure check valve 11 moves smoothly.
3 Check spring 10 has no defects, deformation or wear.
4 Remove slight defects by lapping.
5 Renew damaged or badly worn parts.
Assembly
Assembly is the reverse of the dismantling procedure.
Torque Setting
8 30 Nm (22 lbf ft)
Section E Hydraulics
9803/6410
Section E
34 - 7
Issue 1
Control Valve
JS01040
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