34 - 8
Centre Bypass Valve (4 Spool Section)
Dismantling
1 Remove end cap 1.
2 Remove ‘O’-ring 2 and discard.
3 Remove piston 3.
4 Unscrew and remove sleeve 4.
5 Withdraw spool 5.
6 Encase spool in holder and clamp into a vice.
Note: See page 34 - 4 for details of holder.
7 Slacken and remove locknuts 6, spring seating washers
7 and spring 8.
Cleaning, Inspection
1 Clean all parts with clean oil and dry with compressed
air. Inspect all parts.
2 Ensure spool 5 and piston 3 move smoothly.
3 Check spring 8 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 Settings
1 60 Nm (44 lbf ft)
4 60 Nm (44 lbf ft)
6 25 Nm (18 lbf ft)
Section E Hydraulics
9803/6410
Section E
34 - 8
Issue 1
Control Valve
JS01050
JS01060
JS01070
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