34 - 12
Load Holding Valve
Dismantling
1 Remove socket screws 1.
2 Remove cover assembly 2.
3 Remove ‘O’-ring 3 and discard.
4 Remove spring 4.
5 Withdraw check valve 5.
6 Remove plug 6 and discard ‘O’-ring 7.
7 Withdraw piston 8.
8 Remove spring 9.
9 Remove plug 10.
10 Remove ‘O’-ring 11 and discard.
11 Remove spring 12 and check valve 13.
12 Remove cap 14.
13 Remove ‘O’- ring 15 and discard.
14 Withdraw piston 16.
15 Remove cap 17.
16 Remove ‘O’-ring 18 and discard.
17 Remove spring 19.
18 Withdraw poppet valve 20.
19 Tilt and tap cover to remove sleeve 21.
Note: Ensure the sliding surface of the sleeve is protected.
Cleaning and Inspection
1 Clean all parts with clean oil and dry with compressed
air. Inspect all parts.
2 Ensure check valve 5, pistons 8 and 16 and poppet 20
move smoothly.
3 Check springs 4, 9, 12 and 19 have 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 98 Nm (72 lbf ft)
6 30 Nm (22 lbf ft)
10 49 Nm (36 lbf ft)
14 58 Nm (43 lbf ft)
17 49 Nm (36 lbf ft)
Section E Hydraulics
9803/6410
Section E
34 - 12
Issue 1
Control Valve
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