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| Illustration 1 | g00478520 |
The boom and hook control valve consists of the following components: manifold (1), main relief valve (2), two-way pilot control valve (3), three-way pilot control valve (4), pressure reducing valve (5), check valve (6), shuttle valve (7), shuttle valve (8), shuttle valve (9), hook control valve (10), boom control valve (11) and return manifold (12) .
Main Relief Valve
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| Illustration 2 | g00478940 |
Torque for installing the valve ... 210 ± 7 N·m (155 ± 5 lb ft)
Relief setting ... 33100 kPa (4800 psi)
(1) Turn the screw clockwise in order to increase the valve setting. One complete rotation is equal to a pressure change of 8070 kPa (1170 psi).
Two-Way Pilot Control Valve
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| Illustration 3 | g00478943 |
Minimum pilot pressure to open valve ... 1380 kPa (200 psi)
Torque for installing the valve ... 491.5 ± 17.0 N·m (362.5 ± 12.5 lb ft)
Three-Way Pilot Control Valve
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| Illustration 4 | g00479045 |
Pressure setting to shift valve ... 275 kPa (40 psi)
Torque for installing the valve ... 44.0 ± 3.5 N·m (32.5 ± 2.5 lb ft)
(1) Turn the screw clockwise in order to increase the valve setting. One complete rotation is equal to a pressure change of 524 kPa (76 psi).
Pressure Reducing Valve
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| Illustration 5 | g00479047 |
Pressure reducing valve setting ... 5170 kPa (750 psi)
Torque for installing the valve ... 44.0 ± 3.5 N·m (32.5 ± 2.5 lb ft)
(1) Turn the screw clockwise in order to increase the valve setting. One complete rotation is equal to a pressure change of 6000 kPa (870 psi).
Check Valve
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| Illustration 6 | g00479048 |
Minimum pressure that is required to open the valve ... 28 ± 7 kPa (4 ± 1 psi)
Torque for installing the valve ... 44.0 ± 3.5 N·m (32.5 ± 2.5 lb ft)
Shuttle Valve
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| Illustration 7 | g00479163 |
Torque for installing the valve ... 44.0 ± 3.5 N·m (32.5 ± 2.5 lb ft)