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| Illustration 1 | g00567074 |
(1) Location for the load control valve (if equipped) for the stick (2) Location for the load control valve for the boom | |
The load control valve for the stick is used in order to hold the stick in place in case of a hose failure in the stick circuit.
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| Illustration 2 | g00567121 |
Schematic for the load control valve for the stick (1) Line to the head end of the cylinder, (2) Line to the rod end of the cylinder, (3) Purging screw, (4) Line to the control valve., (5) Line to the control valve and (6) Line to the load control valve for the boom | |
The operator moves the control for the stick in order to move the stick to the STICK OUT position. The oil flows from the control valves to the lines for the rod end of cylinder (4). The oil flows past the check valves and the oil flows into the rod end of cylinder (2). This causes the rod to retract. As the rod retracts this causes the stick to move outward.
The operator moves the control for the stick in order to move the stick to the STICK IN position. The oil from the control valves flows into lines (5). The oil flows into the line for the head end of cylinder (1). This causes the rod of the cylinder to extend. As the rod extends this causes the stick to move inward.
Use purging screw (3) in order to move the stick in, if a hose failure occurs. Refer to Operation and Maintenance Manual, SEBU6873-04, "Equipment Lowering with Engine Stopped".
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| Illustration 3 | g00567121 |
Schematic for the load control valve for the boom (1) Line to the head end of the cylinder, (2) Line to the rod end of the cylinder, (3) Purging screw, (4) Line to the control valve., (5) Line to the control valve and (6) Line to the load control valve for the stick | |
The load control valve for the boom is used in order to hold the boom in place in case of a hose failure in the boom circuit.
Move the control for the boom to the RAISE position. The oil flows from the control valves to lines (4). The oil flows past the check valves and the oil flows into the rod end of cylinder (2). This causes the rod to retract. As the rod retracts this causes the boom to raise.
The operator moves the control for the boom in order to move the boom to the LOWER BOOM position. The oil from the control valves flows into lines (5). The oil flows into the line for the head end of cylinder (1). This causes the rod of the cylinder to extend. As the rod extends this causes the boom to lower.
Use purging screw (3) in order to lower the boom, if a hose failure occurs. Refer to Operation and Maintenance Manual, SEBU6873-04, "Equipment Lowering with Engine Stopped".