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| Illustration 1 | g00550914 |
(1) Diverter valve. (2) Solenoid valve. | |
The diverter valve (1) maintains the selected angle of the work tool as the lift arms are raised.
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| Illustration 2 | g00551233 |
(2) Solenoid valve. (A) Oil for the rod end of the lift cylinders (B) Oil for the control valve (lift) (C) Oil for the rod end of the tilt cylinders (D) Oil for the head end of the tilt cylinders | |
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| Illustration 3 | g00551455 |
(3) Automatic leveling switch. | |
The solenoid valve (2) enables the diverter valve. The solenoid valve is controlled by a switch (3) on the left hand console in the cab. Press the bottom of the switch in order to activate the diverter valve. Press the top of the switch in order to deactivate the diverter valve.
Self-Leveling Operation (Raising the Work Tool)
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| Illustration 4 | g00551505 |
(4) Flow divider valve. (5) Unloading spool. (A) Oil for the rod end of the lift cylinders (B) Oil for the control valve (lift) (C) Oil for the rod end of the tilt cylinders (D) Oil for the head end of the tilt cylinders | |
When the control valve (tilt) is in the HOLD position and the control valve (lift) is in the RAISE position, oil enters the diverter valve through port (A). As the lift cylinder extends, oil flows from the rod end of the cylinder into port (A). Oil then flows through the adjustable orifice and through the fixed orifice in the flow divider (4). The size of the load determines the size of the adjustable orifice. The oil that flows through the fixed orifice flows out of port (B) and back to the tank. The oil that flows through the adjustable orifice then flows out of port (D). From port (D), oil flows to the head end of the tilt cylinders and to the control valve (tilt). The resistance to movement of the tilt cylinders creates a pressure that is great enough to open the unloading spool (5) in the diverter valve. As the tilt cylinders extend, the oil from the rod end of the tilt cylinders flows into port (C) through the open unloading spool and out port (B) back to the tank. The unloading spool prevents the tilt cylinders from dumping during the self-level cycle.
Lowering the Work Tool
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| Illustration 5 | g00551970 |
(5) Unloading spool. (6) Check valve. (7) Check valve. (A) Oil for the rod end of the lift cylinders (B) Oil for the control valve (lift) (C) Oil for the rod end of the tilt cylinders (D) Oil for the head end of the tilt cylinders | |
When the control valve (tilt) is in the HOLD position and the control valve (lift) is in the LOWER position oil enters the diverter valve through port (B) from the control valve. The oil opens the check valve (6) and flows out of port (A) to the rod end of the lift cylinders. Flow from the head end of the cylinders is directed to the control valve (lift) and back to the tank.
Tilting the Work Tool Forward
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| Illustration 6 | g00551970 |
(5) Unloading spool. (6) Check valve. (7) Check valve. (A) Oil for the rod end of the lift cylinders (B) Oil for the control valve (lift) (C) Oil for the rod end of the tilt cylinders (D) Oil for the head end of the tilt cylinders | |
When the control valve (lift) is in the HOLD position and the control valve (tilt) is in the TILT FORWARD position oil flows into the head end of the tilt cylinders. The oil also flows into the diverter valve through port (D), but the flow is blocked by the check valve (7). Oil from the rod end of the tilt cylinders enters the diverter valve through port (C), but the flow is blocked by the unloading spool (5). Flow from the rod end of the tilt cylinders is directed to the control valve (tilt) and back to the tank.
Tilting the Work Tool Backward
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| Illustration 7 | g00551970 |
(5) Unloading spool. (6) Check valve. (7) Check valve. (A) Oil for the rod end of the lift cylinders (B) Oil for the control valve (lift) (C) Oil for the rod end of the tilt cylinders (D) Oil for the head end of the tilt cylinders | |
When the control valve (lift) is in the HOLD position and the control valve (tilt) is in the TILT BACK position oil flows into the rod end of the tilt cylinder from the tilt control valve. Oil also flows into the diverter valve through port (C), but the flow is blocked by the unloading spool (5). Oil flows from the head end of the tilt cylinder to the control valve (tilt) and back to the tank. Oil from the head end of the tilt cylinder also flows to the diverter valve through port (D), but the flow is blocked by the check valve (7) .