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| Illustration 1 | g03747687 |
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(1) Pump discharge
(2) Pump load sense (3) HMU (4) Lift cylinders (5) Tilt cylinders (6) Auxiliary cylinders (7) Auxiliary spool (8) Line relief valves (9) Tilt spool (10) Lift spool (11) Pressure compensator (12) Load sense relief valve (13) Priority valve (14) Load sense signal drain valve (15) Tank (16) To pump supply (17) HMU load sense signal | |
Shown above is the loader valve schematic for the 415F2 single tilt without EH auxiliary machines and without ride control.
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| Illustration 2 | g03796074 |
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Loader bank valve for the mechanical operated machines (1) Outlet manifold (2) Auxiliary control valve (If equipped) (3) Loader tilt control valve (4) Loader lift control valve (5) Inlet manifold (6) Load signal relief valve (11) Priority valve (12) Load signal drain | |
The control valves are closed-center, with pressure compensation occurring after the directional control spool.
The loader valve group includes the inlet manifold, the lift, tilt, and auxiliary control valves. The tilt control valve contains two line relief and makeup valves. The auxiliary valve (where fitted) contains a single-line relief and makeup valve.
Oil flows from the hydraulic pump to the inlet manifold and to the steering Priority Valve. The spring holds the priority spool in a position that ensures the steering circuit receives oil flow first. If oil flow is not needed for steering and a control function is activated, the priority valve shifts, directing most of the oil to the loader control valves.