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| Illustration 1 | g01278095 |
(1) Work tool (2) Pressure switch (3) Valve (4) Main control valve (5) Relief valve (6) Medium pressure pump (7) Drain filter (8) Return check valve (9) Oil cooler (10) Return filter (11) Hydraulic tank (a) Case drain return line (b) Return line (c) Supply line (d) Return line | |
A medium pressure circuit is available for machines that are equipped with a butt-n-top.
Oil flows through supply line (c) to the work tool. If valve (3) is in the NEUTRAL position, oil will flow through return line (d) to return check valve (8). The oil flows through oil cooler (9) and return filter (10) to hydraulic tank (11). When valve (3) is in the RUN position, oil is blocked. Oil flows to the work tool. Return oil flows through return check valve (8) to oil cooler (9) and through return filter (10) back to hydraulic tank (11). Case drain oil flows through case drain return line (a) through drain filter (7) and back to hydraulic tank (11). During the operation of the work tool, pressure switch (2) senses oil pressure in supply line (c).