SENR3988-01November 1990

Motor GraderHydraulic Systems12G61M12027-UP3WC1067-UP

120G87V8360-UP11W1251-UP

130G74V2321-UP12W1082-UP

140G72V10334-UP�13W741-UP

14G96U7046-UP

16G93U2679-UP

©1990 CaterpillarAll Rights Reserved

Printed in U.S.A.

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No. Description No. Description1 Riper/Scarifier Cylinder 25 Steering Accumulator2 Side Shift Cylinder 26 Main Relief Valve3 Blade Tip Cylinder 27 Filters4 Circle Drive Motor 28 Hydraulic Tank5 LH Steering Cylinder 29 Pump Group6 RH Steering Cylinder 30 Combination7 Articulation Cylinders 31 Priority Valve8 Center Shift Cylinder 32 Wheel Lean Cylinder9 Restrictor Valve 33 Blade Lift Cylinders10 Swivel 34 Right Valve Bank11 Lock Check Valve 35 Articulation Control Valve12 Lock Check Valves 36 Center Shift Control Valve13 Crossover Relief Valve 37 Wheel Lean Control Valve14 Lock Check Valves 38 Snow Wing Control Valves (Attachment)15 Lock Check Valves 39 Blade Cushion (Attachment)16 Shuttle Valves 40 Blade Cushion Accumulators17 Hand Metering Unit 41 Solenoid Valves18 Plow/Dozer Control Valve (Attachment) 42 Supplemental Steering (Attachment)19 Left Valve Bank 43 Check Valve20 Ripper/Scarifier Control Valve 44 Relief Valve21 Blade Lift Control Valve 45 Supplemental Steering Pump22 Side Shift Control Valve 46 Blade Float (Attachment)23 Circle Drive Control Valve 47 Blade Float Valve24 Blade Tip Control Valve 48 Solenoid Valve

MOTOR GRADERS HYDRAULIC SYSTEM SCHEMATIC