COUPLING-PERMANENT 1242165 - Caterpillar

Shank In
The following foldout shows a schematic of the implement hydraulic system when the shank of the ripper is being tipped inward. Illustration 24 shows a cutaway view of the ripper tip control valve in the SHANK IN position. A description of the operation of the valve follows the illustrations.The callouts for both the foldout and for Illustration 24 are listed below. (1) Inlet Manifold (2) Blade Lift Control Valve (3) Blade Tilt Control Valve (4) Ripper Lift Control Valve (5) Ripper Tip Control Valve (6) Solenoid (13) Pin Puller (14) Ripper Tip Cylinders (15) Ripper Lift Cylinders (16) Dual Tilt Cylinders (17) Dual Tilt Valve (18) Single Tilt Cylinder (19) Quick-Drop Valve (20) Blade Lift Cylinders (21) Pilot Filter (22) Pressure Reducing Valve (23) Implement Lockout Valve (24) Pilot Manifold (25) Accumulator (26) Case Drain Filter (27) Vacuum Breaker (28) Screen (29) Implement Pump (30) Fan Pump (31) Fan Motor (32) Hydraulic Oil Cooler and Bypass (33) Steering Pump (34) Steering Control Valve (35) Steering Charge Filter and Bypass (36) Cold Oil Relief Valve (37) Steering Motor (38) Passage to Tank (39) Valve Spool (40) Float Boost Signal (41) Resolver (42) Flow Control Valve (43) Passage from Implement Pump (44) Passage to Pump Compensator Valve (45) Pilot Supply (46) Passage to Rod End of Ripper Tip Cylinders (47) Passage to Head End of Ripper Tip Cylinders (48) Makeup Valve (49) Load Check Valve (51) Pilot Chamber (52) Centering Spring (53) Chamber (54) Spring (55) Orifice (56) Spring Chamber (57) Signal Chamber (58) Return Passage (59) Return Passage (66) Line Relief Valve (AA) Mechanical Connection (BB) Cutaway Section (CC) Component Surface (EE) Pneumatic Pressure (FF) Activated Component (GG) Tank Pressure (JJ) High Pressure (KK) First Pressure Reduction (PP) Signal Pressure (QQ) Pilot Pressure or Reduced Charge Pressure (SS) Trapped Oil
Illustration 23 g01122293
Illustration 24 g01137508
Ripper Tip Control Valve (Shank In)When the operator moves the ripper control lever from HOLD to SHANK IN, left solenoid (6) is energized. The solenoid valve opens in order to allow pilot supply oil (45) into pilot chamber (51) on the left end of valve spool (39). The pressure of the pilot oil shifts the valve spool to the right.When valve spool (39) shifts, right orifice (55) is exposed to the pressure in passage (47). The oil that enters orifice (55) becomes signal oil. The signal oil flows through an internal passage in the middle of valve spool (39) to signal chamber (57). From signal chamber (57), the oil flows to resolver (41) and to spring chamber (56) .The signal oil is at the same pressure as the oil in the head end of ripper tip cylinders (14). If this pressure is higher than float boost signal (40), the ball in resolver (41) shifts to the right. The signal is sent through the resolver network. If this signal is the highest pressure of all the implements, the signal is sent through the inlet manifold to the compensator valve of implement pump (29). The pump upstrokes in order