SENSOR AS- 5384871 - Caterpillar

Illustration 1 g02476008
(1) Solenoid
(2) Oil to the tank
(3) Pilot supply
(4) Rod end
(5) Return passage
(6) Head end
(7) Return passage
(8) Signal chamber
(9) Pilot chamber
(10) Centering spring
(11) Oil from the ripper lift control valve
(12) Resolver
(13) Oil to the resolver on the implement pump
(14) Oil from the implement pump
(15) Load check valve
(16) Chamber
(17) Orifice
(18) Valve spool
(BB) Cutaway section
(CC) Surface of the part
(FF) Moving parts or activated components
(GG) Return oil
(JJ) High-pressure oil
(KK) First pressure reduction
(PP) Pilot or signal oil
(QQ) First reduction in pilot or signal oil
Illustration 2 g02475823
Schematic shows the ripper lowering with the shank tip moving outward.
(1) Solenoid
(3) Pilot supply
(4) Rod end
(6) Head end
(9) Pilot chamber
(12) Resolver
(13) Oil to the resolver on the implement pump
(15) Load check valve
(18) Valve spool
(BB) Cutaway section
(CC) Surface of the part
(FF) Moving parts or activated components
(GG) Return oil
(JJ) High-pressure oil
(KK) First pressure reduction
(PP) Pilot or signal oil
(QQ) First reduction in pilot or signal oil When the operator moves the ripper control lever from HOLD to SHANK IN, left solenoid (1) is energized. The solenoid valve opens in order to allow pilot supply oil (3) into pilot chamber (9) on the left end of valve spool (18). The pressure of the pilot oil shifts the valve spool to the right.When valve spool (18) shifts, right orifice (17) is exposed to the pressure in passage (6). The oil that enters orifice (17) becomes signal oil. The signal oil flows through an internal passage in the middle of valve spool (18) to signal chamber (8). From signal chamber (8), the oil flows to resolver (12).The signal oil is at the same pressure as the oil in the head end of the ripper tip cylinders. If this pressure is higher than the pressure from the ripper lift control valve, the ball in resolver (12) shifts to the right. The signal is sent through the inlet manifold to the resolver that is mounted to the implement pump. If this signal is the highest pressure of all the implements, the signal is sent to the compensator valve of the implement pump. The pump upstrokes in order to meet the demand.When the increased flow of pump supply oil builds enough pressure to overcome the existing pressure plus the spring force behind load check valve (15), the load check valve shifts to the left. Pump supply oil flows through chamber (16), around valve spool (18), and into passage (6). After the pump oil leaves through passage (6), the oil flows to the head end of the ripper tip cylinders. The shank of the ripper tips inward.Oil from the rod end of the ripper tip cylinders returns through passage (4). The oil returns to the hydraulic tank through the inlet manifold.All of the pressures and forces within the control valve equalize in order to provide smooth operation for the ripper tip cylinders.Shank Out
The operation of the ripper tip control valve in SHANK OUT is similar to the operation of the ripper tip control valve in SHANK IN.When the operator moves the ripper control lever from HOLD to SHANK