KIT-REPAIR 2491208 - Caterpillar

Pin Puller Hydraulic System (Single Shank Rippers)
Pin Puller Hydraulic System
(1) Pin puller hydraulic cylinder. (2) Pin puller control valve. (3) Toggle switch. (4) Line (to head end of cylinder). (5) Line (to rod end of cylinder). (6) Transmission oil pump. (7) Priority valve. (8) Transmission of oil filter.Pin puller control valve (2) is a three position valve. The positions are: ENGAGE, HOLD and DISENGAGE.Pressure oil for the pin puller circuit comes from transmission pump (6). Return oil from the system flows back to the transmission.Pin puller cylinder (1) is installed on the ripper. Linkage connects the cylinder rod to the pin. The pin can be engaged or disengaged to change the position of the ripper shank.
Location of Pin Puller Control Valve
(2) Pin Puller Control Valve.Pin puller control valve (2) is a closed centered solenoid valve that is operated by toggle switch (3) in the cab. Toggle switch (3) is a locking switch that must be pulled up before it can be moved to an operating position.When toggle switch (3) is moved to an operating position, pressure oil flows through the control valve to line (4) or (5). Oil through line (4) to the head end of the pin puller cylinder engages the pin. Oil through line (5) disengages the pin.Dual Tilt Control Valve
Schematic of Dual Tilt Control Valve (DUAL TILT Position)
(1) Line from the bulldozer control valve. (2) Dual tilt control valve. (3) Chamber for pilot oil. (4) Dual tilt cylinder. (5) Line from the bulldozer control valve. (6) Passage to hydraulic tank for solenoid valve. (7) Passage for pilot oil. (8) Port to head end of right dual tilt cylinder. (9) Chamber for pump oil from the bulldozer control valve. (10) Port to rod end of right dual tilt cylinder. (11) Chamber for pump oil from the bulldozer control valve. (12) Passage for pilot oil. (13) Passage for pilot oil to the solenoid valve. (14) Solenoid valve. (15) Stem in dual tilt control valve. (16) Chamber for pilot oil. (17) Port to rod end of left dual tilt cylinder. (18) Dual tilt cylinder. (19) Switch handle. (S1) Coil for tip operation of the cylinders. (S2) Coil for single tilt operation of the cylinders.Dual tilt control valve (2) is an attachment that gives the tilt cylinder hydraulic circuit three different types of operation: DUAL TILT, SINGLE TILT and TIP.Dual tilt control valve (2) is installed in the radiator guard in front of the engine cooler. The control valve is activated by pilot oil pressure from the inlet side of the engine fan motor.Solenoid valve (14) directs the pilot oil to the ends of stem (15). Switch handle (19) controls the operation of the solenoid valve with a toggle switch for SINGLE TILT operation and a push button switch for TIP operation.Dual Tilt Operation
When solenoid valve (14) is not energized by switch handle (19), dual tilt control valve (2) is in the DUAL TILT position. Tilt cylinders (4) and (18) move in opposite directions.When the bulldozer control lever is