TIE ROD END 0971872 - Caterpillar

Illustration 26 g03402763
Winch Control Valve (WINCH HOLD)
(6J) Reel out solenoid
(6K) Reel in solenoid
(8) Port "A"
(9) Port "B"
(10) Return oil to hydraulic tank
(11) Pilot oil passage
(12) Signal line
(13) Implement pump supply
(20) Spring
(21) Valve spool
(23) Chamber
(29) Load check valve
(30) Pilot chamber
(31) Resolver
(32) Spring chamber
(33) Flow control valve spool
(36) Left orifice
(37) Right orifice
(38) Signal chamber
(39) Makeup valve
(BB) Cutaway section
(CC) Surface of part
(FF) Activated component
(GG) Tank pressure
(KK) High pressure
(SS) First pilot pressure reduction When winch control lever (58) in the HOLD position, sends a pulse width modulated signal with a nominal duty cycle of 50 percent to ECM (24).ECM (24) interprets the signal as an operator request to hold the winch position. ECM (24) sends a signal to solenoid (6K) and solenoid (6J). The solenoids are de-energized, causing pilot chambers (30) to open to the hydraulic tank. Valve spool (21) is held in the center position by centering springs (20). In the center position, valve spool (21) blocks pump supply oil. Also, the winch valve spool blocks the oil from flowing to port "A" (8) and port "B" (9) of the winch arrangement. The oil in the passages are trapped and the winch does not move.REEL OUT Position
Illustration 27 g03404993
(6J) Reel out solenoid
(6K) Reel in solenoid
(10) Return oil to hydraulic tank
(11) Pilot oil passage
(12) Signal line
(13) Implement pump supply
(21) Valve spool
(24) ECM
(57) Winch control valve
(58) Winch control lever
(59) Winch arrangement
(60) Winch manifold and control group
(61) Winch lockout switch
(66) Counter balance valve
(BB) Cutaway section
(CC) Surface of part
(FF) Activated component
(GG) Tank pressure
(KK) High pressure
(LL) First pressure reduction
(RR) Charge or pilot pressure
(SS) First pilot pressure reduction
Illustration 28 g03402916
Winch Control Valve (WINCH REEL OUT)
(6J) Reel out solenoid
(6K) Reel in solenoid
(8) Port "A"
(9) Port "B"
(10) Return oil to hydraulic tank
(11) Pilot oil passage
(12) Signal line
(13) Implement pump supply
(20) Spring
(21) Valve spool
(23) Chamber
(29) Load check valve
(30) Pilot chamber
(31) Resolver
(32) Spring chamber
(33) Flow control valve spool
(36) Left orifice
(37) Right orifice
(38) Signal chamber
(39) Makeup valve
(BB) Cutaway section
(CC) Surface of part
(FF) Activated component
(GG) Tank pressure
(KK) High pressure
(LL) First pressure reduction
(SS) First pilot pressure reduction Winch control lever (58) in the REEL OUT position sends a pulse width modulated signal with a lower than the nominal duty cycle of 50 percent to ECM (24).ECM (24) interprets the signal as an operator request to reel out the winch. ECM (24) sends a signal to solenoid (6J). The solenoid is energized, causing the solenoid valve to open in order to allow pilot supply oil in pilot oil passage (11) into pilot chamber (30) on the right end of valve spool (21). The pressure of the pilot oil shifts valve spool (21) to the left.When valve spool (21) shifts, left orifice (36) is exposed to the pressure in the passage to port "A" (8). The oil that enters orifice (36) becomes signal oil. The signal oil flows through an internal passage in the middle of the valve spool (21) to signal chamber (38). From signal chamber (38), the oil flows to spring chamber (32).The signal oil is at the same pressure as the oil in winch arrangement (59).