TM 5-3805-291-23-1
THEORY OF OPERATION - CONTINUED
0003 00
ELECTRO-HYDRAULIC SYSTEM - CONTINUED
9.
Main Control Valve.
427-C1826
3-Function Main Control Valve with Ride Control Schematic.
(87) Tilt control valve
(99) Hydraulic lockout solenoid valve
(111) Check valve
(88) Lift control valve
(100) Dead engine lower pilot oil
(112) Ride control ON/OFF solenoid
accumulator
valve
(89) Ride control valve
(101) Dead engine lower manual valve
(113) Auxiliary valve stem
(90) Auxiliary control valve
(102) Compensation and load check
(114) Pump margin pressure relief valve
valve
(91) Inlet valve manifold
(103) Ride control relief valve
(A) Hydraulic tank
(92) End cover valve manifold
(104) Pressure reducing valve
(B) Pump port
(93) Drift reduction solenoid valve
(105) Signal duplication pressure
(C) Tank port
reducing valve
(94) Line relief valve
(106) Main, load sensing relief valve
(D) Tank port
(95) Pilot proportioning solenoid valve
(107) Tilt valve stem
(E) Signal oil to pump
(96) Ride control, lift cylinder solenoid
(108) Shuttle valve load signal resolver
(F) Load sensing relief drain
valve
(97) Ride control accumulator
(109) Lift valve stem
(98) Line relief valve
(110) Shuttle valve
0003 00-159
