RADIATOR GP 1246506 - Caterpillar

Illustration 1 g02972636
Typical seven bank mechanical hoe valve schematic (416F valve schematic shown)
(1) Left stabilizer
(2) Boom
(3) Swing
(4) Bucket
(5) Stick
(6) E-stick
(7) Right stabilizer
(8) Pump supply
(9) Load sense
(10) Tank (Drain) line
(11) Pressure compensators
(12) Line relief and makeup valves The basic backhoe valve consists of six control valves. All the valves except the stabilizer valves are Proportional Priority Pressure Compensation (PPPC). The machines can be configured with a seventh valve for the E-stick.The pressure compensator in each control circuit creates a load sense (LS) signal pressure. Supply oil in the individual control valve is diverted into a signal line within the control valve. The highest LS signal is sensed at all of the pressure compensators in the backhoe group. This LS pressure is also sensed at the pump control valve.Note: The stabilizer control valves are typically operated independently of all other control circuits. For this reason, there is no need for the stabilizer control valves to be PPPC. The pump control valve will provide pressure compensation for the stabilizer control valves when operating the stabilizers.
Illustration 2 g02976974
(1) Left stabilizer
(2) Boom
(3) Swing
(4) Bucket
(5) Stick
(6) E-stick
(7) Right stabilizer
(8) Pump supply
(9) Load sense
(10) Tank (Drain) line
(13) Inlet manifold
(14) Outlet manifold
(A) "A" workports
(B) "B" workports
Illustration 3 g02976976
(1) Left stabilizer
(2) Boom
(3) Swing
(4) Bucket
(5) Stick
(6) E-stick
(7) Right stabilizer
(8) Pump supply
(9) Load sense
(10) Tank (Drain) line
(13) Inlet manifold
(14) Outlet manifold
(15) Auxiliary
(A) "A" workports
(B) "B" workports The machine can be equipped with seven bank, or eight bank valves. The bank valves (backhoe) are located below the floorplate at the rear of the operator station. The valves are mounted on the rear frame. The work ports for the valves face the rear of the machine.Standard equipment for the seven bank valve are:
Inlet manifold
Stabilizer control valves
E-Stick control valve
Stick control valve
Bucket control valve
Swing control valve
Boom control valve
Outlet manifoldThe inlet ports for the bank valves (backhoe) are in inlet manifold (13). The outlet ports (13) for the bank valves (backhoe) are in outlet manifold (14).The seven valve bank only includes the extendable stick valve (6) and no auxiliary valve (15). The eight valve bank includes both the extendable stick valve (6) and auxiliary valve (15). The auxiliary control valve (6) is optional.Linkage rods connect all valve sections to the operator control levers. All sections of the control valve are the type that has a closed centered position.