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The selector valve makes the flow of the oil go to two different circuits. It will allow the ports of two double acting cylinders that have a one four way control valves or four single acting cylinders that have a two two three way control valves. You will need to decide which hydraulic circuit before you apply the pressure. Your valve spool is of he open crossover type. The spool is changed and the one outlet port begins to close and the other outlet port begins to open. Some characteristics of this valve : It has chrome plated spool High...

Series valve circuits lighten the pump flow to the tank when all the 4 ways are in the midpoint position. Pump flow goes thru each of the valves, then the pressure drops additive in. They also have the potential to give the two valves a positive motion of being two functions by applying the exhaust flow from the upstream actuator. You will need to be aware of certain cautions like the pressure and flow intensifying the differential cylinders and the effects of the back pressure on upstream applications.   The parallel series circuits block the pressure in neutral and use...

These pump are widely used on dump trucks, tractor trailers and heavy duty trucks. They have a one piece drive shaft and gears made of steel, which are help up by roller bearings. It also has pressure balanced thrust plates that give a seal for constant efficiency and hold up to the pumps reliability. There is an internal relief valve that guards the pump and cylinder circuit. The three position valve is in the upright position, the relief valve operates as a system relief to guard against overloading. When it is in the hold position, it moves as a port...

These types of pumps and motors were made to endure long lengths of run time while running pressures at 3500 psi. The mountings are a SAE B 2 and 4 bolt flange and a SAE C 2 and 4 bolt flange. The shafts and covers on them can use a single or twin shaft seal. If you have twin seals a tapped drain hole is made available. You can have either CW or CCW rotations and motors are bi directional. They suggest you use direct drives. Radial load acceptable when you have an optional outboard bearing. The housings are cast...

On the performance data it shows gear widths, but if you need different sizes here is how to do that, multiply vales in the tables below by the actual gear width. On single unit assy. codes you will need to put together shaft end cover, port end cover, gear housing and drive shaft codes. A P or M needs to in front of the code number, P for pump and M for motor. Below is a chart for the single series. To do multiply units will be the same as single except for different components you will need to add...