GENERATOR GP 5265101 - Caterpillar

Track Brake Valve (located next to hydraulic tank)
(2) Valve (3) Inlet (oil flow from pilot system valve) (7) Plunger (12) Inlet passage (pilot system supply oil) (13) Outlet passage (oil to release brakes) (14) Outlet to tank Schematic For Swing Control
For description of components also see Pump Flow And Pressure Control.
(1) Relief Valve For The Pilot System. This valve limits the pressure in the pilot system to 335 psi (2300 kPa)(2) Selector Valve (shown in OPERATE position). When the selector valve is in the OPERATE position, there is pilot oil pressure to operate any control valve in the pilot system(3) Oil line for supply of pilot pressure oil to pilot control valves(4) Pilot Valve. Manually operated for control of pilot pressure oil to the main control valves for the stick and swing(5) Gear-type pump(6) Filter For Pilot System(7) Blocker Valve. This valve is controlled by pilot pressure oil from the shuttle valve. It controls the flow of main system oil from the main control valve for right track (front pump) to the main control valve for the left track(8) Oil line for main system oil from blocker valve to main control valve for left track control(9) Shuttle valve. This valve allows the swing pilot pressure signal to open valve (3)(10) Oil line for pilot pressure oil to main control valve for swing RIGHT(11) Oil line for pilot pressure oil to main control valve for swing LEFT(12) Oil line for main system oil from main control valve for right track to the blocker valve(13) Oil line for main system oil from the combiner valve (rear pump) to the main control valves for swing, left track, stick and boom crossover(14) Main Control Valve For Swing. This valve is controlled by the pilot valve for swing movement. It controls the flow of oil from the rear pump to the swing motor(15) Check Valve. This valve makes it possible to use the stick and swing or stick and left track circuits at the same time(16) Main Control Valve For Left Track. This valve is controlled by the pilot valve for left track movement. It controls the flow of oil from the rear pump to the left track motor(17) Oil line for main system oil from control valve for swing to swing motor, swing LEFT(18) Oil line for main system oil from control valve for swing motor, swing RIGHT(19) Line Relief Valves For Swing. These valves limit the pressure in the swing circuits to 17 600 200 kPa (2550 29 psi)(20) Bent-Axis Piston Pump (Rear). This is a variable displacement pump. It supplies the main oil flow to operate the swing motor, the left track motor, the stick cylinder and, when the boom crossover valve is activated, the boom(21) Relief Valve For Main System Pressure. Even though this valve is in the swing circuit, the pressure of the circuit is controlled by the line relief valves(22) Combiner Valve For Main System Oil. This valve has internal passages that go to the