EXTENSION AS 3048341 - Caterpillar

Illustration 1 g01506774
Hydraulic schematic for the steering system (1) Steering and implement pump (2) Steering priority valve (3) Secondary steering pump and electric motor (4) Secondary steering pressure switch (5) Secondary steering check valve (6) Primary steering pressure switch (7) Steering metering pump (8) Steering crossover relief valve (9) Left side steering cylinder (10) Right side steering cylinder (11) Control manifold for the margin relief (12) Hydraulic oil tank (13) Filter for the pump case drain
Illustration 2 g01506853
Component Location (2) Steering priority valve (3) Secondary steering pump and electric motor (4) Secondary steering pressure switch (5) Secondary steering valve (6) Primary steering pressure switch (9) Left side steering cylinder (11) Hydraulic oil tank
Illustration 3 g01506857
Component Location (1) Steering and implement pump (7) Steering metering pump (8) Steering crossover relief valve (10) Right side steering cylinder (11) Control manifold (12) Hydraulic oil filterThe steering hydraulic system is made up of one basic circuit:
High pressure circuitWhen a machine is equipped with the secondary steering attachment, the secondary steering system is an additional circuit.High Pressure Circuit
The following components are the components of the high pressure circuit: Steering and implement pump (1), left side steering cylinder (9), steering metering pump (7), right side steering cylinder (10) and hydraulic oil tank (12) with hydraulic oil filters (13) .Control manifold for the margin relief (11) is located in the middle of the right side of the machine. Steering and implement pump (1) is located under the operator's compartment. Priority valve (2) is located on the lower left side of the machine.Steering metering pump (7) is mounted on the bottom of the steering column. The steering metering pump is located under the floor of the operator's compartment.Hydraulic oil tank (12) is located behind the operator's cab. Hydraulic oil filters (13) are located in the service center on the right side of the machine.Steering metering pump (7) is a small hydraulic hand pump that is used as a metering valve and as a directional valve.Steering and implement pump (1) is a piston pump with variable flow. The steering/pilot pump provides pressure oil for the pilot circuit and for the high pressure circuit.The oil for the steering system flows from steering and implement pump (1) to control manifold for the margin relief (11). The oil then flows to priority valve (2). The oil then flows to steering metering pump (7). Pilot oil from steering metering pump (7) flows to the steering cylinders. The pressure of this oil moves the steering cylinder pistons. This causes the machine to turn.Secondary Steering
Illustration 4 g01365594
Secondary steering pump and electric motorSecondary steering pump and electric motor (3) is mounted on the left side of the machine below the operator's compartment. Secondary steering valve (5) is mounted on the inside of the rear frame on the right side of the machine.If steering and implement pump (1) or the engine fails, primary steering pressure switch (6) closes. Primary steering pressure switch (6) closes due to low oil pressure in the steering system. Primary steering pressure switch (6)