HOSE AS 3786132 - Caterpillar

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992G Wheel LoaderSee Auxiliary View (Z) for 854G Wheel Dozer. (1) Steering Control Valve (2) Oil Cooler (3) Ball Valve (4) Check Valve (5) Relief Valve (Steering Pilot) (6) Neutralizer Valve (7) Check Valve (8) Check Valve (9) Oil Filter (Steering Pilot) (10) Pilot Valve (STIC Steering) (11) Hydraulic Tank (12) Gear Pump (Steering Pilot) (A) Pressure Tap for Pilot Oil (B) Fluid Sampling Port
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Auxiliary View (Z) (2) Oil Cooler (4) Check Valve (5) Relief Valve (Steering Pilot) (9) Oil Filter (Steering Pilot) (11) Hydraulic Tank (12) Gear Pump (Steering Pilot) (13) High Pressure Screen (A) Pressure Tap for Pilot Oil (B) Fluid Sampling Port
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(12) Gear Pump (Steering Pilot). (B) Fluid Sampling Port.The pilot oil can be supplied by one of three sources.
Steering pilot gear pump (12)
Steering pump
Secondary steering system (if equipped) Steering pilot gear pump (12) is the main source of pilot oil. The pump is a gear pump that is located on the steering pump.Pilot oil may also be supplied from the steering pump. The main steering pump supplies pilot oil if the pilot oil pump fails. Refer to Systems Operation, "Steering High Pressure System" for more information.The secondary steering system (if equipped) can also provide pilot oil. The secondary steering system is activated if the pump drive fails or if the engine fails. Refer to Systems Operation, "Secondary Steering System" for more information.During normal operation, gear pump (12) withdraws oil from hydraulic tank (11). On the 854G Wheel Dozer, pilot oil is then sent through high pressure screen (13). Pressure tap (7) is available on the steering pilot gear pump for testing pilot oil pressure. The pilot oil then travels through filter (9). Machines that are equipped with VIMS may have an optional filter bypass switch that is attached to filter (9). The warning switch will alert the operator when the filter is clogged. When the filter is clogged oil bypasses the filter.From the oil filter, the pilot oil can travel through one of two routes. One route is through pilot oil relief valve (5). The other route for pilot oil is through the pilot valve (STIC Steering).Relief valve (5) prevents the pilot oil pressure from rising beyond the pressure level of the pilot oil system. Relief valve (5) is set to 2400 kPa (348 psi). From the relief valve, pilot oil flows through oil cooler (2) and back to hydraulic tank (11) .The pilot oil can also travel through check valve (8) to pilot valve (10). Check valve (7) prevents pilot oil from flowing away from the pilot valve.As the operator moves the pilot valve (STIC Steering), pilot oil travels through neutralizer valves (6) to the steering control valve. Pilot oil acts upon the spool valve (1) that is located in the steering control valve. This allows high pressure steering oil to travel to the steering cylinders. When the neutralizer valve comes in contact with the frame, the neutralizer valve shifts. The pilot oil is then directed back to