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TUBE 7B0023 - Caterpillar



7B0023 TUBE Caterpillar parts TUBE
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Alternative (cross code) number:
CA7B0023
7B-0023
7B0023
Caterpillar 7B0023 TUBE

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Table 1
Tools Needed Qty
6V-3079 Pressure Hose Assembly 1
6V-4143 Coupler Assembly 2
8T-0856 Pressure Gauge ( 6000 kPa (870 psi)) 1
8T-0860 Pressure Gauge ( 40000 kPa (5800 psi)) 1 Note: Make sure that the filters and the screens are clean before you test any pressures. Make sure that the oil is at operating temperature before you perform this test.Note: Before you perform any tests, visually inspect the entire hydraulic system for oil leaks and for damaged components.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine or release of air pressure or oil pressure can cause injury to persons on or near the machine.To help prevent possible injury before testing and adjusting any air system or hydraulic system, perform the procedure in the Testing and Adjusting, "General Information" section.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00531329
(1) High pressure relief valve
(2) Low pressure relief valve
(3) Hoist dual stage relief valve
(4) Hoist control valve Hoist dual stage relief valve (3) is part of the hoist control valve (4). The relief pressure for the RAISE position is controlled by high pressure relief valve (1). The relief pressure for the LOWER position is controlled by low pressure relief valve (2).Relief Valve Test (High Pressure)
Illustration 2 g00531380
(5) Pressure tap
Lower the dump body. Stop the engine.
Connect a hose assembly with an 8T-0860 Pressure Gauge ( 0 to 40000 kPa (0 to 5800 psi)) to pressure taps (5).
Start the engine. Operate the dump body repeatedly until the temperature of the hydraulic oil


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