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RING-PISTON 5088262 - Caterpillar



5088262 RING-PISTON Caterpillar parts RING
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Alternative (cross code) number:
CA5088262
508-8262
5088262
Caterpillar 5088262 RING-PISTON

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Table 4
REQUIRED TOOLS    
Part Number     Description     Qty    
1P-2377     Plug As     2    
030-8370     Pipe Adapter     2    
Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
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.
Do not adjust the main relief valve above the specified pressure. Adjustment of the main relief valve above the specified pressure may cause damage to the gear pump.
Lower the boom to the ground.
Engage the parking brake. Stop the engine.
Release the hydraulic system pressure. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release" for the correct procedure.
Turn the key to the OFF position.
Raise the cab. Refer to Operation and Maintenance Manual, "Cab Support Operation" for the proper procedure.
Illustration 1 g01138070
(1) Line relief valve for Lift Raise (2) Line relief valve for Tilt Forward (3) Line relief valve for Tilt Back (4) Line relief valve for Auxiliary
Remove the line relief valve that will be tested.
Illustration 2 g01357866
(5) Line Relief Valve (A) Tooling (B) Tooling (C) Tooling
Assemble tooling (B), as shown. Secure tooling (B) in a suitable holding device.
Install tooling (A) to tooling (B) .
Install tooling (C) to tooling (B) .
Install the line relief valve (5) that will be tested. Install relief valve (5) to tooling (B) .
Turn the electric hydraulic pump to the ON position. Check for leaks at the connection.
The 3S-6224 Electric Hydraulic Pump only has a 7.6 L (2 US gal) reservoir. Pump damage may result if the pump is operated with an empty reservoir.
Slowly increase the pressure. Record the pressure, when the line relief valve opens. Compare this pressure to Table 5.
Stop the pump.
Table 5
LINE RELIEF VALVE PRESSURES    
Position     236B2/ 252B2    
Lift Cylinder Head
RAISE position    
27600 700 kPa (4003 102 psi)    
Tilt Cylinder Head
TILT FORWARD position    
24500 700 kPa (3554 102 psi)    
Tilt Cylinder Rod
TILT BACK position    
27600 700 kPa (4003 102 psi)    
Auxiliary Circuit    
24500 700 kPa (3554 102 psi)    
Illustration 3 g01355331
(6) Adjustment screw (7) Cap (8) Locknut
If the line relief valve is within the specification, go to Step 16. If the line relief valve is not within the specification, then an adjustment is required.
Remove cap (7). Loosen locknut (8) and turn adjustment screw (6)


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