COVER AS 2485219 - Caterpillar

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.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: The pilot relief valve is located in the oil filter base which is located on the hydraulic filters on the hydraulic tank.
Illustration 1 g01729295
Remove cap (1) from the hydraulic tank.
Illustration 2 g01729354
Install Tooling (A) onto the hydraulic tank. Attach an air supply hose onto Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull a vacuum on the hydraulic system.
Open the right rear door to the pump compartment.
Illustration 3 g01748133
Remove pilot relief valve (2) from the oil filter base.
Illustration 4 g01748156
Note: The individual components of the relief valve are nonserviceable. Do not disassemble the relief valve.
Remove O-ring seal (3) from the pilot relief valve.
Remove O-ring seal (4) from the pilot relief valve.
Remove O-ring seal (5) from the pilot relief valve.Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     FT-2674     Vacuum Cap     1    
B     1U-6396     O-Ring Assembly Compound     1    
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.
Note: O-ring seals should always be replaced. A used O-ring seal may not have the same sealing properties as a new O-ring seal.
Illustration 5 g01748156
Apply Tooling (B) to a new O-ring seal (5). Install new O-ring seal (5) on the pilot relief valve.
Apply Tooling (B) to a new O-ring seal (4). Install new O-ring seal (4) on the pilot relief valve.
Apply Tooling (B) to a new O-ring seal (3). Install new O-ring seal (3) on the pilot relief valve.
Illustration 6 g01748133
Install pilot relief valve (2) in the oil filter base. Tighten pilot relief valve (2) to a torque of 117 9 N m (86 7 lb ft).
Illustration 7 g01729354
Remove Tooling (A) .
Illustration 8 g01729295
Install cap (1) onto the hydraulic tank.
Check the hydraulic system oil level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
Adjust the pilot relief valve pressure. Refer to Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust".