PIPE AS 3453646 - Caterpillar

Removal procedure
Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "System Pressure - Release". Note: Put identification marks on all hoses, on all hose assemblies, on all harness assemblies, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Turn the battery disconnect switch to the OFF position.
Illustration 1 g01437556
Attach a suitable lifting device to top grill assembly (1). The weight of top grill assembly (1) is approximately 57 kg (125 lb). Remove the bolts and remove top grill assembly (1). Repeat for the bottom grill assembly (2).
Illustration 2 g01437559
Disconnect hose assemblies (3) and remove the split flanges. Remove bolts (4), makeup valve (5), and the O-ring seals.