PLUG 3830313 - 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.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Illustration 1 g01431545
Open center door assemblies (1).
Illustration 2 g01431546
Disconnect harness assembly (2) and all hose assemblies (3).
Illustration 3 g01431548
Attach a suitable lifting device to piston pump (5). The weight of piston pump (5) is approximately 170 kg (375 lb).
Remove bolts (4), piston pump (5), and the O-ring seal.