VALVE GP-PILOT 2121307 - Caterpillar

Ensure that the engine is stopped before any servicing or repair is performed.
Ensure that Diesel Exhaust Fluid (DEF) for the system 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.Dispose of all fluids according to local regulations and mandates.
Ensure that the area around the DEF manifold is free from contamination before any servicing or repair is performed.There are two different designs of manifold that could be installed on your application.Refer to Special Publication, NENG2500, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Note: Refer to Special Instruction, REHS8231, "Removal Procedures for Diesel Exhaust Fluid (DEF) Connectors" for the correct removal procedure of hose assemblies (1) and (5).
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Clamp off hoses (1).
Remove clips (2) and (3). Disconnect harness assemblies (4). Remove hose assemblies (1) and (5).
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Remove bolts (6), plate (7), tank manifold (8), and gasket (not shown).Type 1 Manifold
Remove the manifold, refer to Disassembly and Assembly, "Manifold (DEF Heater) - Remove and Install" for the correct procedure.
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Remove band clamp (2) from filter base (1).
Remove filter (3) from filter base (1).
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Remove the suction filter (4) at the bottom of the header coils by pulling tabs (5). Replace with a new suction filter.
Install new filter by pulling filter over the manifold coils up to the bottom of the assembled filter base.
Ensure that the band clamp is aligned, as shown in illustration 6, to the flat section on the filter base. Tighten the band clamp to 4.5 0.7 N m (40 6 lb in) (1). Ensure that the filter does not bunch when tightening the band clamp.
Install the manifold, refer to Disassembly and Assembly, "Manifold (DEF Heater) - Remove and Install" for the correct procedure.Type 2 Manifold
To remove the DEF manifold and the hoses connections from the DEF tank, refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install.
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Note the location of clamp (2). The clamp (2) must be between the marked location (A).
Loosen clamp (2) and remove outer filter (3) from DEF tank header (1) and discard outer filter (3).
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Remove screws (7) and remove retaining plate (6).
Remove DEF filter (5) from pickup tube (4) and discard the used filter (5).
Install new filter (5) onto pickup tube (4).
Install the retaining plate (6) and install screws (7). Tighten screws (7) to a torque of 1.1 N m (9.8 lb in).
Install new outer filter (3) onto DEF tank header (1). Ensure that the clamp (2) is located between the location points (A).
Tighten clamp (2) to a torque of 4.5 N m (40 lb in).
Install the DEF tank header, refer to Disassembly and Assembly, Manifold (DEF Heater) - Remove and Install.