SEAL 8T8389 - Caterpillar

Installation Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A    9U-6891     Injector Tool Group    1    
B     9U-6862     Tapered Brush     1    
9U-6863 Small Bore Brush     1    
9U-7244 End Brush     1    
9U-7237 Brush Extension     1    
4C-5552 Large Bore Brush     1    
C     4C-9507     Retaining Compound     -    
Use Tooling (B) to clean the bore in the cylinder head for the electronic unit injector sleeve.
Ensure that the electronic unit injector sleeve and the cylinder head bore are completely free of oil, dirt, and sealant debris.
Illustration 1 g01261773
Install new O-ring seals (2) and (3) on electronic unit injector sleeve (1) .Note: Do not apply Tooling (C) to the cylinder head surfaces. Apply Tooling (C) on the electronic unit injector sleeve only.
Apply a thin coat of Tooling (C) to the contact surface of electronic unit injector sleeve (1) at the area that is Marked "X".
Lubricate O-ring seals (2) and (3) with clean engine oil.
Illustration 2 g01261802
Install Tooling (A) into the threads of electronic unit injector sleeve (1) .
Position Tooling (A) and the electronic unit injector sleeve in the cylinder head. Use care not to damage the O-ring seal on the electronic unit injector sleeve.
Ensure that the electronic unit injector sleeve is properly seated in the cylinder head. The Tooling will "RING" when the electronic unit injector sleeve is fully seated in the bore of the cylinder head.
Use Tooling (A) and a hammer to install electronic unit injector sleeve (1) in the cylinder head.
Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Capacities (Refill)" for the cooling system capacity. Refer to Operation and Maintenance Manual, "Cooling System Coolant (DEAC) - Change" or Operation and Maintenance Manual, "Cooling System Extended Life Coolant - Change" for the proper filling procedure.End By: Install the electronic unit injector. Refer to Disassembly and Assembly , "Electronic Unit Injector - Install".