COVER GP-VALVE MECHANISM 4164677 - Caterpillar

Removal Procedure
Start By:
Remove cylinder head.
Remove engine oil pan. Note: Refer to Specification UENR0995 "Engine Design" for non-specified engine Torque Values.
Rotate the crankshaft until the crank pin is at the bottom center position.
Illustration 1 g02797660
Remove bolts (2) and remove connecting rod cap (1).
Illustration 2 g02797658
Carefully push piston (3) and the connecting rod from cylinder block (4) bore.
The connecting rod and the connecting rod cap should have an etched Number (X) on the side. The number on the connecting rod and the connecting rod cap must match. Ensure that the connecting rod and the connecting rod cap are marked for the correct location. If necessary, make a temporary mark on the connecting rod and the connecting rod cap in order to identify the cylinder number.
Illustration 3 g02797689
Remove piston (3) and connecting rod (5). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-6684 Piston Ring Compressor 1
Illustration 4 g02797689
Inspect piston (3) and connecting rod assembly (5).
Apply clean engine oil to the cylinder bore, to the piston rings, to the outer surface of the piston and to the bearing shells. Note: Install the bearing shells for the connecting rods dry when clearance checks are performed. Refer to Disassembly and Assembly, "Bearing Clearance - Check" for the correct procedure. Apply clean engine oil to the bearing shells for the connecting rods during final assembly.Note: Ensure that the piston and the connecting rod assembly are installed in the correct cylinder.
Illustration 5 g02797721
Install Tooling (A) onto piston (3). Note: Ensure that Tooling (A) is installed correctly and that piston (3) can easily slide from the tool.
Illustration 6 g02797658
Carefully push piston (3) and the connecting rod assembly into cylinder block (4) bore and onto the crankshaft pin.
Illustration 7 g02797660
Install connecting rod cap (1) onto the connecting rod . Note: Ensure that etched Number (X) on connecting rod cap (1) matches etched Number (X) on the connecting rod. Ensure the correct orientation of the connecting rod cap. The locating tab for the upper bearing shell and the lower bearing shell should be on the same side.Note: Do not reuse the old connecting rod bolts in order to secure the connecting rod cap.
For the C3.3B apply clean engine oil to bolt threads and install new bolts (2) to the connecting rod. Tighten bolts (2) to a torque of 69 to 73 N m (51 to 54 lb ft).
For the C2.6 apply clean engine oil to bolt threads and install new bolts (2) to the connecting rod. Tighten bolts (2) to a torque of 45 49 N m (33 36 lb ft).
Ensure that the installed connecting rod assembly has side play. Rotate the crankshaft in order to ensure that there is no binding.
Repeat Step 1 through Step 8 in order to install the remaining pistons and connecting rods. End By:
Install engine oil pan.
Install cylinder head.