PISTON 1211451 - Caterpillar

Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that number one piston is at the top center position on the compression stroke. Refer to Systems Operation, Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Illustration 1 g01335808
Typical example
Ensure that the mating surfaces of housing (5) and fuel injection pump (6) are clean and free from damage.
Install a new O-ring seal (14) to housing (5) .
Position housing (5) on fuel injection pump (6). If the original fuel injection pump is installed, ensure that the appropriate marks on the flange of the fuel injection pump and the housing are aligned. Install nuts (15) finger tight.
Tighten nuts (15) to a torque of 18 N m (13 lb ft).
Install a new O-ring seal (13) to housing (5). Install gear (12) to fuel injection pump (6). Install nut (11) finger tight.
Illustration 2 g01375471
Typical example
Illustration 3 g01375914
Timing marks on the gears
Install the assembly of housing (5) and fuel injection pump (6) to the engine. Ensure that Timing marks (X) on the teeth of the gears are in the correct position. Install bolt (7) finger tight.
Position bracket (9) on fuel injection pump (6). Install fasteners (8) and bolt (10) finger tight.
Tighten nut (11) to a torque of 90 N m (66 lb ft). Refer to Illustration 1.
Illustration 4 g01335768
Typical example
Install a new O-ring seal (3) to plate (2) .
Position plate (2) on front housing (1). Install bolts (4). Tighten the bolts to a torque of 18 N m (13 lb ft).
Tighten bolt (7) to a torque of 18 N m (13 lb ft). Tighten bolt (10) to a torque of 18 N m (13 lb ft). Tighten fasteners (8) to a torque of 35 N m (26 lb ft). Refer to Illustration 2.
Adjust the fuel injection pump timing. Refer to Systems Operation, Testing and Adjusting, "Fuel Injection Timing - Check".End By: Install the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines - Remove and Install".