ROD AS 7Y5157 - Caterpillar

Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Guide Stud 2
B 8T-3052 Degree Wheel 1
C 207-1601 Rubber Lubricant -
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Thoroughly clean the top of the cylinder block and the bottom of the cylinder head. Ensure that there is no debris in the cylinder bores, the coolant passages, and the lubricant passages.Note: Thoroughly clean the hole in the cylinder head for the gas that is ventilated from the crankcase. Ensure that the hole is not restricted by debris and/or oil deposits.
Illustration 1 g01232199
Typical example
Install the cylinder head gasket (2) on the dowels (3) on top of the cylinder block (1). Note: Do not use any sealant or compound on the cylinder head gasket (2).
Install the Tooling (A) in the cylinder block (1).
Use a suitable lifting device to install the cylinder head. Note: Ensure that the cylinder head is positioned on dowels (3). Take care not to damage the machined surfaces of the cylinder head during installation.
Remove the Tooling (A).
Illustration 2 g00951563
Clean the threads of the setscrews that secure the cylinder head. Inspect the threads of the setscrews that secure the cylinder head. Note: Do not use the setscrews if there is any visual reduction in the diameter of the threads (Y) that has not been engaged with the cylinder block. Use a straight edge to check the bolts.
Apply clean engine oil to the threads and the shoulder of the setscrews that secure the cylinder head before installation.
Illustration 3 g01039487
Install the setscrews in cylinder head. Note: The short setscrews are installed in holes that are marked 2, 5, 6, 7 and 8.Note: The long setscrews are installed in holes that are marked 1, 3, and 4.
Tighten the setscrews in numerical order to a torque of 50 N m (37 lb ft). Refer to Illustration 3.
Tighten the setscrews in numerical order to a torque of 100 N m (74 lb ft). Refer to Illustration 3.
Illustration 4 g01151296
Use the Tooling (B) to achieve the correct final torque. Note: If the Tooling (B) is not available, place an index mark on each setscrew.
Tighten the setscrews in numerical order. Refer to Illustration 3.
Turn the short setscrews (2, 5, 6, 7, 8, 9, and 10) for an additional 225 degrees.
Turn the long setscrews (1, 3, and 4) for an additional 270 degrees.
Illustration 5 g01232637
Typical example
Install new O-ring seals on the bypass tube (4). Apply Tooling (C) to the O-ring seals. Install the bypass tube (4) in the cylinder head. Install the setscrews (5). Tighten the setscrews to a torque of 22 N m (16 lb ft).
Connect the tube assembly to the cylinder head.
Connect the harness assembly to the coolant temperature sensor.
Install the bolt and the fuel line to the cylinder head.
Fill the cooling system with coolant. Fill the lubrication system with engine oil. Note: Refer to Operation and Maintenance Manual, "Refill Capacities" for the cooling system capacity and the lubrication system capacity of the engine.End By:
Install the glow plugs. Refer