SEAL-O-RING 1S7408 - Caterpillar

Removal Procedure
Start By:
Remove the aftercooler.
Remove the exhaust manifold.
Remove the rocker shaft and pushrods.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids 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.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand.Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.
Note: Place identification marks on all lines, on all hoses, on all wires and on all tubes for installation purposes. Plug all lines, all hoses, and all tubes. This will help to prevent fluid loss and this will help to keep contaminants from entering the system.
Illustration 1 g01957317
Loosen hose clamp (4) and disconnect hose (5).
Remove bolts (6) and brace (7).
Attach a suitable lifting device on the engine lifting group. The weight of cylinder head (3) is approximately 120 kg (265 lb).
Remove bolts (1) and bolts (2).
Remove cylinder head (3), the gasket assemblies, and the plate.