812636 Mercury FRICTION SPRING

Start By:a. remove rocker shaft assemblies FLUID SPILLAGE CONTAINMENT Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "TOOLS AND SHOP PRODUCT GUIDE, NENG2500", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates. 1. Thoroughly clean the area around each fuel line connection. Disconnect fuel injection line (1) and fuel injection nozzle (2) from the adapter.2. Remove clamp (3) and the spacer that holds the fuel injection nozzle in place.
Do not use force to remove the fuel injection nozzles. If necessary, turn and pull the fuel injection nozzle out of the cylinder head.
3. Remove adapter (4) and fuel injection nozzle (2). The following steps are for installation of the fuel injection nozzles.
Before the fuel injection nozzles are installed, check for fuel leakage, the pressure at which the injection nozzle opens, and the amount of fuel (spray pattern) that comes out of the nozzle with Tool (A). See the topic "Testing Fuel Injection Nozzles" in the Systems Operation, Testing & Adjusting Manual.
4. Remove carbon seal dam (6) with pliers. Remove compression seal (5). 5. Install a new compression seal on the nozzle. Install a new carbon seal dam with Tool (B).6. Make sure the bore in the cylinder head and the fuel inlet fittings are clean.7. Install new O-ring seals on adapter (4) and fuel injection nozzle (2).8. Install the fuel injection nozzle in the head. Turn and push the nozzle into its correct position. Do notput lubricant on the nozzle or bore in the cylinder head.9. Install adapter (4) in the head. Connect nozzle (2) and fuel injection line (1) to the adapter. Tighten the nuts to a torque of 40 7 N m (30 5 lb ft).10. Install the spacer and clamp (3) that hold the nozzle to the cylinder head. For more detailed information regarding the fuel injection nozzles, see the topic "Fuel Injection Nozzles" in the Specifications Manual.End By:a. install rocker shaft assembliesDisassemble & Assemble Fuel Injection Nozzles (
Start By:a. remove fuel injection nozzles Do not disassemble any nozzle until testing has shown that disassembly is