RECTIFIER AS 9Y7170 - Caterpillar

Start By:a. remove exhaust manifold The exhaust manifolds do not have to be removed unless all the cylinder head assemblies are to be removed.1. Drain the coolant from the cooling system.2. Shut off the fuel supply on the engine. 3. Remove fuel lines (2), thermocouple (1) and the fuel line manifold from the cylinder head assembly. 4. If equipped, disconnect hose assembly (4) from water manifold (3). Remove the bolts to remove a section of water manifold (3) and elbow (6) from the cylinder head assembly.5. Remove bracket (5) from the cylinder head assembly. Air inlet elbow (7) does not have to be removed from the cylinder head assembly, only the bolts that hold the elbow to the cylinder head assembly.6. Remove the bolts, and remove air inlet elbow (7) from the cylinder head assembly. 7. Remove the access cover from under the cylinder head assembly. Remove the bolt and cap (9) to disconnect rod assembly (8) from fuel control shaft (10).8. Remove the rocket shaft assemblies and push rods. See the topic, Remove Rocker Shaft Assemblies And Push Rods, for this procedure. 9. Remove bolts (14) to remove lever assembly (13) and rod assembly (8) as a unit from the cylinder head assembly. If the lower end of rod assembly (8) does not have enough clearance to be removed, use tool (A) to turn the flywheel until the lower end of rod assembly (8) can be removed between the camshaft and engine block.10. Remove the bolt and clamp (12) from the fuel injector.
Do not put a force on the fuel injection rack or cause damage to it when the injectors are removed.
11. Use a pry bar to loosen fuel injector (11). Remove fuel injector (11) from the cylinder head assembly. 12. Remove the bolts to remove valve cover base (15) and the gasket from the cylinder head assembly. 13. Fasten a hoist to cylinder head assembly (16) with tooling (B). Remove all of bolts (17) and (18) to remove cylinder head assembly (16) from the engine. The weight of the cylinder head assembly is 47 kg (105 lb). 14. Remove head gasket (19), the seals, the spacer plate and spacer plate gasket from the engine.Install Cylinder Head Assemblies
Thoroughly clean the spacer plate and bottom surface of the cylinder head assembly. A new spacer plate gasket must be installed when the cylinder head assembly is removed.1. Install the spacer plate gasket and spacer plate. See the topic, Install Spacer Plate. 2. Install head gasket (19) on the spacer plate. Do not use any adhesives.
Before installation of the cylinder head assembly make sure the 4D514 Plug at location (X) is installed.
3. Fasten a hoist to cylinder head assembly (16). Put the cylinder head assembly in position on the spacer plate. 4. Put 5P3931 Anti-Seize Compound on the threads of the cylinder head bolts. Install the cylinder head bolts and washers. Tighten the bolts in the following sequence:a. Tighten all of the bolts to a torque of 30 5