HARNESS AS-SENSOR 2427392 - Caterpillar

Remove Cylinder Heads
start by:a) remove exhaust manifolds The exhaust manifolds do not have to be removed unless all of the cylinder heads are to be removed.1. Drain the coolant from the cooling system.2. Shut off the fuel supply to the engine. 3. Remove the bolts and remove intake elbow (1) from the cylinder head. 4. Disconnect fuel lines (2) and (4) from fuel manifold (3). Remove bolts (5) and remove fuel manifold (3).5. Remove rocker shaft and push rods. See REMOVE ROCKER SHAFTS AND PUSH RODS for this procedure. 6. Remove the bolts and cover (6) from under the cylinder head to be removed. 7. Remove bolt (8) and cap (7) that hold the fuel control lever to the fuel control shaft. 8. Remove bolts (13) to remove lever assembly (9) and rod assembly (14) as a unit from the cylinder head. 9. If necessary use tool (A) to turn the flywheel until the camshaft is moved in a position so rod assembly (14) can be removed between the engine block and camshaft.10. Remove bolt (10) and clamp (12) from fuel injector (11).
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 remove injector (11) from the cylinder head. 12. Remove fuel lines (17), bracket (16) and elbows (15) from the cylinder head.13. Remove bolts (18) and (20) to remove valve cover base (19) from the cylinder head. 14. Use tooling (B) to fasten a hoist to cylinder head (22). Remove bolts (21) and (23) to remove cylinder head (22) from the engine. The weight of the cylinder head is 45 kg (100 lb.).Install Cylinder Heads
1. Thoroughly clean the spacer plates and bottom surface of the cylinder heads. Install a new head gasket and seals. Do not use any adhesives. A new spacer plate gasket must be installed when the cylinder head is removed. See REMOVE AND INSTALL SPACER PLATE. 2. Fasten a hoist and tooling (A) to the cylinder head with two 3/8"-16 NC bolts and washers as shown. Put the cylinder head into position on the spacer plate. 3. Put clean engine oil 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 N m (22 4 lb.ft.).b) Tighten bolts 1 through 8 in number sequence to a torque of 270 35 N m (200 25 lb.ft.).c) Tighten bolts 1 through 8 in number sequence to a torque of 450 20 N m (330 15 lb.ft.). 4. Install bolts (3) and the washers to hold the cylinder head to the engine.5. Make sure the O-ring seals are installed around the two dowels in the bottom of valve cover base (2). Put the gasket and base (2) in position and install the bolts to hold them to the cylinder head.6. Install elbows