3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Caterpillar


Cylinder Head Assemblies

Usage:

Remove Cylinder Head Assemblies

Start By:

a. remove exhaust manifolds

b. remove push rods and valve lifters

c. remove water temperature regulators

NOTE: Put protection caps on all fuel openings.

1. Remove the bolts and valve cover base (1) from the cylinder head assembly.

2. Disconnect hose (2) from the cylinder head assembly.

3. Put identification marks on wires (3), and disconnect them from the sending unit.

4. Remove six head bolts (4), and install Tooling (A).

5. Fasten a hoist to Tooling (A), and remove the remainder of the bolts that fasten the head assembly.

6. Remove cylinder head assembly (5). The weight of the head assembly is 102 kg (224 lb).

NOTE: A new spacer plate gasket must be installed when the cylinder head is removed. See Remove & Install Spacer Plate.

Install Cylinder Head Assemblies

1. Thoroughly clean the spacer plates and bottom surface of the cylinder head assemblies. Install a new head gasket and seals. Do not use any adhesives.

NOTE: A new spacer plate gasket must be installed when the cylinder head assembly is removed. See Remove And Install Spacer Plate.

2. Fasten Tooling (A) to the cylinder head assembly, and put cylinder head assembly (1) into position on the spacer plate.

NOTE: The use of guide bolts will help put the cylinder head assembly in alignment with the spacer plate.


(1) Large bolts (3/4 in). Put 6V-4876 Molycoat Paste Lubricant on the threads and between washer and underside of the cylinder head bolts. (2) Small bolts (3/8 in). See Step 3h.

3. Install cylinder head bolts and washers. Tighten the bolts in the following sequence:

a. Tighten bolts 1 through 10 in number sequence to 270 ± 25 N·m (200 ± 20 lb ft)

b. Tighten bolts 1 through 10 in number sequence to 470 ± 20 N·m (345 ± 15 lb ft)

c. Tighten bolts 1 through 10 in number sequence again to 470 ± 20 N·m (345 ± 15 lb ft).

d. Install the rocker arm shafts for the engine valves.

e. Tighten bolts 11 through 18 in number sequence to 270 ± 25 N·m (200 ± 20 lb ft).

f. Tighten bolts 11 through 18 in number sequence to 450 ± 20 N·m (330 ± 15 lb ft).

g. Tighten bolts 11 through 18 in number sequence again to 450 ± 20 N·m (330 ± 15 lb ft).

h. Tighten the nine small bolts (2) to 45 ± 7 N·m (33 ± 5 lb ft).

4. Connect hose (3) and the wire assembly to the cylinder head.

5. Install valve cover base (2) to the cylinder head. Tighten the bolts to a torque of 14 ± 4 N·m (10 ± 3 lb ft) and the sequence as shown.

End By:

a. install water temperature regulators

b. install push rods and valve lifters

c. install exhaust manifolds

Caterpillar Information System:

3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Rocker Shaft Assemblies
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Push Rods, Valve Lifters & Valve Bridges
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Valve Covers
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Camshaft Rear Gear & Balancer
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Camshaft Idler Gear
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Camshaft Bearings
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Camshaft
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Timing Gear Cover
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Governor Control Cylinder
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Governor Shutoff Solenoid
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Crankshaft Front Seal & Wear Sleeve
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Water Pump
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Valves
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Valve Seat Inserts
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Valve Guides
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Bridge Dowels
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Spacer Plates
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Pistons & Connecting Rods
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Piston Cooling Tubes
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Cylinder Liners
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Connecting Rod Bearings
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Crankshaft Main Bearings
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Crankshaft
3408C DIESEL ENGINE FOR CATERPILLAR BUILT MACHINES Crankshaft Rear Seal & Wear Sleeve
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