TUBE AS 3680456 - Caterpillar

Use the spacer plate again.
Illustration 13 g01533993
The spacer plate was damaged from unacceptable methods of cleaning.Do not use the spacer plate again.Dimensions for the Aluminum Washer
The aluminum spacer plate on some 3408 and 3412 engines has been modified. The plates now provide adequate material around the oil supply holes to the rocker arms for the O-ring seal. The holes were counterbored from the bottom side only in order to accept an aluminum washer. This aluminum washer is not available for parts service. The spacer plate was machined in order to provide a press fit for the washer. Table 3 contains the dimensions for machining the washers.
Table 3
Dimensions of the Aluminum Washer    
Description     Dimension    
Thickness    
3.700 0.025 mm (0.1457 0.0010 inch)    
Outside Diameter    
27.000 0.025 mm (1.0630 0.0010 inch)    
Inside Diameter    
9.900 2.500 mm (0.3898 0.0984 inch)    Note: Clean the counterbore in the spacer plate before installing a new aluminum washer. Do not use adhesive.Liner Projection
Precautions For Measuring Liner Projection
Do not use steel washers or excessive torque in order to hold down the spacer plate during measuring the liner projection. Use brass and fibrous washers under bolts in order to hold down the spacer plate. Torque the bolt to the correct torque in order to prevent damage to the spacer plate. The correct torque is 95 N m (70.0 lb ft).
Illustration 14 g01983774
Proper setup for measuring liner projection (11) Spacer plate (18) 7H-3598 Bolt (19) 8F-1484 Hard Washer (19) 7X-0564 Hard Washer (20) 7K-1977 Plastic Washer (20) 126-1454 Plastic Washer (21) Cylinder liner (22) Cylinder blockMeasuring the Liner Projection
Illustration 15 g01534096
Chart for recording liner projection measurements
Install a new spacer plate gasket and a clean spacer plate.
Install the cylinder liners in the cylinder block without seals or bands.
Install the washers.
Install all the bolts or the six bolts around the liner. The correct torque for these bolts is 95 N m (70.0 lb ft).
Illustration 16 g01984363
Measure the liner projection at location (A), (B), (C), and (D) . (23) Use four 7X-0564 Hard Washer and four 126-1454 Plastic Washer . (24) Use two 8F-1484 Hard Washer and two 7K-1977 Plastic Washer .
Use 8T-0455 Liner Projection Tool Group in order to measure the liner projection at the four locations.
Record the measurements for each cylinder.
Add the four measurements for each cylinder. Divide the sum of the measurements by four in order to find the average value.
Table 4
Specifications    
Liner projection    
0.025 mm to 0.152 mm (0.0010 inch to 0.0060 inch)    
Maximum variation in each liner    
0.051 mm (0.0020 inch)    
Maximum average variation between adjacent liners    
0.051 mm (0.0020 inch)    
Maximum variation between all liners    
0.102 mm (0.0040 inch)    Note: If the liner projection changes around the liner, turn the liner to a different position within the bore. If the liner projection is not within specifications, move the liner to a different