CYLINDER GP 7Y4906 - Caterpillar

Note: The following procedure does not require the use of an H bar to hold the liners while the liner projection measurements are taken.The 8T-0455 Liner Projection Tool Group can be used to check the liner projection. Refer to Special Instruction, SMHS7727, "Use of 8T-0455 Cylinder Liner Projection Indicator Group" for more information on the use of the tool.
Illustration 1 g01096458
Liner Projection Components (1) Bolt (2) Washer (3) Washer (4) Spacer plate (5) Cylinder liner (6) Block C13 Procedure
Table 1
Required Tooling    
Part Number    Part Description    Qty    
8T-0455     Liner Projection Tool Group     1    
Table 2
Required Components for C13    
Item    Part Number    Description    Quantity For One Cylinder    Quantity For Six Cylinders    
1     8T-4193     Bolts     6     36    
2     2S-5658     Hard Washers     6     36    
3     8F-1484     Washers     6     36    
4     7K-1977     Washers     6     36    
Clean the cylinder liner flange and the cylinder block surface. Remove any nicks on the top of the cylinder block.
Illustration 2 g01721317
Location of the components (1) Bolt (2) Washer (3) Washer (4) Washer
The components should be assembled in the order that is shown in Illustration 2. 7K-1977 Washer (4) is made of a cotton fabric that is impregnated with resin. The washer will not damage the sealing surface of the cylinder block.Note: Inspect the washer before measuring the liner projection. Replace the washer if the washer is worn or damaged.
Evenly tighten bolts (1) to a torque of 14 N m (10 lb ft).
Illustration 3 g01721370
8T-0455 Liner Projection Tool Group (5) Bolt (6) Dial indicator (7) Gauge body (8) Gauge block
Loosen bolt (5) until dial indicator (6) can be moved. Place gauge body (7) and dial indicator (6) on the long side of gauge.
Slide dial indicator (6) into the correct position. When the point of the dial indicator contacts gauge block (8) , the dial indicator is in the correct position. Slide the dial indicator until the needle of the gauge makes a quarter of a revolution clockwise. The needle should be in a vertical position. Tighten bolt (5) and zero the dial indicator.
Illustration 4 g01721372
Measure the liner projection. (6) Dial indicator (7) Gauge body
Place gauge body (7) on the plate for the cylinder block. The indicator point should be on the liner flange. Read the dial indicator in order to find the amount of liner projection. Check the projection at four locations (every 90 degrees) around each cylinder liner.
Table 3
Specifications    
Liner Projection    
0.06 to 0.18 mm ( 0.0024 to 0.0071 inch)    
Maximum Variation in Each Liner    
0.050 mm (0.0020 inch)    
Maximum Average Variation Between Adjacent Liners    
0.08 mm (0.0031 inch)    
Maximum Variation Between All Six Liners    
0.100 mm (0.0040 inch)    
If a liner does not meet the recommended cylinder liner projection specification, check the following parts:
The depth of the cylinder block bore should be