Checking Liner Protrusion

Fig. 20 Measuring Cylinder Liner Protrusion:

1. Install liners in block without O-ring seal.
2. Install dial indicator in gauge block Mot. 251.01 and tighten screw clamp, Fig. 20.
3. Place thrust plate Mot. 252.01 across each cylinder liner, Fig. 20, and measure liner protrusion above block with dial indicator. Liner protrusion should be between .003 to .006 inch.
4. If liner protrusion is not within specifications, measure protrusion of replacement liner to determine whether liner or cylinder block is defective, and replace components as needed.
5. When protrusion of all liners is within specifications, arrange liners so that the difference in protrusion between adjacent liners does not exceed .002 inch, and so that the protrusions are stepped down from the No. 1 cylinder to the No. 4 cylinder.
6. After the liner protrusion has been checked, remove the liners from the block and assemble the piston, rod and liner assemblies as outlined.