TM-9-2815-210-34-2-2 LDS-465-1/LDS-465-2 Multifuel Engine Maintenance Manual Part 2
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TM 9-2815-210-34-2-2 NOTE If no intake valve seat inserts (1) were taken out, go to frame 23. Two sizes of intake valve seat inserts (1) are used in these cylinder heads (2). Cylinder head can use a combination of intake valve seat insert sizes. Measure each intake valve seat counterbore (3) to tell whether to put in a standard size or oversize intake valve seat insert. Readings must be within limits given in table 4-48. The letter T shows a tight fit. If readings are not within given limits, throw away part and get a new one. 1. Measure and note inside diameter of three intake valve seat counterbores (3). If diameter is 2.0580 to 2.0595 inches, this is a standard size intake valve seat counterbore. If diameter is 2.0680 to 2.0695 inches, this is a 0.0100 oversize intake valve seat counterbore. NOTE Used intake valve seat inserts (1) that were not worn were tagged so they can be put back in the same place. Because machine shop may have machined some standard size intake valve seat counterbores (3) into oversize in- take valve seat counterbores, some intake valve seat inserts may now be too small. 2. Measure and note outside diameter of each intake valve seat insert (1) to be put in. Standard size intake valve seat inserts go in standard size intake valve seat counterbores (3). For 0.0100-inch oversize intake valve seat counterbores, use 0.0100–inch oversize intake valve seat inserts. Refer to table 4-48 for sizes of intake valve seat inserts. 3. Measure fit of each intake valve seat insert (1) in its intake valve seat counter- bore (3). GO TO FRAME 22 4-232 FRAME 21