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 FRAME 11 1. 2. 3. 4. 5. GO NOTE Do this frame only if cylinder head (2) was tagged for resurfacing or if any exhaust valve seat (1) was tagged to be machined. Do step 1 only if cylinder head (2) was tagged for resurfacing. If cylinder head was not tagged, do steps 2 thorough 5. Using engine valve seat knockout tool, take out exhaust valve seats (1) not tagged to machined. Tag each exhaust valve seat taken out "front exhaust", "center exhaust” or “rear exhaust” so it can be put back in the same place. Do not take out exhaust valve seats tagged to be machined. NOTE Two sizes of exhaust valve seats (1) are used in these engines. Cylinder head (2) can use a combination of standard and 0.0100-inch oversize exhaust valve seats. Measure inside diameter of exhaust valve seat counterbore (3) for each exhaust valve seat (1) taken out. If diameter of exhaust valve seat counterbore (3) is 1.8080 to 1.8095 inches, this is a standard size exhaust valve seat counterbore. If diameter is 1.8180 to 1.8195 inches, this is a 0.0100-inch oversize exhaust valve seat counter- bore. If diameter is more than 1.8195 inches, get a new cylinder head (2). If inside diameter of exhaust valve seat counterbore (3) is more than 1.8095 inches but smaller than 1.8180 inches, tag this exhaust valve seat counterbore to be machined to 0.0100-inch oversize by machine shop. Check that exhaust valve seat counterbore (3) is not damaged. If a 0.0100- inch oversize intake valve seat counterbore is damaged, get a new cylinder head (2). If a standard size intake valve seat counterbore is damaged, tag it to be machined to 0.0100-inch oversize by machine shop. TO FRAME 12 4-221