Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
techtalk:ih:engmech03e [2017/12/20 03:33] hippysmack [Three angle valve seats - 1980 and up FLT/FL/FX/XL models] |
techtalk:ih:engmech03e [2018/01/21 15:16] (current) hippysmack [Three angle valve seats - FLT/FL/FX/XL models] |
||
|---|---|---|---|
| Line 4: | Line 4: | ||
| - | * The MoCo issued a bulletin in June of 1980 stating that all 1980 production models incorporate three angle valve seats on the (intake and exhaust) ports on the heads. | + | * The MoCo issued a bulletin in June of 1980 stating that all 1980 production models incorporate three angle valve seats on the (intake and exhaust) ports on the new -80 heads. ((HD Service Bulletin #M-782 dated June 3, 1980)) |
| - | * In April of 1981, this was reiterated for XL Models starting with cracnkcase (781012001). | + | * In April of 1981, this was reiterated for XL Models starting with crankcase (781012001) with the introduction of new heads for the 81 model year, ((HD Service Bulletin #M-827 dated April 24, 1981)) which were available as replacement for previous year models. |
| - | * There are specific procedures that must be followed when cutting this type of valve seat. Always be sure to reface the valves before you cut the seats. A Neway Valve Seat Cutter (444-HDF) or other quality equipment is recommended for this. ((HD Service Bulletin #M-782 dated June 3, 1980)) | + | * There are specific procedures that must be followed when cutting this type of valve seat. Always be sure to reface the valves before you cut the seats. A Neway Valve Seat Cutter (444-HDF) or other quality equipment is recommended for this. |
| * Follow the procedures outlined in the service manual for removing and re-facing valves and guides and decarbonizing the combustion chamber. | * Follow the procedures outlined in the service manual for removing and re-facing valves and guides and decarbonizing the combustion chamber. | ||
| - Cut the 46° seat angle first. Cut only enough to clean up the seat. | - Cut the 46° seat angle first. Cut only enough to clean up the seat. | ||
