Product Description Features APPLICATION Works on engines 6-404 and 6-466 found in tractor models 4000 4010 4020 4040 4230 4240 4250 4320 4430 4440 4450 4520 4620 4630 4640 4650 4840 4850 6076 6081 6466 7020 8430 8440 8450. Works on engines 6-404 and 6-466 found in combine models 6600 6602 6620 6622 7700 7720 7722 8820. FUNCTION Use to simultaneously install the Teflon unitized seal and wear sleeve on the engine rear crankshaft flange SUPERIOR QUALITY Constructed from high standard forged steel for strength, durability, and longevity; .