Work for John Deere 3179 4239 6359 4276 6414 3029 4039 6059 6068 6619 Engines. Suitable for engines with 142 tooth flywheel ring gear and a 26.5 mm (1.04 in.) ID flywheel housing guide bore diameter. Alternative to OEM JDE83 & JDE81-4. Used to rotate engine flywheel: To lock engine at "TDC" to check high pressure fuel pump timing. To check damper radial runout and piston protrusion. To check camshaft-to-crankshaft timing. .
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