Camshaft and Timing Gear Train If bushing diameter exceeds wear limit, replace bushing. Camshaft Bore I.D. - 3TN66: Standard . . . . . . . . . . . . . . 36.00 - 36.025 mm . . . . . . . . . . . . . . . . . . . . . . .(1.417 - 1.418 in.) If bushing clearance (bushing I.D. minus camshaft journal O.D.) exceeds specification, replace bushing, camshaft or both. Wear Limit. . . . . . . . . . . 36.10 mm (1.421 in.) To replace bushing: Clearance . . . . . . . . . . . . . 0.18 mm (0.007 in.) Remove bushing using a chisel. Be careful not to push bushing inside of engine. Align oil holes in new bushing and cylinder block. Install bushing using a driver set. Camshaft Bore I.D. - 3TNA72 (3009): Standard .
. . . . . . . . . . . . . 40.00 - 40.025 mm . . . . . . . . . . . . . . . . . . . . . . .(1.575 - 1.576 in.) 1 NOTE: Flywheel housing/plate must be removed to measure camshaft intermediate and flywheel end bearing diameters. Wear Limit. . . . . . . . . . . 40.10 mm (1.579 in.) Clearance . . . . . . . . . . . . . 0.18 mm (0.007 in.) 7. Measure intermediate and flywheel end camshaft bore diameters using the following procedures: If bore diameter exceeds wear limit, replace cylinder block. Remove flywheel housing/plate. (See Crankshaft, Main Bearings and Flywheel in this section.) If bore clearance (bore I.D.
minus camshaft journal O.D.) exceeds specification, replace camshaft, cylinder block or both. Remove plug using a long wooden dowel. Insert wooden dowel through gear housing side. Apply John Deere Form-In Place Gasket, or an equivalent, on outer edge of plug. Install plug until it bottoms in bore. Install flywheel housing/plate. CAM FOLLOWERS Removal/Installation Plug 1. Remove cylinder head. (See Cylinder Head, Valves and Manifold in this section.) M35287 IMPORTANT: Cam followers must be installed in the same bores from which they were removed. Measure intermediate and flywheel end camshaft bore diameters. 2. Put a mark on each cam follower and cylinder block bore to aid in installation. 3.
Remove cam followers. Intermediate Bores 4. Inspect all parts for wear or damage. (See Inspection procedures.) 5. Apply clean engine oil on all parts during installation. Flywheel End Bore Installation is done in the reverse order of removal. M82073 4/7/95 1-59 AllTractorManuals.com