Camshaft and Timing Gear Train Inspection Cam Follower Bore I.D. - 3TN66: Inspect cam follower contact surface for abnormal wear. Replace if necessary. Standard . . . . . . . . . . . . . . 18.00 - 18.018 mm . . . . . . . . . . . . . . . . . . . . .(0.7087 - 0.7094 in.) Wear Limit. . . . . . . . . . . 18.05 mm (0.711 in.) Clearance . . . . . . . . . . . . . . . 0.032 - 0.068 mm . . . . . . . . . . . . . . . . . . . . .(0.0013 - 0.0027 in.) 1 Cam Follower Bore I.D. - 3TNA72 (3009): Standard . . . . . . . . . . . . . . 21.00 - 21.021 mm . . . . . . . . . . . . . . . . . . . . .(0.8268 - 0.8276 in.) Wear Limit. . . . . . . . . . .
21.05 mm (0.829 in.) M82293A Abnormal Contact Normal Contact Clearance . . . . . . . . . . . . . . . 0.040 - 0.094 mm . . . . . . . . . . . . . . . . . . . . .(0.0016 - 0.0037 in.) Measure cam follower diameter. If cam follower bore diameter exceeds wear limit, replace cylinder block. If bore clearance (bore I.D. minus follower stem O.D.) exceeds specification, replace cam follower, cylinder block or both. TIMING GEAR COVER - 3TN66 Removal/Installation 1. Remove alternator and belt. 2. Remove fan, spacer, if equipped, and pulley. Cam Follower O.D. - 3TN66: 3. Remove crankshaft pulley cap screw and washer. Standard . . . . . . . . . . . . . 17.950 - 17.968 mm . . . . . . . . . . . . . . . . .
. . . .(0.7067 - 0.7074 in.) 4. Remove crankshaft pulley using a two-jaw puller kit. Wear Limit. . . . . . . . . . . 17.93 mm (0.706 in.) 5. Remove tachometer, if equipped. Cam Follower O.D. - 3TNA72 (3009): Pulley Spacer (655 CUT Only) Standard . . . . . . . . . . . . . 20.927 - 20.960 mm . . . . . . . . . . . . . . . . . . . . .(0.8239 - 0.8252 in.) Wear Limit. . . . . . . . . . . 20.93 mm (0.824 in.) If diameter is less than wear limit, replace cam follower. Measure cam follower bore diameter in cylinder block. Cap Screw (4) 11 N•m (96 lb-in.) M82294A 1-60 4/7/95 AllTractorManuals.com M35268