Timing Gear Train, Front Cover & Camshaft E. 1. a) b) c) d)
Fig. 6
CAMSHAFT BEARING REMOVAL Remove the camshaft. Remove the flywheel. Remove backplate by loosening its bolts. Use a long bar from the front of the crankcase and drive out the expansion plug (1-6). e) Remove the camshaft bearings (2-4) from the crankcase. 2. INSTALLATION a) Press the centre bearing into position aligning the hole in the bearing with the hole in the crankcase. b) Press the front and rear bearings into position ensuring that the edge marked “FRONT” is to the front of the crankcase and that the holes in the bearings line up with those in the crankcase. c) Line bore the bearings to the dimensions in specifications. d) After reaming, blow out the crankcase and oil ways to remove all foreign material. Note: Ensure that the rear bearings is pressed in flush with the front of the bore in the crankcase. Note:
Bearings supplied for service are supplied semi-finished and must be line reamed to specified dimension after assembly. a) After reaming thoroughly blowout the casting and oil ways to ensure that there is no metal deposit left. b) Examine the tappet for signs of wear. c) Do not attempt to straighten or repair the camshaft. If any parts are suspect they must be replaced. Note: When the engine is in the upright position the tappet must be inserted one at a time as the camshaft is installed into the engine because the tappets are held in position by the camshaft. Possible the engine should be supported in an inverted position. a) Place tappet in position. e) Install the rear bearing expansion plug (1-6) expansion plug using a good quality sealer on the plug and seat. f) Install the flywheel. g) Install the camshaft in the crankcase taking care not to damage the bearings. Engage the camshaft gear with the crankshaft pinion to ensure that single timing marks are in line with each other. Secure the thrust plate to the crankcase with bolts and lock washers and tighten to the same specified torque.
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
C-53
