PAD 2H7795 - Caterpillar

(13) Check the face and bore alignment again and make corrections as necessary. Check the coupling clearance, dimension (X). (14) Drill the mounting holes through the engine bed using the holes in the engine mounting rails as a guide. Use dowels or fitted bolts at locations (E) of the mounting rails. Clearance type bolts must be used at all other locations. The holes for the dowels or fitted bolts must be an interference fit. Holes for clearance type bolts must be .06" (1.5) less than the diameter of the holes in the engine mounting rails.(15) Either steel shims or poured resin shims can be used between the engine rails and engine bed or between the supports for the remote mounted transmission and the engine bed.(16) If steel shims are to be used, see MOUNTING MARINE TRANSMISSIONS AND ENGINES WITH STEEL SHIMS on page 6.(17) If poured resin shims are to be used, see MOUNTING MARINE TRANSMISSIONS AND ENGINES WITH POURED RESIN SHIMS on page 8.(18) After the shims have been installed and the mounting nuts tightened, again check the face and bore alignment to be sure that it is correct.(19) If there are alignment marks on the outside diameter of the companion flange and output flange, rotate the output flange until these marks are in alignment. Move the tailshaft forward until the flange faces are in full contact. Install the flange bolts and tighten them to their specified torque.(20) After alignment has been completed and all anchor bolts have been tightened to their final torque, the engine crankshaft deflection check, shown on page 31, must be performed on all engines (except D346 and D379 engines) with mounting rails and engine side covers.Checking Engine Crankshaft Deflection
The following procedure must be used on all D348, D349, D398 and D399 Engines after alignment of the marine transmission and engine, and after installation of the shims and anchor bolts. Do this procedure with both a cold engine and a hot engine. (1) Remove the inspection cover from the side of the cylinder block to expose the crankshaft center main bearing journal. Rotate the crankshaft until the counterweights on the center throw are just past the connecting rods. Install a Starrett Crankshaft Distortion Dial Gauge No. 696 with a No. 696B Balancer Attachment on either side of the center main bearing journal with the indicator pivot points positioned approximately .25" (6.4) from faces (A) and/or (B) as shown.(2) Zero the dial indicator. Make sure the indicator pivot points are seated properly by rotating the gauge about its own axis until it will hold a zero reading. Continue to rotate the crankshaft from the starting position until the gauge approaches interference with the connecting rod on the opposite side. Continuously observe the gauge reading while rotating the crankshaft through approximately 300° of rotation.(3) Rotate the crankshaft back to the original starting position. The indicator reading must return to zero at the original starting position in order to make a valid test. If the