RACE & ROLLER ASSEMBLY 1M6849 - Caterpillar

Engine: All 3600 All C280 All G3600Introduction
This Special Instruction explains the alignment procedure for 3600 engines with two-bearing generators. Do not start the alignment procedure until the electric set is permanently installed. If the generator set is moved to a different location, check the alignment and make any corrections necessary. Alignment between the generator and the engine must be correct to get the maximum performance and the longest life from the generator set. Refer to Illustration 1 in order to view the different parameters for alignment.Procedure For Alignment
Review the components of the complete installation. When the weight of any attachment or fluid compartment exceeds 225 kg (500 lb), fill the compartment or simulate the weight of the fluid before you proceed with the alignment.
Attach the isolators to the base. The clearance between the floor and the bottom of the base should be at least 25.4 mm (1.00 inch).Level the isolators. Refer to Special Instruction, SEHS9162 for details on the procedure.
The end play of the crankshaft should be 0.4 0.2 mm (0.016 0.008 inch). The inspection of the end play of both the crankshaft and the generator shaft must be performed. This inspection will ensure that the thrust bearings for the generator and the engine bearings are not damaged during operation.Note: In order to protect the bearings against damage, prelube the engine and the generator before rotation.In order to protect the generator bearings from damage, lubricate the generator bearings before any axial movement. Also lubricate the shafts before the shafts are turned. If the generator is not equipped with a pump for prelube, drain the oil from the bearing into a clean container. Replace the drain plug. Refill the bearing with the oil from the top. This procedure will provide the prelube that is needed to turn the shaft.Check the end play of the crankshaft by attaching a dial indicator to the engine block or a stationary surface. Clean the surface of the following materials: grease, dirt and protectant. The reading can be taken in one of two areas. In order to gain access to the first area, remove a side cover from the engine block. Install the indicator rod against the crankshaft at the counterweight or some other suitable location on the crank. For the second area, install the indicator rod against the flywheel at the rear of the engine. Avoid the flexible part of the coupling.Use a clean pry bar against the crankshaft in order to move the crankshaft back and forth. The crankshaft may be difficult to move. If necessary, prelube the crankshaft in order to reduce the force that is required to move the crankshaft. Repeat the measurements several times in order to verify the results.Note: Never pry on the damper in order to check the end play of the crankshaft.
The split flange will not be installed for rough alignment. Install two alignment bolts at an angle of 180 degrees between the drive flange for the generator and the adapter. (Do not install