Category Archives: L2501

1. Check the wear on the crankshaft sleeve (1). 2. If the wear exceeds the allowable limit or when the engine oil leaks, replace the crankshaft sleeve (1).  

1. Put a strip of plastigage on the center of the journal. 2. Install the bearing case and tighten the baring case screws 1 to the specified torque, and remove the bearing case        again. 3. Measure the amount of the flattening with the scale and get the oil clearance. 4. If the… Read More »

(When removing) 1. Press out the used crankshaft bearing 1 (2) using a crankshaft bearing 1 replacing tool. (When installing) 1. Clean a new crankshaft bearing 1 (2) and crankshaft journal bore, and apply engine oil to them. 2. Using a crankshaft bearing 1 replacing tool, press in a new bearing 1 (2) so that… Read More »

1. Measure the O.D. of the crankshaft journal with an outside micrometer. 2. Measure the I.D. of the crankshaft bearing 1 with an inside micrometer, and calculate oil clearance. 3. If the clearance exceeds the allowable limit, replace the crankshaft bearing 1. 4. If the same size bearing is useless because of the crankshaft journal… Read More »

1. Clean the crankpin and crankpin bearing. 2. Put a strip of plastigage on the center of the crankpin. 3. Install the connecting rod cap and tighten the connecting rod screws to the specified torque, and remove the cap        again. 4. Measure the amount of the flattening with the scale, and get… Read More »

1. Support the crankshaft with V blocks on the surface plate at both end journals. 2. Set a dial indicator with its tip on the intermediate journal. 3. Measure the crankshaft alignment. 4. If the measurement exceeds the allowable limit, replace the crankshaft.  

1. Set a dial indicator with its tip on the end of the crankshaft. 2. Measure the side clearance by moving the crankshaft to the front and rear. 3. If the measurement exceeds the allowable limit, replace the thrust bearings. 4. If the same size bearing is useless because of the crankshaft journal wear, replace… Read More »

1. Install the piston pin into the connecting rod. 2. Install the connecting rod on the connecting rod alignment tool. 3. Put a gauge over the piston pin and move it against the face plate. 4. If the gauge does not fit squarely against the face plate, measure the space between the pin of the… Read More »

1. Remove carbon from the ring grooves. 2. Measure the clearance between the ring and the groove with a feeler gauge or depth gauge. 3. If the clearance exceeds the allowable limit, replace the ring since compression leak and oil shortage result. 4. If the clearance still exceeds the allowable limit after replacing the ring,… Read More »

1. Insert the piston ring into the lower part of the liner (the least worn out part) with the piston. 2. Measure the ring gap with a feeler gauge. 3. If the gap exceeds the allowable limit, replace the ring.