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Installation and check of backlashes in radical bearings

Description only applies to the standard size main bearings. Repair loose leaves into size groups are not divided.

On the crankshaft codes marked on the cheek neck of 1st cylinder (from the cover of a chain). A five-digit code refers to the diameter of the main bearing, - the first number is the code for the 1st main journal of the crankshaft, and the fifth - the code for the 5th cervical.

In some engines on the cheek of the crankshaft also marked the four-digit code that indicates the dimension of the connecting rod bearing group (see. Subsection 3.2.2.10.2).

In the cylinder block dimensional codes are stamped in the bottom of the flywheel side.

PERFORMANCE ORDER

1. Clean the outer surface of new radical loose leaves, under the surface of the bore liners in the cylinder block and main bearing caps. 2. Install the upper bearings, aligning the tabs with the grooves in the cylinder block (arrow). 3. Set the lower lid liners, also aligning the protrusion with the recess (arrow). 4. Do not touch the working surface of the finger pads. Keep in mind that all upper molars inserts provided oil groove and a hole for the oil supply. Lower liners solid. If the clearance is checked on the old liners, then make sure that they were installed on the former places. 5. The gap can be checked in two ways. 6. When determining the gap by the first method, set the cover (or frame covers) radical bearings with loose leaves on the engine block, tighten the bolts to the specified torque, and measure the inner diameter of each collected a pair of inserts. Backlash in radical bearings is defined as the difference between the diameter and the diameter of the main journals of the crankshaft. 7. The second method (more accurate) is to apply the plastic gauge wire. 8. Replace the radical loose leaves, gently place the crankshaft. Radical neck must be clean and dry. 9. Prepare several pieces of plastic gauge wire Plastigage, the length of which is slightly smaller width of the main bearings, and put on one segment on each radical neck parallel to the axis of the crankshaft. 10. Replace the cover on the lower inserts without disturbing their orientation. 11. Tighten bolts with the set moment in the specified sequence. Tighten the bolts with the same, ever-increasing effort. During the tightening position of the segment of wire must not be changed, the rotation of the crankshaft is not allowed. 12. In a sequence of return specified unscrew bolts of covers, turning at one revolution per reception. 13. Remove the cover (or frame), without prejudice to the flattened wires and preventing rotation of the crankshaft. 14. Compare width of the crushed wire with a scale on packing and define backlash in the main bearing. Compare with the standard value. 15. If the backlash differs from standard, the reason can be the wrong selection of loose leaves (or increased wear if verified inserts were in operation). 16. Before coming to a conclusion about the need to replace the inserts, make sure that between the caps and cylinder block and insert in the measurement no dirt or oil. 17. If the width of a flattened wire with one end larger, it indicates a taper neck. 18. If the backlash differs from the norm when measuring with the old pads, then repeat the measurement with new inserts. 19. If, however, and with new inserts a gap higher than normal, you should consult Customer service centers. You may need to reground crankshaft journals and replace liners repair. 20. If necessary, purchase inserts corresponding size group and repeat the measurement gap in radical bearings. 21. After scrape remnants gauge wire with the crankshaft main journals, without damaging the surface.

PERFORMANCE ORDER

1. Carefully remove the crankshaft of the engine block. 2. Install main bearing shells on the ground. 3. If new liners, then rinse thoroughly in kerosene. 4. Wipe dry liners and connecting rods. 5. Liberally lubricate the engine with fresh oil to the surface of the liner installed in the engine block. 6. Apply a thin layer of grease persistent half rings and attach them on both sides of the third main bearing. 7. Note that the lubricating groove on both half-rings have been turned away from the cylinder. 8. Set the crankshaft in the cylinder block and check the axial clearance. 9. Thoroughly clean the grease from the plane split main bearing caps and cylinder block. 10. Apply fresh oil to the surface of the engine lower liners. Make sure that the mounting tabs on the inserts go into the recesses in the covers. 11. Replace the lid on the old place, focusing on the labeling. 12. Tighten the bolts by hand. 13. Tighten bolts of covers in the sequence given to about half the time. Then, repeating the procedure, tighten the bolts to the specified torque. 14. Check up freedom of rotation of the crankshaft. 15. Install connecting rods with pistons. 16. Apply a label indicating the depth of planting oil seal in the holder and remove the oil seal by prying with a screwdriver. 17. Press in the new oil seal with light blows of a hammer, a depth that corresponds to the labeling. 18. Put on a split surface of the gland sealant strip and replace the cylinder block. 19. Tighten bolts with the set moment. 20. Establish a flywheel, chain drive camshafts and oil pan.