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Installation and check of backlashes in connecting rod bearing

Description applies only to connecting rod bearings standard size. Repair connecting rod bearings to size groups are not divided.

New connecting rod bearings are matched by size group codes applied to the crankshaft.

Codes size groups are applied to the 1st or 4th crankshaft cheeks.

To pick up a connecting rod bearing shells need to know the dimension group of the crank pin of the crankshaft to the cylinder, and then the attached table to determine the correct insert oriented color coded, which is applied as a dot on the side surface of the insert.

Checking the connecting rod bearing clearance

PERFORMANCE ORDER

1. Clean the outer surface of the rod and the surface of the bore liners under inserts rods and covers of rods. 2. Replace the pads and make sure that the tabs on the bearing shell entered the sample in a rod (arrow) and the connecting rod cap. 3. When installing the inserts do not touch the work surface. Make sure the oil hole in the upper connecting rod bearings exactly aligned with the holes in the connecting rod. 4. If the check clearance will be carried out with the old pads, then insert the inserts into place. 5. The connecting rod bearing clearance can be checked in two ways. 6. When determining the gap first method collect cover with rods and connecting rod bearings, having tracked correctness of the relative orientation of these parts. 7. Tighten the nuts with the set moment caps and measure the inner diameter of each collected a pair of inserts. Clearance is defined as the difference between the inside diameter of the connecting rod bearing and the diameter of the crankpin. 8. The second method (more accurate) is to apply the plastic gauge wire. 9. Install the connecting rod bearings, correct their orientation. Each crank pin crankshaft lay on the gauge of the wire segment. 10. Clean the surface of the connecting rod bearings and connecting rods are set to the corresponding crankshaft journals. Install the connecting rod bearing caps, orient them on existing tags, or labels put at dismantling. 11. Tighten caps. When tightening the change in the position of the wire is not allowed, and not allowed rotation of the crankshaft. 12. Remove the covers of rods, while preventing rotation of the crankshaft or displacement gauge wire. Compare the width of the flattened wire to a scale on packing and define backlash in radical bearings. 13. If the backlash differs from standard, the reason can be the wrong choice rod bushings (or increased wear if verified inserts were in operation). 14. Before coming to a conclusion about the need to replace the inserts, make sure that the surfaces between the covers or connecting rods and the liner when measuring no dirt or oil. 15. If the width of a flattened wire with one end larger, it indicates a taper pin portion. 16. If the backlash differs from the norm when measuring with the old pads, then repeat the measurement with new inserts. 17. If, however, and with new inserts a gap higher than normal, you should consult Customer service centers. You may need regrinding crankshaft crankpins repair and replacement liners. 18. If necessary, purchase inserts corresponding size group and repeat the measurement gap in the connecting rod bearings. 19. At the end carefully remove remaining wire.

Installing the connecting rod and piston group

Further description is conducted on the assumption that the crankshaft is installed.

PERFORMANCE ORDER

1. Make sure to install the connecting rod bearing. 2. If new bearings are installed, then wash them with kerosene. 3. Wipe clean the connecting rods and bearings. 4. Lubricate the cylinders, pistons and rings, then put the pistons in gathering with rods in the order in which these items will be installed on the engine. 5. The assembly start with 1st cylinder. Ensure proper alignment of joints of piston rings (see Fig. Subsection 3.1.2.13) and squeeze the ring a special device. 6. Insert the piston and connecting rod assembly into the first cylinder. Align the piston so that the mark on the bottom of the piston (in the form of arrows or lines) facing toward the front of the lid. Lightly tap the piston hammer handle or a piece of wood that went into the cylinder piston and the piston head is brought to a demountable plane of the block of cylinders. 7. Make sure that the connecting rod bearings are installed properly and liberally lubricate the inserts and the crank pin of the crankshaft. 8. Careful not to damage the surface of the cylinder, tighten the connecting rod to the crankshaft journal. 9. Put the cap rod to insert and tighten the nuts by hand. Note that the plane on the connecting rod cover on a connecting rod, which is marked, should be aligned (this means that the connecting rod bearing mounting projections are opposed to each other). 10. Tighten the connecting rod caps with the moment of the 1st stage tightening torque with a torque wrench and the end of the head. Then tighten the nuts on the corner of 2nd stage of tightening or tighten with the moment of the 2nd stage. 11. Check up freedom of rotation of the crankshaft. If new parts are installed, it must feel a marked resistance to rotation of the crankshaft constant, but the crankshaft must rotate smoothly, without jamming. 12. Similarly establish other pistons and connecting rods. 13. Install the cylinder head, camshaft chain and the oil pan.