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REPAIR valve gear. Removal and installation of valves

Removing the valve is made after the head cylinder is removed from the engine. Disassembly operations head cylinders is carried out in the following sequence: - Tighten the cylinder head in a vise; - Loosen the screws holding the flange thrust distribution shaft and remove the flange; - Raskontrite rocker adjusting screws and remove them so that the spherical ends were recessed into the threaded holes and remove the valve stem tip; - With the rocker arm shaft mandrel knock out holes in the the cylinder head and rocker anime, springs and axles spacers (see "Disassembly axes rocker arms"); - Remove the fuel pump drive shaft and a distribution shaft bearings in the cylinder head; - On the plate of each valve mark the serial number each cylinder; - With a special puller (Fig. 31) compress the spring valve to be disassembled. To do this, a bracket puller set with respect to the head, so that ring emphasis was on top of two plates of the spring valve. When you turn the lever 5 from the position I in the position II kulachek clicks on the bar 4, which moves a bracket and thereby squeezes the two valve springs. When the spring compressed, remove the crumbs from the valve stem. Weakening the pressure on the lever puller, release the valve spring. Next, remove the puller and remove the spring, valve plate and valve protective cover and then remove Valve guide bushing. Similarly, remove the and all other valves. Install valves in reverse order, at the same time check the condition and the wear bars valves and guides, valve job facets, seat and valve springs. Each time the cylinder head assembly with the valves after repair or after grinding valves, Dish washers valve springs required replace with new ones, regardless of the state. This change is necessary in order to avoid possible leakage oil through the washers, as from time to time material washers hardens and loses its elasticity, necessary to create a seal. When repair parts the valve mechanism must be borne in mind that the valves Spare parts are available only to the nominal size. Therefore, in the past worn valve stem to replace the new ones. Repairing the valve stem through pereshlifovaniya on the smaller size is impractical because it requires replacement guides in the head and use croutons oversize. When installing the valve rods are required Grease graphite grease.
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