Methods for replacing valve conduits of diesel generators
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Diesel generator out of the old catheter to replace the catheter, use the ball for large, the end of the ball is mounted in the catheter, press out with a press bed, or hammer out the old catheter, cleaning the catheter and hole, press into the new catheter. A coat of oil should be applied to the outer wall of the conduit with the cone facing up (one end of the valve head) before pressing in. Place it squarely on the hole of the conduit seat and press down on the man or blunderer. When jacking out the old pipe or pressing the pipe, do not make the punch swing to avoid damaging the pipe.
After pressing in, the distance between the upper end of the catheter and the cylinder block (cover) plane should be measured, generally 22-24.5mm. The simple way is to be consistent with the distance between the upper end of the catheter and the cylinder block (cover) plane before removal, therefore, attention should be paid to this point when removing the old catheter. If the inverted valve is used, the distance from the valve foot end of the catheter to the cylinder head plane can also be measured, because the depth of the valve catheter is too deep or too shallow. Mounting too deep will increase intake and exhaust resistance, and the valve spring or lock clip will easily hit the lower end of the conduit when the valve is raised.
When running, it is often easy to send out a tapping sound similar to the valve clearance is too large. Serious often leads to early damage of parts. Too shallow installation will affect the valve and conduit cooling effect. Too deep or too shallow will make the valve to the lowest position, resulting in valve leakage. After replacing the conduit, if the clearance between the conduit and valve rod is too small, the valve conduit reamer can be used to hinged the inner hole of the conduit.
When hinged, should choose and adjust the dumpling knife according to the diameter of the valve rod, the amount of the knife can not be too large, the reamer should be kept flat, the edge of the hinged edge test match, until it reaches the appropriate clearance. In the absence of a valve reamer, fine valve sand can also be applied to the valve rod and the tube inserted for grinding until the requirements are met.