2 oil - and check valve

2.1 Identification of experience
(1) with the naked eye observation
A. When filling cone valve seal the seal ring with subsidence, and contact width greater than 1 mm, it is not appropriate to continue to use.
B. When the decompression zone in the surface all traces of vertical groove wear, do not see the roughness of the original, should be repaired or replaced.
C. When filling holes with valve and the valve seat surface corrosion, cracks and peeling metal to be replaced.
(2) Engine checks
Removed from the high-pressure injection pump, tubing, decompression to put Crankshaft, when the flywheel on only transferred to the compression point, if the high-pressure injection pump tubing connectors are diesel outflow, the filling valve has been wear and tear, can no longer use, otherwise still continue to be used.
(3) filling valve hole out from the valve seat (not all out), with a thumbs block valve seat under the oil hole, and then gently pressing filling valve, where the pressure, if the filling valve to on the shift itself, be deemed a good seal.
(4) slightly loosened the valve seat upper high-pressure oil pipeline connector nut, decompression to put Crankshaft, if the outward spray of diesel, has demonstrated technology of the oil valve dual normal, if only out of diesel bubble, the filling Valve not sealed.