Main bearing hole, the size of the measurement
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Cheng hole can be measured using the inner diameter of the scale to check the benchmark size on the outside micrometer measurements, while also measuring the bearing hole roundness and cylindricity. Burned out bearings often bearing hole narrowing in the opening diameter and roundness tolerance is extremely unfavorable to the normal work of the bearing. If the positioning surface of the connecting rod bolt with Songkuang, connecting rod bearing caps will shift so that bearing roundness tolerance. Bearing bearing hole roundness error should be controlled within the dimensional tolerances, and the cylinder should be strictly controlled.
(2) measurement of main bearing size
① bearing thickness: the outside micrometer fixed probe by plane converted into a sphere, can be used to measure the bearing thickness. Bearing thickness should be controlled within the range of 0.005 to 0.010 mm, otherwise it would be the bearing inner diameter of ultra-poor. Bearing trace thinning near the opening, measurements should be noted.
② Bearing and bearing hole with tightness: with the tightness of the bearing of free bounce and I face a high degree of assurance. Measurement I height: installed according to regulations in combination with bearing, cross-bearing cap bolt and release one of the bolts to the specified torque measurements with a feeler bearing cover the gap of the interface, its value should be 0.05 to 0.15 mm scope.
③ bearing diameter: measurements will be required before the bearing required installation merge required torque tighten the bearing cap bolts tight, with the inner diameter of scale on the outside micrometer proofreading benchmark size measurement, the measurement to avoid the thinning area. Bearing bore diameter and the corresponding journal diameter size difference with the gap.
④ main bearing hole concentricity: main bearing bore concentricity error is mainly caused by the bearing hole concentricity error, while the bearing hole concentricity error causes the deformation of the cylinder. When the main journal radial circular bound within the specified tolerances, check the main journal and bearing food prints, each channel of the main bearing eat together imprint location apparent inconsistency, indicating that the concentricity error, may be scraping, boring bearing or replace the cylinder block, such as a solution, otherwise it is difficult to ensure that the engine work properly.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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(1) the measurement of the bearing holeCheng hole can be measured using the inner diameter of the scale to check the benchmark size on the outside micrometer measurements, while also measuring the bearing hole roundness and cylindricity. Burned out bearings often bearing hole narrowing in the opening diameter and roundness tolerance is extremely unfavorable to the normal work of the bearing. If the positioning surface of the connecting rod bolt with Songkuang, connecting rod bearing caps will shift so that bearing roundness tolerance. Bearing bearing hole roundness error should be controlled within the dimensional tolerances, and the cylinder should be strictly controlled.
(2) measurement of main bearing size
① bearing thickness: the outside micrometer fixed probe by plane converted into a sphere, can be used to measure the bearing thickness. Bearing thickness should be controlled within the range of 0.005 to 0.010 mm, otherwise it would be the bearing inner diameter of ultra-poor. Bearing trace thinning near the opening, measurements should be noted.
② Bearing and bearing hole with tightness: with the tightness of the bearing of free bounce and I face a high degree of assurance. Measurement I height: installed according to regulations in combination with bearing, cross-bearing cap bolt and release one of the bolts to the specified torque measurements with a feeler bearing cover the gap of the interface, its value should be 0.05 to 0.15 mm scope.
③ bearing diameter: measurements will be required before the bearing required installation merge required torque tighten the bearing cap bolts tight, with the inner diameter of scale on the outside micrometer proofreading benchmark size measurement, the measurement to avoid the thinning area. Bearing bore diameter and the corresponding journal diameter size difference with the gap.
④ main bearing hole concentricity: main bearing bore concentricity error is mainly caused by the bearing hole concentricity error, while the bearing hole concentricity error causes the deformation of the cylinder. When the main journal radial circular bound within the specified tolerances, check the main journal and bearing food prints, each channel of the main bearing eat together imprint location apparent inconsistency, indicating that the concentricity error, may be scraping, boring bearing or replace the cylinder block, such as a solution, otherwise it is difficult to ensure that the engine work properly.
