{"id":2339,"date":"2023-11-08T19:46:11","date_gmt":"2023-11-08T19:46:11","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2339"},"modified":"2023-11-08T19:46:11","modified_gmt":"2023-11-08T19:46:11","slug":"checking-replacing-and-tightening-conrod-bolts","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/08\/checking-replacing-and-tightening-conrod-bolts\/","title":{"rendered":"Checking, replacing and tightening conrod bolts"},"content":{"rendered":"

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03\u2014310 Checking, replacing and tightening conrod bolts<\/div>\n<\/div>\n<\/td>\n
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Conrod bolt <\/strong>sizes<\/div>\n<\/div>\n<\/td>\n
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Version<\/div>\n<\/div>\n<\/td>\n
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Part Number<\/div>\n<\/div>\n<\/td>\n
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Distanc a and b (fig., po a<\/div>\n<\/div>\n<\/td>\n
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e<\/div>\n
int 1) b<\/div>\n<\/div>\n<\/td>\n
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Thread dia. d<\/div>\n<\/div>\n<\/td>\n
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Expansion stem dia. c when new (fig., point 1)<\/div>\n<\/div>\n<\/td>\n
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Min. Expansion stem dia.<\/div>\n<\/div>\n<\/td>\n
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1st version<\/div>\n<\/div>\n<\/td>\n
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110 038 01 71<\/div>\n<\/div>\n<\/td>\n
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5.5<\/div>\n<\/div>\n<\/td>\n
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3<\/div>\n<\/div>\n<\/td>\n
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M 10×1<\/div>\n<\/div>\n<\/td>\n
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8.4-0.1<\/div>\n<\/div>\n<\/td>\n
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8.0<\/div>\n<\/div>\n<\/td>\n
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2nd version<\/div>\n<\/div>\n<\/td>\n
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110 038 03 71<\/div>\n<\/div>\n<\/td>\n
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4.5<\/div>\n<\/div>\n<\/td>\n
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3rd version<\/div>\n<\/div>\n<\/td>\n
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110 038 04 71<\/div>\n<\/div>\n<\/td>\n
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Conrod bolt installation pressure<\/div>\n<\/div>\n<\/td>\n
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45000 N<\/div>\n<\/div>\n<\/td>\n
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Conrod nut torque<\/strong><\/div>\n<\/div>\n<\/td>\n
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Initial torque<\/div>\n<\/div>\n<\/td>\n
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40-50<\/div>\n<\/div>\n<\/td>\n
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Torque angle<\/div>\n<\/div>\n<\/td>\n
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90-100\u00b0<\/div>\n<\/div>\n<\/td>\n
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Self-made tool<\/strong><\/div>\n<\/div>\n<\/td>\n
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Steel plate<\/div>\n<\/div>\n<\/td>\n
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see fig., point 3<\/div>\n<\/div>\n<\/td>\n
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Checking<\/div>\n<\/div>\n<\/td>\n
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1 Measure smallest expansion stem diameter before reusing.<\/div>\n<\/div>\n<\/td>\n
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03.2-310\/1 F3<\/div>\n<\/div>\n<\/td>\n
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Note: <\/strong>If the minimum expansion stem diameter reaches or is less than 8.0 <\/strong>mm, replace conrod bolt.<\/strong><\/div>\n
Only knock out a conrod bolt to replace it. Use third version conrod bolts for repairs.<\/div>\n<\/div>\n<\/td>\n
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Replacing<\/strong><\/div>\n<\/div>\n<\/td>\n
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2\u00a0 \u00a0Knock out conrod bolts.<\/div>\n
3\u00a0 \u00a0Press new bolts into conrod with a pressure of about 45000 N, or knock in with a hammer and mandrel.<\/div>\n
Place the connecting rod on a ground steel plate when knocking in or pressing in conrod bolts.<\/div>\n<\/div>\n<\/td>\n
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Distance between holes a = 64.6 mm Bore b = 11 mm<\/div>\n<\/div>\n<\/td>\n
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Tightening<\/strong><\/div>\n<\/div>\n<\/td>\n
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4<\/strong>\u00a0 \u00a0Lubricate nuts and threads.<\/div>\n
5\u00a0 \u00a0Tighten conrod nuts to a torque pressure of 40-50 <\/strong>Nm and a torque angle of 90-100\u00b0.<\/div>\n
Attention!<\/strong><\/div>\n
Tighten conrod bolts knocked in with a hammer to a torque pressure of 60\u201470 Nm and a torque angle of 90-100\u00b0 for the first time.<\/div>\n<\/div>\n<\/td>\n
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Make sure that this instruction is observed, since otherwise the nuts of the conrod bolts may <\/strong>become loose.<\/div>\n
Note: <\/strong>If no angle of rotation wrench is available, the connecting rod nuts can also be tightened by means of a normal socket wrench with toggle in one step <\/strong>by an angle of 90\u2014100\u00b0. Estimate angle as accurately as possible. To eliminate angle faults, do not use a torque <\/strong>wrench <\/strong>for tightening according to angles of rotation.<\/div>\n<\/div>\n<\/td>\n
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    03\u2014310 Checking, replacing and tightening conrod bolts   Conrod bolt sizes   Version Part Number Distanc a and b (fig., po a e int 1) b Thread dia. d Expansion stem dia. c when new (fig., point 1) Min. Expansion stem dia. 1st version 110 038 01 71 5.5 3 M 10×1 8.4-0.1 8.0 2nd version 110 038 03 71 4.5 3rd version 110 038 04 71 6.6   Conrod bolt installation pressure 45000 N   Conrod nut torque   Initial torque 40-50 Torque angle 90-100\u00b0 Self-made tool   Steel plate see fig., point 3   Checking 1 Measure smallest expansion stem diameter before reusing.   03.2-310\/1 F3         Note: If the minimum expansion stem diameter reaches or is less than 8.0 mm, replace conrod bolt. Only knock out a conrod bolt to replace it. Use third version conrod bolts for repairs.   Replacing 2\u00a0 \u00a0Knock out conrod bolts. 3\u00a0 \u00a0Press new bolts into conrod with a pressure of about 45000 N, or knock in with a hammer and mandrel. Place the connecting rod on a ground steel plate when knocking in or pressing in conrod bolts. Distance between holes a = 64.6 mm Bore b = 11 mm   Tightening   4\u00a0 \u00a0Lubricate nuts and threads. 5\u00a0 \u00a0Tighten conrod nuts to a torque pressure of 40-50 Nm and a torque angle of 90-100\u00b0. Attention! Tighten conrod bolts knocked in with a hammer to a torque pressure of 60\u201470 Nm and a torque angle of 90-100\u00b0 for the first time.   03.2-310\/2 F3       Make sure that this instruction is observed, since otherwise the nuts of the conrod bolts may become loose. Note: If no angle of rotation wrench is available, the connecting rod nuts can also be tightened by means of a normal socket wrench with toggle in one step by an angle of 90\u2014100\u00b0. Estimate angle as accurately as possible. To eliminate angle faults, do not use a torque wrench for tightening according to angles of rotation.   03.2-310\/3 F3        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,27],"tags":[],"class_list":["post-2339","post","type-post","status-publish","format-standard","hentry","category-crankshaft-assembly","category-m110"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t