{"id":3028,"date":"2023-11-19T13:00:24","date_gmt":"2023-11-19T12:00:24","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=3028"},"modified":"2023-11-19T13:00:24","modified_gmt":"2023-11-19T12:00:24","slug":"reconditioning-of-coolant-pump","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/19\/reconditioning-of-coolant-pump\/","title":{"rendered":"Reconditioning of coolant pump"},"content":{"rendered":"

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20\u2014220 Reconditioning of coolant pump<\/strong><\/div>\n<\/div>\n<\/td>\n
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Self-made tools<\/strong><\/div>\n<\/div>\n<\/td>\n
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Spacing plate b = 2 mm<\/div>\n<\/div>\n<\/td>\n
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Pressing-in sleeve<\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 Fan hub<\/div>\n
2\u00a0 \u00a0Coolant pump shaft with compact bearing<\/div>\n
3\u00a0 \u00a0Bearing housing<\/div>\n
5\u00a0 \u00a0Slide ring seal<\/div>\n
6\u00a0 \u00a0Counterring<\/div>\n<\/div>\n<\/td>\n
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7\u00a0 \u00a0O-ring<\/div>\n
8\u00a0 \u00a0Impeller<\/div>\n
a\u00a0 \u00a0 22.8\u201423.2 mm<\/div>\n
b\u00a0 \u00a02 mm<\/div>\n
c\u00a0 \u00a0 Vent holes<\/div>\n<\/div>\n<\/td>\n
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Disassembly<\/strong><\/div>\n<\/div>\n<\/td>\n
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1<\/strong>\u00a0 \u00a0 Support bearing housing with pertinent tubing and press out coolant pump shaft by means of a mandrel.<\/div>\n
2\u00a0 \u00a0 Knock sliding ring seal out of bearing housing.<\/div>\n<\/div>\n<\/td>\n
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20.8-220\/1 F 2<\/div>\n<\/div>\n<\/td>\n
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3 Remove counterring from impeller.<\/div>\n
Note: <\/strong>Always replace compact bearing and fan hub following disassembly.<\/div>\n<\/div>\n<\/td>\n
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Assembly<\/strong><\/div>\n<\/div>\n<\/td>\n
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4 Press in new compact bearing flush with bearing housing by means of a tube positioned against outer race.<\/div>\n
Do not press against coolant pump shaft.<\/strong><\/div>\n<\/div>\n<\/td>\n
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5 Coat mounting bore of sliding ring seal in bearing housing slightly with sealing compound (part No. 001 989 25 20).<\/div>\n
Press-in or knock-in sliding ring seal with pressing-in sleeve.<\/div>\n
Attention!<\/strong><\/div>\n
Support only against bearing housing and not against coolant pump shaft.<\/div>\n<\/div>\n<\/td>\n
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6 Coat O-ring on counterring with brake cylinder paste and push with chamfered side (arrow) into thoroughly cleaned impeller.<\/div>\n<\/div>\n<\/td>\n
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120 -10863<\/strong><\/div>\n<\/div>\n<\/td>\n
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20.8-220\/2 F 2<\/div>\n<\/div>\n<\/td>\n
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7\u00a0 \u00a0Clean sealing surfaces of counterring and sliding ring seal free of dust by means of a chamois cloth.<\/div>\n
8\u00a0 \u00a0Degrease both shaft stubs and impeller in bore.<\/div>\n
9\u00a0 \u00a0Press-on impeller flush with shaft while support\u00ading coolant pump shaft.<\/div>\n<\/div>\n<\/td>\n
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10 Heat fan hub on a hot plate to approx. 300 \u00b0C (annealing color dark \u2014 up to light blue).<\/div>\n
Place heated fan hub on a recessed base. Hold spacing plate on coolant pump shaft, slip coolant pump shaft on fan hub and apply a blast of compressed air against hub. Wait for a few seconds until fan hub is firm and then cool immediately in water bath.<\/div>\n<\/div>\n<\/td>\n
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20.8-220\/3 F 2<\/div>\n<\/div>\n<\/td>\n
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    20\u2014220 Reconditioning of coolant pump   Self-made tools   Spacing plate b = 2 mm Pressing-in sleeve   1\u00a0 \u00a0 Fan hub 2\u00a0 \u00a0Coolant pump shaft with compact bearing 3\u00a0 \u00a0Bearing housing 5\u00a0 \u00a0Slide ring seal 6\u00a0 \u00a0Counterring 7\u00a0 \u00a0O-ring 8\u00a0 \u00a0Impeller a\u00a0 \u00a0 22.8\u201423.2 mm b\u00a0 \u00a02 mm c\u00a0 \u00a0 Vent holes   Disassembly 1\u00a0 \u00a0 Support bearing housing with pertinent tubing and press out coolant pump shaft by means of a mandrel. 2\u00a0 \u00a0 Knock sliding ring seal out of bearing housing.   20.8-220\/1 F 2       3 Remove counterring from impeller. Note: Always replace compact bearing and fan hub following disassembly.   Assembly 4 Press in new compact bearing flush with bearing housing by means of a tube positioned against outer race. Do not press against coolant pump shaft.   5 Coat mounting bore of sliding ring seal in bearing housing slightly with sealing compound (part No. 001 989 25 20). Press-in or knock-in sliding ring seal with pressing-in sleeve. Attention! Support only against bearing housing and not against coolant pump shaft.   6 Coat O-ring on counterring with brake cylinder paste and push with chamfered side (arrow) into thoroughly cleaned impeller. 120 -10863   20.8-220\/2 F 2       7\u00a0 \u00a0Clean sealing surfaces of counterring and sliding ring seal free of dust by means of a chamois cloth. 8\u00a0 \u00a0Degrease both shaft stubs and impeller in bore. 9\u00a0 \u00a0Press-on impeller flush with shaft while support\u00ading coolant pump shaft.   10 Heat fan hub on a hot plate to approx. 300 \u00b0C (annealing color dark \u2014 up to light blue). Place heated fan hub on a recessed base. Hold spacing plate on coolant pump shaft, slip coolant pump shaft on fan hub and apply a blast of compressed air against hub. Wait for a few seconds until fan hub is firm and then cool immediately in water bath.   20.8-220\/3 F 2        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55,44],"tags":[],"class_list":["post-3028","post","type-post","status-publish","format-standard","hentry","category-engine-cooling-om617","category-om617"],"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