{"id":2762,"date":"2023-11-14T22:44:02","date_gmt":"2023-11-14T21:44:02","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2762"},"modified":"2023-11-14T22:44:02","modified_gmt":"2023-11-14T21:44:02","slug":"functional-description-positive-and-negative-venting-of-fuel-tank","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/14\/functional-description-positive-and-negative-venting-of-fuel-tank\/","title":{"rendered":"Functional description positive and negative venting of fuel tank"},"content":{"rendered":"

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47\u2014720 Functional description positive and negative venting of fuel tank<\/strong><\/div>\n<\/div>\n<\/td>\n
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On model 107.04 and 123.09 an expansion tank is located outside fuel tank.<\/div>\n
Model 107.02 is provided with an expansion tank which is installed in fuel tank and can therefore not be removed.<\/div>\n<\/div>\n<\/td>\n
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Model 107.04<\/div>\n
1\u00a0 \u00a0Expansion tank<\/div>\n
2\u00a0 \u00a0Fuel hoses<\/div>\n
3\u00a0 \u00a0Fuel tank Large arrow = Vent line<\/div>\n<\/div>\n<\/td>\n
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The fuel vapors escape from fuel tank into expansion tank and from there through vent line into atmosphere.<\/div>\n<\/div>\n<\/td>\n
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Model 123.09<\/div>\n
55 Expansion tank<\/div>\n
Arrows = Connecting lines to fuel tank<\/div>\n
and vent line<\/div>\n<\/div>\n<\/td>\n
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47.2 lib\u2014720\/1 F 2<\/div>\n<\/div>\n<\/td>\n
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Models 116, 123 and 126 are provided with a vent system comprising a collecting tray and a pipe system.<\/div>\n<\/div>\n<\/td>\n
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3\u00a0 \u00a0Collecting tray<\/div>\n
4\u00a0 \u00a0Vent line<\/div>\n
5\u00a0 \u00a0Pipe system<\/div>\n<\/div>\n<\/td>\n
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Since April 1980 additional check vessels are attached to ends of pipe system of model 126.<\/div>\n
The following national version vehicles are also provided with check vessels:<\/div>\n
^-v 1979 entering production model 123<\/div>\n<\/div>\n<\/td>\n
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1980 model 116<\/div>\n<\/div>\n<\/td>\n
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1980\/81, model 123<\/div>\n<\/div>\n<\/td>\n
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9 Check vessels<\/div>\n<\/div>\n<\/td>\n
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The fuel vapors escape through vent system to vent line and from there into atmosphere.<\/div>\n
A protective sleeve (arrow) is plugged on at end of vent line on models 107.04, 126 and on all vehicles manufactured up to February 1979.<\/div>\n<\/div>\n<\/td>\n
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Model 126<\/div>\n
Arrow = Protective sleeve<\/div>\n<\/div>\n<\/td>\n
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Starting March 1979 all vehicles (except model 107.04 and 126) are provided with a vent sleeve at end of vent line.<\/div>\n<\/div>\n<\/td>\n
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64 Vent line 73 Vent sleeve<\/div>\n<\/div>\n<\/td>\n
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47.2 llb-720\/2 F2<\/div>\n<\/div>\n<\/td>\n
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When repairing older vehicles, also install only vent sleeve with diaphragm. In such a case, the vent line must be rebent with a suitable mandrel in such a manner that the vent sleeve is pointing downwards.<\/div>\n
Attention!<\/strong><\/div>\n
Avoid kinks in vent line when rebending.<\/div>\n<\/div>\n<\/td>\n
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Vent sleeve with diaphragm<\/div>\n<\/div>\n<\/td>\n
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47.2 llb-720\/3 F2<\/div>\n<\/div>\n<\/td>\n
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47\u2014720 Functional description of fuel tank positive and negative venting system (model 114)<\/div>\n<\/div>\n<\/td>\n
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>up to January 1973 )up to end of series<\/div>\n<\/div>\n<\/td>\n
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An expansion tank (1) in trunk serves for positive and negative venting of fuel tank.<\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 Expansion tank<\/div>\n
2\u00a0 \u00a0 Positive venting line to fuel tank<\/div>\n
3\u00a0 \u00a0 Negative venting line to atmosphere<\/div>\n
4\u00a0 \u00a0 Connecting hoses<\/div>\n<\/div>\n<\/td>\n
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The expansion tank is connected to two positive venting lines (arrows) entering the fuel tank and with one negative venting line (3) to atmosphere.<\/div>\n<\/div>\n<\/td>\n
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Arrows = positive venting lines on fuel tank<\/div>\n<\/div>\n<\/td>\n
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If with the fuel tank filled, fuel is forced into positive venting line (2), the fuel can rise up to expansion tank. As soon as one of the two positive venting lines is free of fuel, the fuel will immediately flow back into fuel tank, while the fuel vapors escape into the open air through negative venting line (3).<\/div>\n
The fuel vapors escape into the atmosphere at point shown in illustration (arrow).<\/div>\n<\/div>\n<\/td>\n
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Arrow = outlet of fuel vapors into the atmosphere<\/div>\n<\/div>\n<\/td>\n
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47.2 Ib\u2014720\/1<\/div>\n<\/div>\n<\/td>\n
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Model 114 Fuel system, fuel tank positive and negative venting<\/div>\n<\/div>\n<\/td>\n
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\"m110<\/p>\n

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1472-7652<\/strong><\/div>\n<\/div>\n
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\u00a910<\/div>\n<\/div>\n<\/td>\n
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1<\/div>\n<\/div>\n<\/td>\n
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Nut<\/div>\n<\/div>\n<\/td>\n
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8,9<\/div>\n<\/div>\n<\/td>\n
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Reinforcing panel<\/div>\n<\/div>\n<\/td>\n
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2<\/div>\n<\/div>\n<\/td>\n
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Spring washer<\/div>\n<\/div>\n<\/td>\n
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Hex. nut<\/div>\n<\/div>\n<\/td>\n
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Immersion tube transmitter<\/div>\n<\/div>\n<\/td>\n
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Sealing ring<\/div>\n<\/div>\n<\/td>\n
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Gasket<\/div>\n<\/div>\n<\/td>\n
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15<\/div>\n<\/div>\n<\/td>\n
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Fuel drain plug with filter<\/div>\n<\/div>\n<\/td>\n
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5<\/div>\n<\/div>\n<\/td>\n
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Fuel tank<\/div>\n<\/div>\n<\/td>\n
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Fuel expansion tank<\/div>\n<\/div>\n<\/td>\n
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Filler lock<\/div>\n<\/div>\n<\/td>\n
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46<\/div>\n<\/div>\n<\/td>\n
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Fuel hose<\/div>\n<\/div>\n<\/td>\n
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7<\/div>\n<\/div>\n<\/td>\n
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Gasket<\/div>\n<\/div>\n<\/td>\n
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47<\/div>\n<\/div>\n<\/td>\n
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Rubber sleeve<\/div>\n<\/div>\n<\/td>\n
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47.2 lb-720\/2<\/div>\n<\/div>\n<\/td>\n
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 <\/p>\n","protected":false},"excerpt":{"rendered":"

    47\u2014720 Functional description positive and negative venting of fuel tank   On model 107.04 and 123.09 an expansion tank is located outside fuel tank. Model 107.02 is provided with an expansion tank which is installed in fuel tank and can therefore not be removed.   Model 107.04 1\u00a0 \u00a0Expansion tank 2\u00a0 \u00a0Fuel hoses 3\u00a0 \u00a0Fuel tank Large arrow = Vent line   The fuel vapors escape from fuel tank into expansion tank and from there through vent line into atmosphere. Model 123.09 55 Expansion tank Arrows = Connecting lines to fuel tank and vent line   47.2 lib\u2014720\/1 F 2       Models 116, 123 and 126 are provided with a vent system comprising a collecting tray and a pipe system.   3\u00a0 \u00a0Collecting tray 4\u00a0 \u00a0Vent line 5\u00a0 \u00a0Pipe system   Since April 1980 additional check vessels are attached to ends of pipe system of model 126. The following national version vehicles are also provided with check vessels: ^-v 1979 entering production model 123 1980 model 116 1980\/81, model 123 9 Check vessels   The fuel vapors escape through vent system to vent line and from there into atmosphere. A protective sleeve (arrow) is plugged on at end of vent line on models 107.04, 126 and on all vehicles manufactured up to February 1979. Model 126 Arrow = Protective sleeve   Starting March 1979 all vehicles (except model 107.04 and 126) are provided with a vent sleeve at end of vent line. 64 Vent line 73 Vent sleeve   47.2 llb-720\/2 F2       When repairing older vehicles, also install only vent sleeve with diaphragm. In such a case, the vent line must be rebent with a suitable mandrel in such a manner that the vent sleeve is pointing downwards. Attention! Avoid kinks in vent line when rebending.   Vent sleeve with diaphragm   47.2 llb-720\/3 F2       47\u2014720 Functional description of fuel tank positive and negative venting system (model 114)   >up to January 1973 )up to end of series   An expansion tank (1) in trunk serves for positive and negative venting of fuel tank. 1\u00a0 \u00a0 Expansion tank 2\u00a0 \u00a0 Positive venting line to fuel tank 3\u00a0 \u00a0 Negative venting line to atmosphere 4\u00a0 \u00a0 Connecting hoses   The expansion tank is connected to two positive venting lines (arrows) entering the fuel tank and with one negative venting line (3) to atmosphere. Arrows = positive venting lines on fuel tank   If with the fuel tank filled, fuel is forced into positive venting line (2), the fuel can rise up to expansion tank. As soon as one of the two positive venting lines is free of fuel, the fuel will immediately flow back into fuel tank, while the fuel vapors escape into the open air through negative venting line (3). The fuel vapors escape into the atmosphere at point shown in illustration (arrow). Arrow = outlet of fuel vapors into the atmosphere   47.2 Ib\u2014720\/1       Model 114 Fuel system, fuel tank positive and negative venting   1472-7652 15 \u00a910   1 Nut 8,9 Reinforcing panel 2 Spring washer 10 Hex. nut 3 Immersion tube transmitter 14 Sealing ring 4 Gasket 15 Fuel drain plug with filter 5 Fuel tank 45 Fuel expansion tank 6 Filler lock 46 Fuel hose 7 Gasket 47 Rubber sleeve   47.2 lb-720\/2        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[27,43],"tags":[],"class_list":["post-2762","post","type-post","status-publish","format-standard","hentry","category-m110","category-m110-fuel-system"],"aioseo_notices":[],"featured_image_src":null,"author_info":{"display_name":"mackuz","author_link":"https:\/\/mbci.mackuz.ovh\/index.php\/author\/mackuz\/"},"_links":{"self":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=2762"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2762\/revisions"}],"predecessor-version":[{"id":2763,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2762\/revisions\/2763"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}