{"id":2901,"date":"2023-11-17T23:38:06","date_gmt":"2023-11-17T22:38:06","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2901"},"modified":"2023-11-17T23:38:06","modified_gmt":"2023-11-17T22:38:06","slug":"operation-engine-transmission-overload-protection","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/17\/operation-engine-transmission-overload-protection\/","title":{"rendered":"Operation engine-transmission-overload protection"},"content":{"rendered":"

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1\u2014015 Operation engine-transmission-overload protection<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Engine-transmission overload protection<\/strong><\/div>\n
To prevent damage to engine and transmission in the event of faulty operation or during extreme situations the engine-transmission overload protection performs 3 functions:<\/div>\n
1.\u00a0 Engine overload protection.<\/div>\n
2.\u00a0 Transmission overload protection.<\/div>\n
3.\u00a0 Shifting-down automatic transmission into 1st gear when moving off.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Circuit diagram engine-, transmission-overload switch \u2014 Model 116.120<\/div>\n<\/div>\n<\/td>\n
\n
\n
model year 1978\u20141980<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
1\u00a0 \u00a0 Switching unit over\u00adload protection<\/div>\n
2\u00a0 \u00a0 Changeover valve<\/div>\n
3\u00a0 \u00a0 Pressure switch boost air pipe<\/div>\n
4\u00a0 \u00a0 Pressure switch transmission<\/div>\n<\/div>\n<\/td>\n
\n
\n
5\u00a0 \u00a0 Solenoid valve automatic transmission<\/div>\n
6\u00a0 \u00a0 Stop lamp switch<\/div>\n
7\u00a0 \u00a0 Kickdown switch<\/div>\n<\/div>\n<\/td>\n
\n
\n
a To fuse no. 4 b To revolution<\/div>\n
counter c To clutch starter<\/div>\n
lockout switch d To stop lamps<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1.8-015\/1<\/div>\n<\/div>\n<\/td>\n
\n
\n
F 3<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Circuit diagram engine-transmission overload switch \u2014 Model 123.193 standard version<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
1\u00a0 \u00a0 Switching unit over\u00adload protection<\/div>\n
2\u00a0 \u00a0 Changeover valve<\/div>\n
3\u00a0 \u00a0 Pressure switch boost air pipe<\/div>\n
4\u00a0 \u00a0 Pressure switch transmission<\/div>\n<\/div>\n<\/td>\n
\n
\n
5\u00a0 \u00a0 Solenoid valve automatic transmission<\/div>\n
6\u00a0 \u00a0 Stop lamp switch<\/div>\n
7\u00a0 \u00a0 Kickdown switch<\/div>\n<\/div>\n<\/td>\n
\n
\n
a To fuse no. 4 b To revolution<\/div>\n
counter c To clutch starter<\/div>\n
lockout switch d To stop lamp<\/div>\n
switch<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1.8-015\/2 F3<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Engine overload protection<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Model 123.193 Model 126.120<\/div>\n<\/div>\n<\/td>\n
\n
\n
starting model year 1981<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Starting model year 1981, installation of transmission 722.303 instead of 722.120 has made the transmission overload protection unnecessary. Only an engine over\u00adload protection will be installed.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Circuit diagram engine overload protection<\/div>\n
2\u00a0 \u00a0 Changeover valve boost air pipe<\/div>\n
3\u00a0 \u00a0 Pressure switch boost air pipe a To fuse no. 10 (terminal 15)<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1.8-015\/3 F3<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Engine overload protection<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The boost air pipe is provided with a pressure switch (3) At a boost pressure above 1.1 \u00b1 0,15 bar gauge pres\u00adsure, the pressure switch will close and will connect mi\u00adnus (negative) to changeover valve (2), which is connect\u00aded to plus (positive) via terminal 15. The changeover valve interrupts the connection boost air pipe to ALDA aneroid capsule on injection pump. The aneroid capsule is connected to atmosphere and the injection fuel quantity is thereby reduced. If the pressure drops to below 1.1 \u00b1 0.15 bar gauge pressure, the pressure switch will again interrupt the minus (negative) connection and will connect the ALDA aneroid cap\u00adsule again to boost air pipe.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Model 116<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
1\u00a0 \u00a0 \u00a0Pressure line of boost air pipe<\/div>\n
2\u00a0 \u00a0 Changeover valve<\/div>\n
3\u00a0 \u00a0 Pressure line to ALDA capsule<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Model 123<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Model 126<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1.8-015\/4 F2<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Transmission overload protection<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
If <\/strong>the pressure switch (4) is subject to a pressure below 0.3 bar gauge pressure (driving speed below approx. 8 km\/h) and if the engine speed rises to above approx. 2000\/min, e.g.when moving off on a high gradient with a fully loaded vehicle, the transmission may become overloaded by the high torque. A reduc\u00adtion of the injected fuell quantity on injection pump will prevent an engine speed increase obove approx. 2000\/min.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The rpm switch in switching unit activates the change\u00adover valve with minus (negative). Since terminal 15 provides a connection to plus (positive), the valve will switch and will provide the pressure line to ALDA capsule on injection pump with ambient pressure. This will reduce the injected fuel quantity, the engine speed will drop below 2000\/min (by approx. 100\/mtn). If engine speed drops below approx. 2000\/min, the rpm switch in switching unit (1) will interrupt the minus (negative) connection at changeover valve. The valve opens the connection to boost air pipe and will close the connection of pressure line to the atmosphere. The reduction of the injected fuel quantity is cancelled and the engine speed will increase again. This regula\u00adting cycle will be repeated until the pressure at switch (4) has attained 0.3 bar gauge pressure. The pressure switch will then close and the overload protection is thereby disconnected.<\/div>\n<\/div>\n<\/td>\n
\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\"om617<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
07.1.8-015\/5 F2<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    07.1\u2014015 Operation engine-transmission-overload protection   Engine-transmission overload protection To prevent damage to engine and transmission in the event of faulty operation or during extreme situations the engine-transmission overload protection performs 3 functions: 1.\u00a0 Engine overload protection. 2.\u00a0 Transmission overload protection. 3.\u00a0 Shifting-down automatic transmission into 1st gear when moving off.     Circuit diagram engine-, transmission-overload switch \u2014 Model 116.120 model year 1978\u20141980   1\u00a0 \u00a0 Switching unit over\u00adload protection 2\u00a0 \u00a0 Changeover valve 3\u00a0 \u00a0 Pressure switch boost air pipe 4\u00a0 \u00a0 Pressure switch transmission 5\u00a0 \u00a0 Solenoid valve automatic transmission 6\u00a0 \u00a0 Stop lamp switch 7\u00a0 \u00a0 Kickdown switch a To fuse no. 4 b To revolution counter c To clutch starter lockout switch d To stop lamps   07.1.8-015\/1 F 3       Circuit diagram engine-transmission overload switch \u2014 Model 123.193 standard version   1\u00a0 \u00a0 Switching unit over\u00adload protection 2\u00a0 \u00a0 Changeover valve 3\u00a0 \u00a0 Pressure switch boost air pipe 4\u00a0 \u00a0 Pressure switch transmission 5\u00a0 \u00a0 Solenoid valve automatic transmission 6\u00a0 \u00a0 Stop lamp switch 7\u00a0 \u00a0 Kickdown switch a To fuse no. 4 b To revolution counter c To clutch starter lockout switch d To stop lamp switch   07.1.8-015\/2 F3     Engine overload protection   Model 123.193 Model 126.120 starting model year 1981   Starting model year 1981, installation of transmission 722.303 instead of 722.120 has made the transmission overload protection unnecessary. Only an engine over\u00adload protection will be installed.   Circuit diagram engine overload protection 2\u00a0 \u00a0 Changeover valve boost air pipe 3\u00a0 \u00a0 Pressure switch boost air pipe a To fuse no. 10 (terminal 15)   07.1.8-015\/3 F3     Engine overload protection The boost air pipe is provided with a pressure switch (3) At a boost pressure above 1.1 \u00b1 0,15 bar gauge pres\u00adsure, the pressure switch will close and will connect mi\u00adnus (negative) to changeover valve (2), which is connect\u00aded to plus (positive) via terminal 15. The changeover valve interrupts the connection boost air pipe to ALDA aneroid capsule on injection pump. The aneroid capsule is connected to atmosphere and the injection fuel quantity is thereby reduced. If the pressure drops to below 1.1 \u00b1 0.15 bar gauge pressure, the pressure switch will again interrupt the minus (negative) connection and will connect the ALDA aneroid cap\u00adsule again to boost air pipe.   Model 116 1\u00a0 \u00a0 \u00a0Pressure line of boost air pipe 2\u00a0 \u00a0 Changeover valve 3\u00a0 \u00a0 Pressure line to ALDA capsule   Model 123   Model 126   07.1.8-015\/4 F2     Transmission overload protection If the pressure switch (4) is subject to a pressure below 0.3 bar gauge pressure (driving speed below approx. 8 km\/h) and if the engine speed rises to above approx. 2000\/min, e.g.when moving off on a high gradient with a fully loaded vehicle, the transmission may become overloaded by the high torque. A reduc\u00adtion of the injected fuell quantity on injection pump will prevent an engine speed increase obove approx. 2000\/min.   The rpm switch in switching unit activates the change\u00adover valve with minus (negative). Since terminal 15 provides a connection to plus (positive), the valve will switch and will provide the pressure line to ALDA capsule on injection pump with ambient pressure. This will reduce the injected fuel quantity, the engine speed will drop below 2000\/min (by approx. 100\/mtn). If engine speed drops below approx. 2000\/min, the rpm switch in switching unit (1) will interrupt the minus (negative) connection at changeover valve. The valve opens the connection to boost air pipe and will close the connection of pressure line to the atmosphere. The reduction of the injected fuel quantity is cancelled and the engine speed will increase again. This regula\u00adting cycle will be repeated until the pressure at switch (4) has attained 0.3 bar gauge pressure. The pressure switch will then close and the overload protection is thereby disconnected.   07.1.8-015\/5 F2  <\/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":[49,44],"tags":[],"class_list":["post-2901","post","type-post","status-publish","format-standard","hentry","category-injection-system","category-om617"],"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\/2901","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=2901"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2901\/revisions"}],"predecessor-version":[{"id":2902,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2901\/revisions\/2902"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}