{"id":2929,"date":"2023-11-17T23:57:15","date_gmt":"2023-11-17T22:57:15","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2929"},"modified":"2023-11-17T23:57:15","modified_gmt":"2023-11-17T22:57:15","slug":"checking-vacuum-shutoff-for-leaks","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/17\/checking-vacuum-shutoff-for-leaks\/","title":{"rendered":"Checking vacuum shutoff for leaks"},"content":{"rendered":"

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07.1\u2014150 Checking vacuum shutoff for leaks<\/div>\n<\/div>\n<\/td>\n
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Job no. of flat rates or standard texts and flat rates data 07-8222 or 8225.<\/div>\n<\/div>\n<\/td>\n
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A. Without Tester<\/div>\n<\/div>\n<\/td>\n
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Note concerning diaphragm vacuum pump<\/strong><\/div>\n
Installed:<\/div>\n
Model 116 up to model year 1979.<\/div>\n
Model 116 starting model year 1980,123 and<\/div>\n
126 are provided with piston vacuum pumps.<\/div>\n
If engine oil appears in vacuum lines or brake booster, you may find that the diaphragm in the vacuum con\u00adtrol unit or the one in the vacuum pump is defective.<\/div>\n
The appearance of engine oil necessitates the replace\u00adment of the vacuum control unit and also of the vacuum lines carrying oil. The vacuum pump will have to be repaired and the brake booster exchanged if they show oil at the vacuum line connection.<\/div>\n
Leakage through the vacuum pump diaphragm or through the vacuum control unit at the injection pump will allow engine oil to reach the combustion chambers through the suction pipe, causing a higher combustion temperature which may damage the precombustion chambers.<\/div>\n
If the full length of the vacuum lines is a dark black it may be assumed that engine oil has entered the combustion chamber. In this case you are advised to check all the precombustion chambers.<\/div>\n
Precombustion chambers which are cracked at the bottom or have burnt (scaly) ball pin surfaces, have to be exchanged because engine damage due to breaking precombustion chamber parts will other\u00adwise have to be taken into account.<\/div>\n<\/div>\n<\/td>\n
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Checking<\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Run engine.<\/div>\n
2\u00a0 \u00a0 \u00a0 \u00a0 Disconnect vacuum line (brown) at Tee piece (7) and check whether pressure is negative or not.<\/div>\n<\/div>\n<\/td>\n
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07.1.8-150\/1 F3<\/div>\n<\/div>\n<\/td>\n
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a) Should this not be the case, unscrew vacuum line with Tee piece at vacuum pump and brake booster.<\/div>\n
Check throttle in Tee piece for obstructions, blowing out with compressed air if necessary.<\/div>\n
Note: <\/strong>On vehicles with diaphragm vacuum pump. If throttle is oiled up, diaphragm in vacuum pump may be defective. Throttle is defective, if engine oil shows up at connection of vacuum line (pump end). Reconditioning of vaccuum pump is described in repair instructions brakes model 115 and 123 (42\u2014620).<\/div>\n<\/div>\n<\/td>\n
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b) If pressure at Tee piece is negative, connect vacuum control unit (3) straight to Tee piece (7) via a hose.<\/div>\n
The vacuum from vacuum pump (8) now acts direct<\/div>\n
on the diaphragm in vacuum control unit (3) and<\/div>\n
draws the injection pump control rod to the stop<\/div>\n
position.<\/div>\n
Exchange the vacuum control unit if engine does<\/div>\n
not stop immediately (07.1\u2014220).<\/div>\n<\/div>\n<\/td>\n
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Immediate stoppage of engine means that vacuum control unit is in good working order. In this case, trouble may be due to sticking of valve (Din steering lock. Exchange valve with reference to repair in\u00adstructions for steering system models 115 and 123 (46-640).<\/div>\n
Attention:<\/strong><\/div>\n
Do not cross vacuum lines when reconnecting.<\/div>\n<\/div>\n<\/td>\n
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3 Run engine. Check vacuum control unit and valve in steering lock for satisfactory operation, and examine injection pump for leakage.<\/div>\n<\/div>\n<\/td>\n
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07.1.8-150\/2 F2<\/div>\n<\/div>\n<\/td>\n
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1<\/div>\n<\/div>\n<\/td>\n
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Valve<\/div>\n<\/div>\n<\/td>\n
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6<\/div>\n<\/div>\n<\/td>\n
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T-piece with integratied throttle<\/div>\n<\/div>\n<\/td>\n
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a<\/div>\n<\/div>\n<\/td>\n
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Suction line<\/div>\n<\/div>\n<\/td>\n
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2<\/div>\n<\/div>\n<\/td>\n
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Cam plate<\/div>\n<\/div>\n<\/td>\n
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7<\/div>\n<\/div>\n<\/td>\n
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Vacuum pump<\/div>\n<\/div>\n<\/td>\n
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b<\/div>\n<\/div>\n<\/td>\n
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Vent line<\/div>\n<\/div>\n<\/td>\n
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3<\/div>\n<\/div>\n<\/td>\n
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Vacuum control unit<\/div>\n<\/div>\n<\/td>\n
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8<\/div>\n<\/div>\n<\/td>\n
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Vacuum control unit transmission<\/div>\n<\/div>\n<\/td>\n
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c<\/div>\n<\/div>\n<\/td>\n
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Central lock<\/div>\n<\/div>\n<\/td>\n
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4<\/div>\n<\/div>\n<\/td>\n
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Brake booster<\/div>\n<\/div>\n<\/td>\n
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9<\/div>\n<\/div>\n<\/td>\n
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Change-over valve<\/div>\n<\/div>\n<\/td>\n
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d<\/div>\n<\/div>\n<\/td>\n
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Control line<\/div>\n<\/div>\n<\/td>\n
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5<\/div>\n<\/div>\n<\/td>\n
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Check valve<\/div>\n<\/div>\n<\/td>\n
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10<\/div>\n<\/div>\n<\/td>\n
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Vacuum control valve<\/div>\n<\/div>\n<\/td>\n
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br = brown br\/bl = brown\/blue sw\/rt = black\/red sw\/gn = black\/green sw = black sw\/ws = black\/white<\/div>\n<\/div>\n<\/td>\n
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07.1.8-150\/3<\/div>\n<\/div>\n<\/td>\n
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B. With tester<\/div>\n<\/div>\n<\/td>\n
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Data<\/strong><\/div>\n<\/div>\n<\/td>\n
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Permissible system leakage<\/div>\n<\/div>\n<\/td>\n
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6 mbar\/min at 400 mbar negative pressure<\/div>\n<\/div>\n<\/td>\n
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Permissible leakage at component parts<\/div>\n<\/div>\n<\/td>\n
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5 mbar\/min at 300 mbar negative pressure<\/div>\n<\/div>\n<\/td>\n
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Mating length at connections<\/div>\n<\/div>\n<\/td>\n
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12 \u00b1 2 <\/strong>mm<\/div>\n<\/div>\n<\/td>\n
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Color coding of vacuum lines for diesel engine key starting system<\/strong><\/div>\n<\/div>\n<\/td>\n
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Vacuum line<\/div>\n<\/div>\n<\/td>\n
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Color code<\/div>\n<\/div>\n<\/td>\n
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Suction line from distributor to valve for key starting system (100)<\/div>\n<\/div>\n<\/td>\n
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brown<\/div>\n<\/div>\n<\/td>\n
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Control line from key starting system valve to vacuum control unit of injection pump (101)<\/div>\n<\/div>\n<\/td>\n
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brown\/blue<\/div>\n<\/div>\n<\/td>\n
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Special tool<\/strong><\/div>\n<\/div>\n<\/td>\n
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Tester for vacuum and gauge pressure<\/div>\n<\/div>\n<\/td>\n
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201 589 13 21 00<\/div>\n<\/div>\n<\/td>\n
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Checking<\/strong><\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 \u00a0 \u00a0 Turn ignition key in steering lock to posi\u00adtion „2”.<\/div>\n
2\u00a0 \u00a0 \u00a0 \u00a0 Pull brown line (br) out of connection (17) and connect tester (83) to brown line (br).<\/div>\n<\/div>\n<\/td>\n
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07.1.8-150\/4 F3<\/div>\n<\/div>\n<\/td>\n
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Evacuate tester (83).<\/div>\n<\/div>\n<\/td>\n
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4\u00a0 \u00a0 \u00a0 \u00a0 Rising pressure on gage means that key starting system valve at steering lock is subject to leakage.<\/div>\n
5\u00a0 \u00a0 \u00a0 \u00a0 Exchange key starting system valve at steering lock (46-640).<\/div>\n
Attention:<\/div>\n
Prior to exchanging key starting system valve and vacuum control unit of injection pump, check hose lines and connectors.<\/div>\n<\/div>\n<\/td>\n
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6\u00a0 \u00a0 \u00a0 \u00a0 Turn ignition key in steering lock back to position „1” or”0″.<\/div>\n
7\u00a0 \u00a0 \u00a0 \u00a0 Evacuate system using tester (83).<\/div>\n
8\u00a0 \u00a0 \u00a0 \u00a0 Rising pressure on gage may imply that vacuum control unit or valve is subject to leakage.<\/div>\n<\/div>\n<\/td>\n
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9 Disconnect control line (101) with connector (17) from vacuum control unit of injection pump.<\/div>\n<\/div>\n<\/td>\n
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07.1.8-150\/5 F2<\/div>\n<\/div>\n<\/td>\n
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10\u00a0 \u00a0 \u00a0 Connect tester (83) to vacuum control unit and evacuate.<\/div>\n
11\u00a0 \u00a0 \u00a0 \u00a0Rising pressure on gage means that vacuum control unit of injection pump is subject to leakage.<\/div>\n
12\u00a0 \u00a0 \u00a0 Exchange vacuum control unit of injection pump (07.1-220).<\/div>\n
13\u00a0 \u00a0 \u00a0 Constant pressure on gage means that vacuum control unit of injection pump is in order and that key starting valve is subject to leakage. Exchange key starting system valve (46\u2014640).<\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 Valve<\/div>\n
2\u00a0 \u00a0 Cam<\/div>\n
3\u00a0 \u00a0 Vacuum control unit<\/div>\n
4\u00a0 \u00a0 Brake booster<\/div>\n
5\u00a0 \u00a0 Check valve<\/div>\n<\/div>\n<\/td>\n
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6<\/div>\n<\/div>\n<\/td>\n
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T-fitting with installed<\/div>\n<\/div>\n<\/td>\n
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a<\/div>\n<\/div>\n<\/td>\n
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Suction<\/div>\n<\/div>\n<\/td>\n
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line<\/div>\n<\/div>\n<\/td>\n
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throttle (orifice)<\/div>\n<\/div>\n<\/td>\n
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b<\/div>\n<\/div>\n<\/td>\n
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Positive<\/div>\n<\/div>\n<\/td>\n
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vent line<\/div>\n<\/div>\n<\/td>\n
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7<\/div>\n<\/div>\n<\/td>\n
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Vacuum pump<\/div>\n<\/div>\n<\/td>\n
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c<\/div>\n<\/div>\n<\/td>\n
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Central<\/div>\n<\/div>\n<\/td>\n
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lock<\/div>\n<\/div>\n<\/td>\n
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8<\/div>\n<\/div>\n<\/td>\n
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Vacuum control unit for<\/div>\n<\/div>\n<\/td>\n
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d<\/div>\n<\/div>\n<\/td>\n
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Control<\/div>\n<\/div>\n<\/td>\n
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line<\/div>\n<\/div>\n<\/td>\n
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transmission<\/div>\n<\/div>\n<\/td>\n
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9<\/div>\n<\/div>\n<\/td>\n
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Changeover valve<\/div>\n<\/div>\n<\/td>\n
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10<\/div>\n<\/div>\n<\/td>\n
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Vacuum control valve<\/div>\n<\/div>\n<\/td>\n
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br =brown br\/bl = brown\/blue sw\/rt = black\/red sw\/gn = black\/green sw = black sw\/ws = black\/white<\/div>\n<\/div>\n<\/td>\n
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    07.1\u2014150 Checking vacuum shutoff for leaks   Job no. of flat rates or standard texts and flat rates data 07-8222 or 8225.   A. Without Tester   Note concerning diaphragm vacuum pump Installed: Model 116 up to model year 1979. Model 116 starting model year 1980,123 and 126 are provided with piston vacuum pumps. If engine oil appears in vacuum lines or brake booster, you may find that the diaphragm in the vacuum con\u00adtrol unit or the one in the vacuum pump is defective. The appearance of engine oil necessitates the replace\u00adment of the vacuum control unit and also of the vacuum lines carrying oil. The vacuum pump will have to be repaired and the brake booster exchanged if they show oil at the vacuum line connection. Leakage through the vacuum pump diaphragm or through the vacuum control unit at the injection pump will allow engine oil to reach the combustion chambers through the suction pipe, causing a higher combustion temperature which may damage the precombustion chambers. If the full length of the vacuum lines is a dark black it may be assumed that engine oil has entered the combustion chamber. In this case you are advised to check all the precombustion chambers. Precombustion chambers which are cracked at the bottom or have burnt (scaly) ball pin surfaces, have to be exchanged because engine damage due to breaking precombustion chamber parts will other\u00adwise have to be taken into account.   Checking   1\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Run engine. 2\u00a0 \u00a0 \u00a0 \u00a0 Disconnect vacuum line (brown) at Tee piece (7) and check whether pressure is negative or not.   07.1.8-150\/1 F3       a) Should this not be the case, unscrew vacuum line with Tee piece at vacuum pump and brake booster. Check throttle in Tee piece for obstructions, blowing out with compressed air if necessary. Note: On vehicles with diaphragm vacuum pump. If throttle is oiled up, diaphragm in vacuum pump may be defective. Throttle is defective, if engine oil shows up at connection of vacuum line (pump end). Reconditioning of vaccuum pump is described in repair instructions brakes model 115 and 123 (42\u2014620).   b) If pressure at Tee piece is negative, connect vacuum control unit (3) straight to Tee piece (7) via a hose. The vacuum from vacuum pump (8) now acts direct on the diaphragm in vacuum control unit (3) and draws the injection pump control rod to the stop position. Exchange the vacuum control unit if engine does not stop immediately (07.1\u2014220).   Immediate stoppage of engine means that vacuum control unit is in good working order. In this case, trouble may be due to sticking of valve (Din steering lock. Exchange valve with reference to repair in\u00adstructions for steering system models 115 and 123 (46-640). Attention: Do not cross vacuum lines when reconnecting.   3 Run engine. Check vacuum control unit and valve in steering lock for satisfactory operation, and examine injection pump for leakage.   07.1.8-150\/2 F2         1 Valve 6 T-piece with integratied throttle a Suction line 2 Cam plate 7 Vacuum pump b Vent line 3 Vacuum control unit 8 Vacuum control unit transmission c Central lock 4 Brake booster 9 Change-over valve d Control line 5 Check valve 10 Vacuum control valve     br = brown br\/bl = brown\/blue sw\/rt = black\/red sw\/gn = black\/green sw = black sw\/ws = black\/white   07.1.8-150\/3       B. With tester   Data   Permissible system leakage 6 mbar\/min at 400 mbar negative pressure Permissible leakage at component parts 5 mbar\/min at 300 mbar negative pressure Mating length at connections 12 \u00b1 2 mm Color coding of vacuum lines for diesel engine key starting system   Vacuum line Color code Suction line from distributor to valve for key starting system (100) brown Control line from key starting system valve to vacuum control unit of injection pump (101) brown\/blue Special tool     Tester for vacuum and gauge pressure 201 589 13 21 00   Checking 1\u00a0 \u00a0 \u00a0 \u00a0 Turn ignition key in steering lock to posi\u00adtion „2”. 2\u00a0 \u00a0 \u00a0 \u00a0 Pull brown line (br) out of connection (17) and connect tester (83) to brown line (br).   07.1.8-150\/4 F3       Evacuate tester (83).   4\u00a0 \u00a0 \u00a0 \u00a0 Rising pressure on gage means that key starting system valve at steering lock is subject to leakage. 5\u00a0 \u00a0 \u00a0 \u00a0 Exchange key starting system valve at steering lock (46-640). Attention: Prior to exchanging key starting system valve and vacuum control unit of injection pump, check hose lines and connectors.   6\u00a0 \u00a0 \u00a0 \u00a0 Turn ignition key in steering lock back to position „1” or”0″. 7\u00a0 \u00a0 \u00a0 \u00a0 Evacuate system using tester (83). 8\u00a0 \u00a0 \u00a0 \u00a0 Rising pressure on gage may imply that vacuum control unit or valve is subject to leakage.   9 Disconnect control line (101) with connector (17) from vacuum control unit of injection pump.   07.1.8-150\/5 F2       10\u00a0 \u00a0 \u00a0 Connect tester (83) to vacuum control unit and evacuate. 11\u00a0 \u00a0 \u00a0 \u00a0Rising pressure on gage means that vacuum control unit of injection pump is subject to leakage. 12\u00a0 \u00a0 \u00a0 Exchange vacuum control unit of injection pump (07.1-220). 13\u00a0 \u00a0 \u00a0 Constant pressure on gage means that vacuum control unit of injection pump is in order and that key starting valve is subject to leakage. Exchange key starting system valve (46\u2014640).     1\u00a0 \u00a0 Valve 2\u00a0 \u00a0 Cam 3\u00a0 \u00a0 Vacuum control unit 4\u00a0 \u00a0 Brake booster 5\u00a0 \u00a0 Check valve 6 T-fitting with installed a Suction line   throttle (orifice) b Positive vent line 7 Vacuum pump c Central lock 8 Vacuum control unit for d Control line   transmission       9 Changeover valve       10 Vacuum control valve       br =brown br\/bl = brown\/blue sw\/rt = black\/red sw\/gn = black\/green sw = black sw\/ws = black\/white   07.1.8-150\/6 F3        <\/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-2929","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\/2929","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=2929"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2929\/revisions"}],"predecessor-version":[{"id":2930,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2929\/revisions\/2930"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}