{"id":2824,"date":"2023-11-17T22:42:42","date_gmt":"2023-11-17T21:42:42","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2824"},"modified":"2023-11-17T22:42:42","modified_gmt":"2023-11-17T21:42:42","slug":"removal-and-installation-of-pre-chambers","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/17\/removal-and-installation-of-pre-chambers\/","title":{"rendered":"Removal and installation of pre-chambers"},"content":{"rendered":"

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01\u2014417 Removal and installation of pre-chambers<\/strong><\/div>\n<\/div>\n<\/td>\n
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Data<\/strong><\/div>\n<\/div>\n<\/td>\n
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Pre-chamber standout on cylinder head dimension „c” <\/em>7.8\u20148.4 mm<\/div>\n<\/div>\n<\/td>\n
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Tightening torques<\/strong><\/div>\n
Coupling nuts of injection lines Nuts for cylinder head cover Pre-chamber in cylinder head (threaded ring) Nozzle holder in pre-chamber<\/div>\n
Special tools<\/strong><\/div>\n
Open box wrench insert, 17 mm, 1\/2″ square socket for injection lines<\/div>\n
Socket 27 mm, 1\/2″ square socket<\/div>\n
Socket wrench for threaded ring of pre-chamber<\/div>\n
Puller for pre-chamber<\/div>\n<\/div>\n<\/td>\n
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\"om617<\/div>\n<\/td>\n
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Nm<\/div>\n
25<\/div>\n
15<\/div>\n
150-180<\/div>\n
70-80<\/div>\n
000\u00a0589 68 03 00<\/div>\n
001\u00a0 589 65 09 00 615 589 00 07 00<\/div>\n
615 589 00 33 00<\/div>\n<\/div>\n<\/td>\n
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Note<\/strong><\/div>\n<\/div>\n<\/td>\n
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The prechambers of engines 616.912 and 617.912 may not be installed on these engines.<\/div>\n
For identification, a code number (617\/03) is shown at upper flange of pre-chamber.<\/div>\n
In addition, the pre-chamber can be identified by means of the smaller bore (0\u20149 mm dia.) for glow<\/div>\n
Plug.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 A Prechamber<\/div>\n
engines 616.912\/617.912<\/div>\n
B Prechamber<\/div>\n
engines 61 7.950\/951 \/952<\/div>\n<\/div>\n<\/td>\n
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\"om617<\/div>\n<\/td>\n
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1053-8622A2<\/strong><\/div>\n<\/div>\n<\/td>\n
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01.8-417\/1 F2<\/div>\n<\/div>\n<\/td>\n
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Six burner bores of different diameter are in place in pre-chamber lower half (burner neck) at different levels and angle positions.<\/div>\n
The firing duct (H) has a diameter of 8 mm, the burner neck (J) of 16 mm.<\/div>\n<\/div>\n<\/td>\n
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H<\/div>\n<\/div>\n<\/td>\n
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Firing (<\/div>\n<\/div>\n<\/td>\n
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iuct<\/div>\n<\/div>\n<\/td>\n
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J<\/div>\n<\/div>\n<\/td>\n
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neck<\/div>\n<\/div>\n<\/td>\n
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bore<\/div>\n<\/div>\n<\/td>\n
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Burner<\/div>\n<\/div>\n<\/td>\n
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bore<\/div>\n<\/div>\n<\/td>\n
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bore<\/div>\n<\/div>\n<\/td>\n
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bore<\/div>\n<\/div>\n<\/td>\n
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Bore for glow plug<\/div>\n<\/div>\n<\/td>\n
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In addition, the pre-chamber bottom is of spherical shape.<\/div>\n
The spherical shape provides uniform wall thickness in range of burner bores.<\/div>\n<\/div>\n<\/td>\n
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Removal<\/strong><\/div>\n<\/div>\n<\/td>\n
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1 Disconnect regulating linkage to remove cylinder head cover. Pull out locking eye of longitudinal regulating shaft (arrow).<\/div>\n
On models 116.120 and 123, pull longitudinal regulating shaft out of rubber mount in forward direction and remove in rearward direction.<\/div>\n<\/div>\n<\/td>\n
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Model 116.120<\/div>\n<\/div>\n<\/td>\n
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On model 126.120, pull longitudinal regulating shaft out of guide lever in rearward direction and remove in forward direction.<\/div>\n<\/div>\n<\/td>\n
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Model 123<\/div>\n<\/div>\n<\/td>\n
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01.8\u2014417\/2 F2<\/div>\n<\/div>\n<\/td>\n
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On models 123 with automatic transmission 722.303 (W4A040) and 126.120, pull off central plug for vacuum lines (71) or vacuum lines. Disconnect bowden wire, compress black plastic clip (arrow) and pull bowden wire out of holder in rearward direction.<\/div>\n<\/div>\n<\/td>\n
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Model 126.120<\/div>\n<\/div>\n<\/td>\n
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2\u00a0 \u00a0Remove injection lines.<\/div>\n
3\u00a0 \u00a0Pull fuel return hoses from injection nozzles.<\/div>\n<\/div>\n<\/td>\n
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4 Unscrew complete nozzle holder by means of socket (27 mm).<\/div>\n<\/div>\n<\/td>\n
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01.8-417\/3 F2<\/div>\n<\/div>\n<\/td>\n
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5 Unscrew rod-type glow plugs (81).<\/div>\n<\/div>\n<\/td>\n
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46\u00a0 \u00a0 \u00a0Cylinder head gasket<\/div>\n
50\u00a0 \u00a0 \u00a0Threaded ring<\/div>\n
51\u00a0 \u00a0 \u00a0Pre-chamber<\/div>\n
52\u00a0 \u00a0 \u00a0Sealing ring<\/div>\n
53\u00a0 \u00a0 \u00a0Nozzle reed<\/div>\n
80\u00a0 \u00a0 \u00a0Nozzle holder<\/div>\n
81\u00a0 \u00a0 \u00a0 Rod-type glow plug<\/div>\n<\/div>\n<\/td>\n
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6 Unscrew threaded ring (50) by means of socket wrench.<\/div>\n
For this purpose, screw insert (03) into threaded ring, place sleeve (02) into grooves of threaded ring (arrows) and tighten with nut (01).<\/div>\n<\/div>\n<\/td>\n
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03 Screw insert<\/div>\n<\/div>\n<\/td>\n
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Sleeve (02) should be seated in grooves tight enough to prevent slipping out of grooves when the threaded ring is released.<\/div>\n
Position wrench against hex. head of sleeve (02) and unscrew threaded ring.<\/div>\n<\/div>\n<\/td>\n
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01\u00a0 \u00a0Nut<\/div>\n
02\u00a0 \u00a0Sleeve<\/div>\n<\/div>\n<\/td>\n
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01.8-417\/4 F2<\/div>\n<\/div>\n<\/td>\n
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7 Pull-out pre-chamber by means of puller. Screw spindle (01) into pre-chamber. Place bell-shaped member (03) on cylinder head. The contact surface of the bell-shaped member is provided with 2 lugs. One lug each should be seated in hex. or double hex. socket of cylinder head bolt adjacent to pre-chamber. Pull-out pre-chamber by rotating nut (02) with an open-end wrench.<\/div>\n<\/div>\n<\/td>\n
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01\u00a0 \u00a0 Spindle<\/div>\n
02\u00a0 \u00a0 Nut<\/div>\n
03\u00a0 \u00a0 Bell<\/div>\n<\/div>\n<\/td>\n
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8 Remove sealing ring (arrow) from cylinder head.<\/div>\n<\/div>\n<\/td>\n
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9 Cover bore in cylinder head.<\/div>\n<\/div>\n<\/td>\n
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Installation<\/strong><\/div>\n<\/div>\n<\/td>\n
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Note: <\/strong>If the removed pre-chambers are installed again, check for perfect condition.<\/div>\n
Ball pin should not be burnt or scaled.<\/div>\n
In addition, if burner tops are scorched or if pre-chamber lower half shows cracks, remove boost air pipe and check inside for traces of oil.<\/div>\n<\/div>\n<\/td>\n
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01.8-417\/5 F2<\/div>\n<\/div>\n<\/td>\n
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If oil-moist spots are found, check diaphragm of vacuum pump on engine 617.950 (@)up to 1979 for cracks and other damage or renew vacuum control unit on injection pump of all engines.<\/div>\n
The faulty component is identified by means of the vacuum lines (blackened by oil).<\/div>\n<\/div>\n<\/td>\n
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10 Place new sealing ring (52) into cylinder head. Use original sealing ring of specified thickness and shape only, so that the required distance (c) of 7.8\u20148.4 mm between pre-chamber and cylinder head is maintained.<\/div>\n
Note: <\/strong>If a cylinder head has been faced at parting surface, add thicker sealing rings (52) between cylinder head and pre-chamber when installing pre-chambers.<\/div>\n<\/div>\n<\/td>\n
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The following sealing rings are available:<\/div>\n<\/div>\n<\/td>\n
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Thickness<\/div>\n<\/div>\n<\/td>\n
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Part No.<\/div>\n<\/div>\n<\/td>\n
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1.9-2.1 (standard)<\/div>\n<\/div>\n<\/td>\n
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61501700 60<\/div>\n<\/div>\n<\/td>\n
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2.2-2.4<\/div>\n<\/div>\n<\/td>\n
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615 017 01 60<\/div>\n<\/div>\n<\/td>\n
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61501702 60<\/div>\n<\/div>\n<\/td>\n
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615 017 03 60<\/div>\n<\/div>\n<\/td>\n
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11 Screw spindle (01) of puller into pre-chamber (illustration item 7). Position pre-chamber in such a manner that the lug faces recess in cylinder head (arrows).<\/div>\n
Insert pre-chamber by means of light blows with a plastic hammer against spindle. Pull bell-shaped mem\u00adber (03) with one hand in upward direction and hold in place (illustration item 7).<\/div>\n<\/div>\n<\/td>\n
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01.8-417\/6 F2<\/div>\n<\/div>\n<\/td>\n
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12\u00a0 \u00a0 Lubricate threaded ring (50) and tighten to specified torque of 150\u2014180 Nm by means of pertinent socket wrench.<\/div>\n
13\u00a0 \u00a0Screw-in pencil element glow plugs and connect.<\/div>\n
14\u00a0 \u00a0 Insert new nozzle plate (53 Fig. item 5). The resilient nozzle plate can be installed on all engines.<\/div>\n<\/div>\n<\/td>\n
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53 Nozzle plate<\/div>\n
80\u00a0 \u00a0 \u00a0Nozzle holder<\/div>\n
81\u00a0 \u00a0 \u00a0Pencil element glow plug<\/div>\n<\/div>\n<\/td>\n
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15\u00a0 \u00a0Completely screw-in nozzle holder and tighten to 70-80 Nm.<\/div>\n
16\u00a0 \u00a0 Install injection lines.<\/div>\n
17\u00a0 \u00a0 Plug fuel return hoses to injection nozzles.<\/div>\n
18\u00a0 \u00a0 Mount cylinder head cover.<\/div>\n<\/div>\n<\/td>\n
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    01\u2014417 Removal and installation of pre-chambers   Data   Pre-chamber standout on cylinder head dimension „c” 7.8\u20148.4 mm   Tightening torques Coupling nuts of injection lines Nuts for cylinder head cover Pre-chamber in cylinder head (threaded ring) Nozzle holder in pre-chamber Special tools Open box wrench insert, 17 mm, 1\/2″ square socket for injection lines Socket 27 mm, 1\/2″ square socket Socket wrench for threaded ring of pre-chamber Puller for pre-chamber Nm 25 15 150-180 70-80 000\u00a0589 68 03 00 001\u00a0 589 65 09 00 615 589 00 07 00 615 589 00 33 00   Note   The prechambers of engines 616.912 and 617.912 may not be installed on these engines. For identification, a code number (617\/03) is shown at upper flange of pre-chamber. In addition, the pre-chamber can be identified by means of the smaller bore (0\u20149 mm dia.) for glow Plug.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 A Prechamber engines 616.912\/617.912 B Prechamber engines 61 7.950\/951 \/952 1053-8622A2   01.8-417\/1 F2       Six burner bores of different diameter are in place in pre-chamber lower half (burner neck) at different levels and angle positions. The firing duct (H) has a diameter of 8 mm, the burner neck (J) of 16 mm. H Firing ( iuct 8 mm dia J Burner neck 16 mm dia K Burner bore 2 mm dia L Burner bore 3.5 mm dia M Burner bore 2.5 mm dia N Burner bore 3.2 mm dia 0 Bore for glow plug 9 mm dia   In addition, the pre-chamber bottom is of spherical shape. The spherical shape provides uniform wall thickness in range of burner bores.   Removal 1 Disconnect regulating linkage to remove cylinder head cover. Pull out locking eye of longitudinal regulating shaft (arrow). On models 116.120 and 123, pull longitudinal regulating shaft out of rubber mount in forward direction and remove in rearward direction. Model 116.120   On model 126.120, pull longitudinal regulating shaft out of guide lever in rearward direction and remove in forward direction. Model 123   01.8\u2014417\/2 F2       On models 123 with automatic transmission 722.303 (W4A040) and 126.120, pull off central plug for vacuum lines (71) or vacuum lines. Disconnect bowden wire, compress black plastic clip (arrow) and pull bowden wire out of holder in rearward direction. Model 126.120   2\u00a0 \u00a0Remove injection lines. 3\u00a0 \u00a0Pull fuel return hoses from injection nozzles.   4 Unscrew complete nozzle holder by means of socket (27 mm).   01.8-417\/3 F2       5 Unscrew rod-type glow plugs (81). 46\u00a0 \u00a0 \u00a0Cylinder head gasket 50\u00a0 \u00a0 \u00a0Threaded ring 51\u00a0 \u00a0 \u00a0Pre-chamber 52\u00a0 \u00a0 \u00a0Sealing ring 53\u00a0 \u00a0 \u00a0Nozzle reed 80\u00a0 \u00a0 \u00a0Nozzle holder 81\u00a0 \u00a0 \u00a0 Rod-type glow plug   6 Unscrew threaded ring (50) by means of socket wrench. For this purpose, screw insert (03) into threaded ring, place sleeve (02) into grooves of threaded ring (arrows) and tighten with nut (01). 03 Screw insert   Sleeve (02) should be seated in grooves tight enough to prevent slipping out of grooves when the threaded ring is released. Position wrench against hex. head of sleeve (02) and unscrew threaded ring. 01\u00a0 \u00a0Nut 02\u00a0 \u00a0Sleeve   01.8-417\/4 F2         7 Pull-out pre-chamber by means of puller. Screw spindle (01) into pre-chamber. Place bell-shaped member (03) on cylinder head. The contact surface of the bell-shaped member is provided with 2 lugs. One lug each should be seated in hex. or double hex. socket of cylinder head bolt adjacent to pre-chamber. Pull-out pre-chamber by rotating nut (02) with an open-end wrench. 01\u00a0 \u00a0 Spindle 02\u00a0 \u00a0 Nut 03\u00a0 \u00a0 Bell   8 Remove sealing ring (arrow) from cylinder head.   9 Cover bore in cylinder head.   Installation   Note: If the removed pre-chambers are installed again, check for perfect condition. Ball pin should not be burnt or scaled. In addition, if burner tops are scorched or if pre-chamber lower half shows cracks, remove boost air pipe and check inside for traces of oil.   01.8-417\/5 F2       If oil-moist spots are found, check diaphragm of vacuum pump on engine 617.950 (@)up to 1979 for cracks and other damage or renew vacuum control unit on injection pump of all engines. The faulty component is identified by means of the vacuum lines (blackened by oil).   10 Place new sealing ring (52) into cylinder head. Use original sealing ring of specified thickness and shape only, so that the required distance (c) of 7.8\u20148.4 mm between pre-chamber and cylinder head is maintained. Note: If a cylinder head has been faced at parting surface, add thicker sealing rings (52) between cylinder head and pre-chamber when installing pre-chambers.   The following sealing rings are available: Thickness Part No. 1.9-2.1 (standard) 61501700 60 2.2-2.4 615 017 01 60 2.5-2.7 61501702 60 2.8-3.0 615 017 03 60   11 Screw spindle (01) of puller into pre-chamber (illustration item 7). Position pre-chamber in such a manner that the lug faces recess in cylinder head (arrows). Insert pre-chamber by means of light blows with a plastic hammer against spindle. Pull bell-shaped mem\u00adber (03) with one hand in upward direction and hold in place (illustration item 7).   01.8-417\/6 F2       12\u00a0 \u00a0 Lubricate threaded ring (50) and tighten to specified torque of 150\u2014180 Nm by means of pertinent socket wrench. 13\u00a0 \u00a0Screw-in pencil element glow plugs and connect. 14\u00a0 \u00a0 Insert new nozzle plate (53 Fig. item 5). The resilient nozzle plate can be installed on all engines. 53 Nozzle plate 80\u00a0 \u00a0 \u00a0Nozzle holder 81\u00a0 \u00a0 \u00a0Pencil element glow plug   1073-8020\/1   15\u00a0 \u00a0Completely screw-in nozzle holder and tighten to 70-80 Nm. 16\u00a0 \u00a0 Install injection lines. 17\u00a0 \u00a0 Plug fuel return hoses to injection nozzles. 18\u00a0 \u00a0 Mount cylinder head cover.   01.8-417\/7 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":[46,44],"tags":[],"class_list":["post-2824","post","type-post","status-publish","format-standard","hentry","category-crankcase-and-cylinder-head","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\/2824","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=2824"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2824\/revisions"}],"predecessor-version":[{"id":2825,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2824\/revisions\/2825"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2824"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2824"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}