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techtalk:ih:oil01u [2020/09/15 04:00] hippysmack [Venting the Primary] |
techtalk:ih:oil01u [2021/02/19 15:52] hippysmack [Venting the Primary] |
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| (where the air is expelled along with crankcase pressure out the breather vent) \\ | (where the air is expelled along with crankcase pressure out the breather vent) \\ | ||
| Without a vent once the transfer valve is plugged off, primary venting is severely hindered if not bottled up entirely. \\ | Without a vent once the transfer valve is plugged off, primary venting is severely hindered if not bottled up entirely. \\ | ||
| - | It is possible to blow the sprocket seal or primary gasket without a vent to atmosphere over the primary or tranny. \\ | + | It is possible to blow the sprocket seal, starter gasket or primary gasket without a vent to atmosphere over the primary or tranny. \\ |
| See Venting the Primary below. \\ | See Venting the Primary below. \\ | ||
| Line 34: | Line 34: | ||
| - | | The transfer below valve below was packed with JB Weld to negate it's operation. ((photos by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1095756#post1095756)) || | + | | The transfer below valve below was packed with JB Weld to negate it's operation. ((photos by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1095756#post1095756)) || Transfer valve removed, plug installed. ((photo by lofimofo of the XLFORUM http://xlforum.net/forums/showthread.php?t=1578633)) | |
| - | |{{:techtalk:ih:oil:plugging_the_transfer_valve_1_by_jtrapass.jpg?direct&300|}}| {{:techtalk:ih:oil:plugging_the_transfer_valve_2_by_jtrapass.jpg?direct&300|}}| | + | |{{:techtalk:ih:oil:plugging_the_transfer_valve_1_by_jtrapass.jpg?direct&300|}}| {{:techtalk:ih:oil:plugging_the_transfer_valve_2_by_jtrapass.jpg?direct&300|}}|{{:techtalk:ih:oil:transfer_valve_hole_plugged_by_lofimofo.jpg?direct&300|}}| |
| ====== Venting the Primary ====== | ====== Venting the Primary ====== | ||
| Line 52: | Line 52: | ||
| * However, any non-tin cover bike with a blocked transfer will piss out the vent of the primary filler plug. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3)) \\ It's usually futile to retain the plug vent due to oil weep. Plugging that vent and installing a vent some where else is a good route. | * However, any non-tin cover bike with a blocked transfer will piss out the vent of the primary filler plug. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3)) \\ It's usually futile to retain the plug vent due to oil weep. Plugging that vent and installing a vent some where else is a good route. | ||
| * The primary filler plug part numbers are (34742-52A) for 54-70 and (34742-71) for 71 to 76. (Fridge of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3)) | * The primary filler plug part numbers are (34742-52A) for 54-70 and (34742-71) for 71 to 76. (Fridge of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=3)) | ||
| - | * **You can use the 77-up venting location on 70-76 engines**: | + | * **You can use the 77-80 venting location on 70-76 engines**: |
| * You can install a vent plug (like the 34744-77 tranny vent) through one of the holes on top of the cases, just in front of the rear engine mount bracket. | * You can install a vent plug (like the 34744-77 tranny vent) through one of the holes on top of the cases, just in front of the rear engine mount bracket. | ||
| * Those two bolt holes are used for the oil tank bracket (xlch model) or battery carrier bracket (xlh model). ((JBM of the XLFORUM http://xlforum.net/forums/showthread.php?t=146064)) \\ '77-up ironheads have this 3/4"x16 vent fitting factory installed in this location (transfer valve deleted in '77). | * Those two bolt holes are used for the oil tank bracket (xlch model) or battery carrier bracket (xlh model). ((JBM of the XLFORUM http://xlforum.net/forums/showthread.php?t=146064)) \\ '77-up ironheads have this 3/4"x16 vent fitting factory installed in this location (transfer valve deleted in '77). | ||
| Line 69: | Line 69: | ||
| {{:techtalk:ih:oil:installing_a_transmission_vent_1_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) {{:techtalk:ih:oil:installing_a_transmission_vent_2_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) \\ | {{:techtalk:ih:oil:installing_a_transmission_vent_1_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) {{:techtalk:ih:oil:installing_a_transmission_vent_2_by_jtrapass.jpg?direct&300|}} ((photo by Jtrapass of the XLFORUM http://xlforum.net/forums/showthread.php?p=1082313#post1082313)) \\ | ||
| + | 1977-1980 models use a fitting (34744-77) with a SAE 3/8" x 16 (x app. 7/16") bolt pattern that has a 1/4" hose nipple on the other end. \\ | ||
| + | {{:techtalk:ih:oil:1977_tranny_vent_pic3_by_on_.....jpg?direct&300|}} ((photo by on½.... of the XLFORUM http://xlforum.net/forums/showthread.php?p=5541672&highlight=transmission+vent#post5541672)) {{:techtalk:ih:oil:1977-1978_transmission_vent_by_hopper.jpg?direct&300|}} ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=209347&page=11)) \\ | ||
