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techtalk:ih:oil01t [2020/08/08 00:22] hippysmack [Plugging the Transfer Valve] |
techtalk:ih:oil01t [2020/08/08 00:24] hippysmack |
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| ====== Further Study of the Transfer Valve Operation and Affects of Plugging the Valve ====== | ====== Further Study of the Transfer Valve Operation and Affects of Plugging the Valve ====== | ||
| \\ | \\ | ||
| - | ====== Plug it or Not? ====== | + | |
| + | |||
| + | |||
| + | ====== Plug the Transfer Valve or Not? ====== | ||
| There are many debates over the actual function of the transfer valve as well as plugging it. \\ | There are many debates over the actual function of the transfer valve as well as plugging it. \\ | ||
| Line 38: | Line 41: | ||
| ====== Removing the Transfer Valve ====== | ====== Removing the Transfer Valve ====== | ||
| See [[techtalk:ih:oil01#removing_installing_the_transfer_valve|Removing / Installing the Transfer Valve]] in the Sportsterpedia. \\ | See [[techtalk:ih:oil01#removing_installing_the_transfer_valve|Removing / Installing the Transfer Valve]] in the Sportsterpedia. \\ | ||
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| - | ====== Plugging the Valve / Hole ====== | ||
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| - | When plugging the transfer valve; \\ | ||
| - | With the dual function of moving excess oil leakage from sit sumping and venting primary compartment air, consensus says to also install a primary vent as well. \\ | ||
| - | See Venting the Primary below. \\ | ||
| - | |||
| - | **Options for plugging the vent/hole**: \\ | ||
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| - | * Epoxy the valve. | ||
| - | * Using JB Weld to plug the hole in the transfer valve has been done by many with good results. \\ However, the valve needs to be cleaned of all oil and debris first or it can lose it's adherence, travel, and find it's way into the crankcase. \\ It's best to remove the transfer valve before plugging it so you don't accidently get anything in the crankcase. \\ The valve can be removed with a square drive pipe plug that sits flush with left hand crankcase side. ((buster of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=6)) \\ Pop out the screen, (you wont need it) and the hole is behind it. Clean and dry the hole and plug it with JB Weld or something similar. ((Buck101 of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=4)) | ||
| - | * Weld the hole in the valve. | ||
| - | * If you can access a welder, you can weld the hole in the valve shut (removed first). ((Ivan RoachCoach of the XLFORUM http://xlforum.net/forums/showthread.php?t=774775)) | ||
| - | * Plug the valve. | ||
| - | * You can drill & tap the hole in the valve to accept either an #8-32 or #10-32 soft brass screw and thread that screw in there all slathered in red Loctite. \\ Once it's in there, distort the screw's head by peening it with a small punch so it can't back out. ((Ivan RoachCoach of the XLFORUM http://xlforum.net/forums/showthread.php?t=774775)) | ||
| - | * Plug the case. | ||
| - | * HD made a plug (24571-72r) for the transfer hole used on XR-750. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=2)) | ||
| - | * You can remove the transfer valve and make a dummy threaded plug to replace it. The threads are 3/4"-16. | ||
| - | * You could split the cases, remove / discard the transfer valve and drill and tap the hole for a bolt. | ||
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| - | | 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)) || | ||
| - | |{{: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|}}| | ||
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| - | ====== Venting the Primary ====== | ||
| - | |||
| - | With the transfer valve plugged, the primary can't breath as it can with the transfer valve functioning. \\ | ||
| - | That air path would now be blocked. \\ | ||
| - | Technically, the primary has a vent other than the transfer valve being the clearance in the clutch cable where it enters the primary. \\ | ||
| - | That can also act as a vent as air can enter and escape there (the part where the actual cable goes into the threaded piece that screws into the clutch cable hole). ((Buck101 of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=4)) ((CrazyHorse of the XLFORUM http://xlforum.net/forums/showthread.php?t=150130&page=4)) \\ | ||
| - | There is slack (slop) where the cable end is pressure fitted ( by slack adjustment of cable) into the threaded piece. \\ | ||
| - | There is air space open along the cables path through the threaded piece also. \\ | ||
| - | This would give you a vent of sorts as this is not sealed up and pressure would escape at this point. \\ | ||
| - | |||
| - | **Installing a dedicated primary vent**: \\ | ||
| - | |||
| - | * You can drill a tiny hole in the primary access plug. \\ | ||
| - | * 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) \\ Short frame cases use 4 bolts and 3 studs to hold the rear mount to the cases. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=4)) Long frame cases use 2 bolts and 3 studs. \\ On long frame cases the front two bolts were dropped to make room for the electric leg. \\ The XLH battery box / oil bracket was bolted in the vacated area. This is where the vent bolt for 77> was positioned. \\ These bracket bolts are in a position where trans oil don't seem to get tossed as much. So they don't eject much oil. \\ All 76< long frame cases (except 71XLCH) will accept the vent bolt in the 77> position. Bolt goes in the hole closest to the case parting seam. \\ Conversely, installing the vent bolt in any of the four short frame rear mount bolt holes usually results in drips from the vent. | ||
| - | * On <69 engines, you can drill and tap a hole at the top of the case on the primary side and tee into the vent line going to the oil tank. ((simeli of the XLFORUM http://xlforum.net/forums/showthread.php?t=776527&page=4)) | ||
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| - | The vent below was made with a bolt with a hole drilled through the center of it. That hole was counter-bored 7/32" on top and tapped 1/4"-28 to fit a brake bleeder screw. \\ | ||
| - | The bottom half of the bleeder valve was cut off to make it fit the hole better and to hold the battery stand mount down. \\ | ||
| - | A small hose was slid over the bleeder screw routed down. \\ | ||
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| - | {{: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)) \\ | ||
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