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| techtalk:ih:oil03i [2025/08/27 21:42] – [General advice] hippysmack | techtalk:ih:oil03i [2025/09/06 02:57] (current) – [General advice] hippysmack |
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| Installed the other way the oil can just push past the lip. \\ | Installed the other way the oil can just push past the lip. \\ |
| Be sure to push the seal all the way in or it will add resistance to turn on the gears. ((Jaime1840 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202622-74-ironhead-oil-pump-breather-valve-gear-drag-video)) \\ | Be sure to push the seal all the way in or it will add resistance to turn on the gears. ((Jaime1840 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202622-74-ironhead-oil-pump-breather-valve-gear-drag-video)) \\ |
| | Here are the official instructions for installing the seal in the pump. Click on pic to enlarge. \\ |
| | {{:techtalk:ih:oil:1958-1976_oil_pump_seal_instructions.jpg?direct&500|}} \\ |
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| Note: \\ | Note: \\ |
| For anybody who kitted their pump to add a second seal in the top cover, the open lip goes towards the gears to keep oil from getting into the breather. ((JonesL of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202676-oil-pump-seal)) \\ | For anybody who modded their pump to add a second seal in the top cover, the open lip goes towards the gears to keep oil from getting into the breather. ((JonesL of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202676-oil-pump-seal)) \\ |
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| {{:techtalk:ih:oil:57-76_oil_pump_seal_1_by_papphammar.jpg?direct&300|}} ((photo by papphammar of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/64242-1976-rebuild?t=401480)) {{:techtalk:ih:oil:57-76_oil_pump_seal_2_by_papphammar.jpg?direct&300|}} ((photo by papphammar of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/64242-1976-rebuild/page11?t=401480&page=11)) \\ | {{:techtalk:ih:oil:57-76_oil_pump_seal_1_by_papphammar.jpg?direct&300|}} ((photo by papphammar of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/64242-1976-rebuild?t=401480)) {{:techtalk:ih:oil:57-76_oil_pump_seal_2_by_papphammar.jpg?direct&300|}} ((photo by papphammar of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/64242-1976-rebuild/page11?t=401480&page=11)) \\ |
| - Check for pump binding. You can spin the pump now as there is no drive gear. | - Check for pump binding. You can spin the pump now as there is no drive gear. |
| - If bound, loosen bolts and retighten as you spin the pump. Often different torqueing sequence will resolve the bind. \\ In more extreme cases, lightly tapping of the aluminum body while bolts are half tight may shift things into better alignment. \\ Pre AMF pumps with the dowels often bolt right up with no fuss. 1972-1976 pumps with no dowel pins can be more frustrating. | - If bound, loosen bolts and retighten as you spin the pump. Often different torqueing sequence will resolve the bind. \\ In more extreme cases, lightly tapping of the aluminum body while bolts are half tight may shift things into better alignment. \\ Pre AMF pumps with the dowels often bolt right up with no fuss. 1972-1976 pumps with no dowel pins can be more frustrating. |
| | - Many 72-76 pumps will drag when installed if the breather gear isn't held to it's upper end of it's float during the bind test. \\ But the gear shouldn't be so tight that you need to pry it up. Full up drag greater than twist-off cap on a beer isn't real good. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/140992-1975-oil-pump-drive-gear-doesn-t-turn-freely#post3005050)) |
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| Tightening / adjusting the mounting nuts / bolts: \\ | Tightening / adjusting the mounting nuts / bolts: \\ |
| | Do not over tighten the oil pump bolts as that may bind up the pump and ruin it. The gaskets make up part of the oil pump clearances. ((ryder rick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/65154-oil-pump-seals)) |
| * You can modify the stud mounted pumps to use bolts instead. ((mrmom9r of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/191180-installing-72-oil-pump-on-69xlch#post4124056)) | * You can modify the stud mounted pumps to use bolts instead. ((mrmom9r of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/191180-installing-72-oil-pump-on-69xlch#post4124056)) |
| - Drill the mounting holes in the pump body 1/64" oversize. | - Drill the mounting holes in the pump body 1/64" oversize. |
