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| techtalk:ih:oil03i [2024/09/18 04:02] – [Check Both Pump Body Gaskets] 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)) \\ |
| - Remove the drive gear from the pinion shaft. | - Remove the drive gear from the pinion shaft. |
| - Check oil pump body pins 1971<. Does it have two dowel pins in the alum body that register in the holes of the iron upper housing? It should. | - Check oil pump body pins 1971<. Does it have two dowel pins in the alum body that register in the holes of the iron upper housing? It should. |
| - Install crankcase screen. Prelube and install the oil pump. Tighten the bolts. | - Install crankcase screen. Prelube and install the oil pump. (Snug all bolts first and torque evenly to 100 in/lbs in a cross pattern). ((1970-1978 Sportster FSM, pg 3-25)) |
| - 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 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. 72-76 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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| 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)) | Tightening / adjusting the mounting nuts / bolts: \\ |
| - Drill the mounting holes in the pump body 1/64" oversize. | 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)) |
| - Remove the studs and use regular cap head screws to mount the pump. \\ That pretty well eliminates any binding issues caused by tweeked studs. | * 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. |
| | - Remove the studs and use regular cap head screws to mount the pump. That pretty well eliminates any binding issues caused by tweeked studs. |
| | * Grade 8 bolts (1/4-20 x 2") will give a better wrench feel. ((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)) |
| | * To adjust the mounting bolts (if you didn't use gasket sealer on the 3 gaskets); You may be able to leave the engine in the frame. |
| | * In this case, loosen all 5 bolts and then tighten them a little at a time. |
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| ===== Check Gearshaft for Trueness ===== | ===== Check Gearshaft for Trueness ===== |
| You can see in the pic below how the shaft was leaning into one side of the cover bore. ((pic by CanadianTux of the XLFORUM, labeled by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ | You can see in the pic below how the shaft was leaning into one side of the cover bore. ((pic by CanadianTux of the XLFORUM, labeled by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ |
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| {{techtalk:ih:oil:1971_oil_pump_gearshaft_bore_mal-repair_by_canadiantux.jpg?direct&500|}} \\ | {{techtalk:ih:oil:1972_oil_pump_gearshaft_bore_mal-repair_by_canadiantux.jpg?direct&500|}} \\ |
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| ===== Check Both Pump Body Gaskets ===== | ===== Check Both Pump Body Gaskets ===== |
| * Outer cover gasket (26258-62) | * Outer cover gasket (26258-62) |
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| | In the pic below, a -62 outer cover gasket is shown on a 1972 oil pump. \\ |
| | The gear will ride over the surface of the gear and possible create binding and heat. \\ |
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| In the pic below, a -52 oute cover gasket is shown on a 1971 oil pump. \\ | {{:techtalk:ih:oil:1972_oil_pump_w_wrong_outer_cover_gasket_pic1_by_canadiantux.jpg?direct&400|}} |
| The gear will ride over the surface of the gear and possible create a bind and heat. \\ | {{:techtalk:ih:oil:1972_oil_pump_w_wrong_outer_cover_gasket_pic2_by_canadiantux.jpg?direct&400|}} ((pics by CanadianTux of the XLFORUM, labeled by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ |
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| {{:techtalk:ih:oil:1971_oil_pump_w_wrong_-62_gasket_pic1_by_canadiantux.jpg?direct&400|}} | |
| {{:techtalk:ih:oil:1971_oil_pump_w_wrong_-62_gasket_pic2_by_canadiantux.jpg?direct&400|}} ((pics by CanadianTux of the XLFORUM, labeled by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ | |
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| ====== Check Gearset Widths ====== | ====== Check Gearset Widths ====== |
| But again, a little less oil will be pumped out due to the width difference which adds to the face clearance. \\ | But again, a little less oil will be pumped out due to the width difference which adds to the face clearance. \\ |
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| {{techtalk:ih:oil:1971_oil_pump_gear_width_difference_by_canadiantux.jpg?direct&500|}} ((pic by CanadianTux of the XLFORUM, labeled by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ | {{techtalk:ih:oil:1972_oil_pump_gear_width_difference_by_canadiantux.jpg?direct&500|}} ((pic by CanadianTux of the XLFORUM, labeled by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page6#post3439371)) \\ |
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