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techtalk:ref:oil06 [2019/05/16 23:27] hippysmack [Oil Pump Covers] |
techtalk:ref:oil06 [2024/01/19 01:18] (current) hippysmack |
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| [[techtalk:ih:oil03#oil_pump|77-85 Oil Pump]] in the IH section of the Sportsterpedia. \\ | [[techtalk:ih:oil03#oil_pump|77-85 Oil Pump]] in the IH section of the Sportsterpedia. \\ | ||
| [[techtalk:evo:oil03|86-Present Oil Pump]] in the Evo section of the Sportsterpedia. \\ | [[techtalk:evo:oil03|86-Present Oil Pump]] in the Evo section of the Sportsterpedia. \\ | ||
| - | ===== Comparing 77-85, 98-06 and 07 and up Pumps ===== | + | |
| + | ====== Return to Feed Ratios ====== | ||
| + | 1977-1985 feed gerotors have the smallest volume and smallest of the gerotor pumps used on Sportsters. \\ | ||
| + | 1986-2006 feed gerotors have the same volume. \\ | ||
| + | 1977-1997 return gerotors have the same volume. \\ | ||
| + | 1998-2006 return gerotors have the same volume. \\ | ||
| + | 1977-2006 gerotors all have the same teeth profile (bodies changed OD but volume per height stayed the same). \\ | ||
| + | 2007-present are the tallest and also have a different teeth profile. \\ | ||
| + | |||
| + | * **77-85 return to feed ratio app 2.78:1** | ||
| + | * Return Height: .500", Feed Height: .180" | ||
| + | * **86-90 return to feed ratio app 1.89:1** | ||
| + | * Return Height: .500", Feed Height: .265" | ||
| + | * **91-97 return to feed ratio app 1.89:1** | ||
| + | * Return Height: .500", Feed Height: .265" | ||
| + | * **98-06 return to feed ratio app 2.64:1** | ||
| + | * Return Height: .700", Feed Height: .265" | ||
| + | * **07-up return to feed ratio app 4.25:1** | ||
| + | * Return Height: .850", Feed Height: .200" | ||
| + | |||
| + | ====== Return hole in the "duck bill" ====== | ||
| + | The size of the crankcase oil inlet hole inside the duck bill changed a couple times. \\ | ||
| + | 1977-1990 return inlet hole ID = 0.250" \\ | ||
| + | 1991-1997 return inlet hole ID = 0.280" \\ | ||
| + | 1998-Present return inlet hole ID = 0.350" \\ | ||
| + | |||
| + | {{:techtalk:ref:oil:1977-present_sportster_oil_pump_return_inlet_id_by_hippysmack.jpg?direct&400|}} \\ | ||
| + | |||
| + | ====== Comparing 77-85, 98-06 and 07 and up Pumps ======= | ||
| With a 98 style gasket on the 79 pump, the gasket fits nice and snug as it should be. \\ | With a 98 style gasket on the 79 pump, the gasket fits nice and snug as it should be. \\ | ||
| There were 3 different fitting changes to the 77-81 pump but the body stayed the same. \\ | There were 3 different fitting changes to the 77-81 pump but the body stayed the same. \\ | ||
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| |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_1_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_1_by_hippysmack.jpg?direct&300|}}| | ||
| - | The 79, 98 and 07 pumps were bolted to and outlined on the aluminum sheet. ((photos by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071153&page=6)) \\ | + | The 79, 98 and 07 pumps were bolted to and outlined on the aluminum sheet. ((photos by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/194881-let-s-study-the-77-85-oil-pump-parts-and-changes-and-when/page6?t=2071153&page=6)) \\ |
| |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77-98-07_oil_pump_comparison_1._by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77-98-07_oil_pump_comparison_1._by_hippysmack.jpg?direct&300|}}| | ||
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| |{{:techtalk:ref:oil:sportster_gerotor_oil_pump_comparison_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:sportster_gerotor_oil_pump_comparison_9_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:sportster_gerotor_oil_pump_comparison_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:sportster_gerotor_oil_pump_comparison_9_by_hippysmack.jpg?direct&300|}}| | ||
| - | ===== 77-85 and 86-90 Oil Pump Comparison ===== | + | ====== 77-85 and 86-90 Oil Pump Comparison ====== |
| The 79-85 pump was bolted to and outlined on the aluminum sheet. \\ | The 79-85 pump was bolted to and outlined on the aluminum sheet. \\ | ||
| The 86-80 pump was then bolted to the sheet clearly within the mark of the 79-85 pump. \\ | The 86-80 pump was then bolted to the sheet clearly within the mark of the 79-85 pump. \\ | ||
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| |{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_7_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_8_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_7_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_86_oil_pump_comparison_8_by_hippysmack.jpg?direct&300|}}| | ||
| - | ==== Feed Gerotors ==== | + | ===== Feed Gerotors ===== |
| **77-85**: \\ | **77-85**: \\ | ||
| 77-85 feed gerotors are the same size with the exception of the L83 removal of the chamfer on the outside of the set. \\ | 77-85 feed gerotors are the same size with the exception of the L83 removal of the chamfer on the outside of the set. \\ | ||
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| |{{:techtalk:ref:oil:feed_gerotor_evolution_77-85.jpg?direct&300|}}|{{:techtalk:ref:oil:feed_gerotor_evolution_86-06.jpg?direct&300|}}|{{:techtalk:ref:oil:feed_gerotor_evolution_07-up.jpg?direct&300|}}| | |{{:techtalk:ref:oil:feed_gerotor_evolution_77-85.jpg?direct&300|}}|{{:techtalk:ref:oil:feed_gerotor_evolution_86-06.jpg?direct&300|}}|{{:techtalk:ref:oil:feed_gerotor_evolution_07-up.jpg?direct&300|}}| | ||
| - | ==== Return (scavenge) Gerotors ==== | + | ===== Return (scavenge) Gerotors ===== |
| **77-90**: \\ | **77-90**: \\ | ||
| 77-85 return gerotors are the same size with the exception of the L83 removal of the chamfer on the outside of the set. \\ | 77-85 return gerotors are the same size with the exception of the L83 removal of the chamfer on the outside of the set. \\ | ||
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| - | ==== Oil Pump Covers ==== | + | ===== Oil Pump Covers ===== |
| + | **86-90 cover on 77-85 pump body**: \\ | ||
| Installing an 86 cover on the 77-85 oil pump creates problems. \\ | Installing an 86 cover on the 77-85 oil pump creates problems. \\ | ||
| 77-90 oil pump covers look identical from the outside. \\ | 77-90 oil pump covers look identical from the outside. \\ | ||
| - | The visual difference is that the 77-85 pump has an oil pressure switch on the front and the 86-90 pump has a hose fitting there. \\ | + | The only visual difference on the outside is that the 77-85 pump has an oil pressure switch on the front and the 86-90 pump has a hose fitting there. \\ |
| Take the fittings off the ends and it looks as if they would be interchangeable. \\ | Take the fittings off the ends and it looks as if they would be interchangeable. \\ | ||
| The factory oil fittings are different which can give clues to the year model used on. \\ | The factory oil fittings are different which can give clues to the year model used on. \\ | ||
| But these fittings do get changed from time to time from different owners. | But these fittings do get changed from time to time from different owners. | ||
| - | But looking on the inside, there is a feed hole in the arm of the 77-85 pumps that doesn't exist in the later pump covers. \\ | + | Looking on the inside, there is a feed hole in the arm of the 77-85 pumps that doesn't exist in the later pump covers. \\ |
| This is the oil feed hole to the engine on 77-85 engines. \\ | This is the oil feed hole to the engine on 77-85 engines. \\ | ||
| 86-90 oil pumps route the feed out to an external oil filter and back into a separate cavity in the pump body to feed the engine. \\ | 86-90 oil pumps route the feed out to an external oil filter and back into a separate cavity in the pump body to feed the engine. \\ | ||
| - | (so the feed hole in the arm is not needed on them) \\ | + | (so the feed hole in the arm is not needed in the cover on 86-90 pumps) \\ |
| - | | 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | | + | 86-90 engines are fed oil from a passage in the pump body instead of the cover. \\ |
| - | |{{:techtalk:ih:oil:77-85_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-90_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}| | + | |
| + | |||
| + | | L83 pump body and 86-90 cover. ((photo by jlv of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196850-oil-pump-iron-1000-1979-bizarre#post4301658)) | 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | | ||
| + | |{{:techtalk:ref:oil:77-85_oil_pump_with_86-90_cover_by_jlv.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-90_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}| | ||
| - | **Feed gerotor surface depth chabge**: \\ | + | **Feed gerotor surface depth change**: \\ |
| + | Modding the 86-90 cover by drilling the hole out in the arm won't be an adequate fix to adapt it for use on a 77-85 pump body. \\ | ||
| The scavenge gerotors are the same size in 77-90 pumps. \\ | The scavenge gerotors are the same size in 77-90 pumps. \\ | ||
| However, the feed gerotors got bigger in 86. \\ | However, the feed gerotors got bigger in 86. \\ | ||
