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techtalk:ref:oil06 [2019/05/16 23:37] – [Oil Pump Covers] hippysmacktechtalk:ref:oil06 [2024/08/28 01:33] (current) – [77-Present Sportster Oil Pump Comparisons] hippysmack
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 ====== REF: Oiling & Lubrication ====== ====== REF: Oiling & Lubrication ======
  
-====== 77-Present Sportster Oil Pump Comparisons ======+====== 1977-Present Sportster Oil Pump Comparisons ======
 Links to more oil pump pics and dims in the Sportsterpedia; \\ Links to more oil pump pics and dims in the Sportsterpedia; \\
 [[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. \\
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 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. \\

Trace: • EVO: Engine Mechanicals - Sub-04C • REF: Oiling & Lubrication