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techtalk:ref:oil06 [2019/05/24 14:54] – [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**: \\ **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. \\
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-|  77-85 covers w/ feed hole in arm. ((photo by Hippysmack))  |  86-90 covers without the feed hole in the arm. ((photo by Hippysmack))  | +| 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: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|}}|+|{{: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 change**: \\ **Feed gerotor surface depth change**: \\

Trace: • REF: Oiling & Lubrication