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techtalk:evo:oil03 [2024/05/07 00:42]
– hippysmack |
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techtalk:evo:oil03 [2024/05/07 00:43] (current)
– hippysmack |
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| | 86-90 Oil Pump Oiling Paths. ((photo by Hippysmack)) | 91-97 Oil Pump Oiling Paths ((photo by Hippysmack)) | 98 and Up Oil Pump Oiling Paths ((photo by bsaman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/rubber-mount-sportster-motorcycle-talk-2004-2006/87615-crank-replacement-documentation/page2?t=691283&page=2)) | |
| |{{:techtalk:evo:oil:86-90_oil_pump_oiling_paths_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:91-97_oil_pump_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:98-up_oil_pump_oiling_paths_by_bsaman.jpg?direct&300|}}| |
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| ====== Oil Pump - Complete Unit Part Numbers ====== |
|
| **1986-1990 Models - XL P/N = 26204-86**\\ |
| - pump body catalog p/n 26484-86\\ |
| - pump body casting p/n 26485-\\ |
| ... casting p/n is in return cavity\\ |
| ... also has a "2" stamped next to casting #\\ |
| ... also has a "T" stamped into opposite return cavity\\ |
| - bottom cover catalog p/n 26486-86\\ |
| - bottom cover casting p/n 26487-86\\ |
|
| **1991-1996 Models - XL P/N = 26204-91**\\ |
| - pump body casting p/n in 26485-90 \\ |
| ... casting p/n is in the return cavity\\ |
| ... also has casting #s 1 and 380 in opposite return cavity\\ |
| - pump cover casting p/n 26487-90\\ |
| ... casting p/n is on the outside of the cover\\ |
|
| **1997 Models - XL P/N = 26204-91**\\ |
| - pump body casting p/n in 26485-90A \\ |
| ... casting p/n is in the return cavity\\ |
| - pump cover casting p/n 26487-90A\\ |
| ... casting p/n is on the outside of the cover\\ |
|
| **1998-1999 Models - XL P/N = 26204-98**\\ |
| - From the internal P/N changes it appears that this new\\ |
| ... P/N was generated because of a change in the\\ |
| ... Gear Shaft and Gerotor Return set of gears\\ |
| - has body casting P/N 26487-98 in the return cavity\\ |
| - has bottom cover casting P/N 26487-98 on the outside\\ |
|
| **2000-2006 Models - XL P/N = 26204-91A**\\ |
| - P/N change appears to be related to fitting changes \\ |
| … feed inlet and outlet have -A suffix but no change in fitting size \\ |
| - has bottom cover casting P/N 26487-98\\ |
|
| **2007-later Models - XL P/N = 26204-91A (new design)**\\ |
| - **is a different design w/same P/N** (How crazy is that?)\\ |
| - is retrofitable to 1991-2006\\ |
| - has body casting P/N 26211-07 in the return cavity\\ |
| - has bottom cover casting P/N 26213-07 on the outside\\ |
|
| **Buell P/N - 26357-02B**\\ |
| - same pump as XL 26204-91A (new design) but with different fittings\\ |
| - will bolt up but you need to change the fittings over to XL style\\ |
| - has bottom cover casting P/N 26213-07\\ |
|
| **Buell P/N - 26357-02**\\ |
| - Same pump as 1998-1999 XL 26204-98 but with different fittings \\ |
| … same gerotors, same cover casting number \\ |
|
| See these XLForum threads:\\ |
| https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/43858-evo-sportster-engine-oil-pump-up-date?t=135265\\ |
| https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/rubber-mount-sportster-motorcycle-talk-2004-2006/161897-which-oil-pump-buell-26357-02b-or-xl-2007-26204-91a?t=1738158 |
|
| ====== Oil Pump Function ====== |
|
| This is why pressure is always highest on cold startup and pressure falls as the oil heats up. \\ |
| Colder oil is thicker and more resistant to flow. Hotter oil is thinner less resistant to flow. \\ |
|
|
| ====== Priming the Oil Pump ====== |
|
| * Another way to prime the pump is to use assembly lube on the gerotors and inside of the pump before installing it. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/163867-cam-cover-removal#post3491821)) \\ Then you have an instant hydraulic seal to help the oil pump suck oil from the hose. |
| * You can also using a large syringe with a tapered tip inserted into the oil supply hose on the bottom of the oil tank. ((ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/196980-vapor-lock-on-77-and-later-oil-pumps#post4303198)) \\ Then you can force feed oil to the pump and on to the engine using this technique. \\ |
|
====== Oil Pump - Complete Unit Part Numbers ====== |
|
**1986-1990 Models - XL P/N = 26204-86**\\ |
- pump body catalog p/n 26484-86\\ |
- pump body casting p/n 26485-\\ |
... casting p/n is in return cavity\\ |
... also has a "2" stamped next to casting #\\ |
... also has a "T" stamped into opposite return cavity\\ |
- bottom cover catalog p/n 26486-86\\ |
- bottom cover casting p/n 26487-86\\ |
|
**1991-1996 Models - XL P/N = 26204-91**\\ |
- pump body casting p/n in 26485-90 \\ |
... casting p/n is in the return cavity\\ |
... also has casting #s 1 and 380 in opposite return cavity\\ |
- pump cover casting p/n 26487-90\\ |
... casting p/n is on the outside of the cover\\ |
|
**1997 Models - XL P/N = 26204-91**\\ |
- pump body casting p/n in 26485-90A \\ |
... casting p/n is in the return cavity\\ |
- pump cover casting p/n 26487-90A\\ |
... casting p/n is on the outside of the cover\\ |
|
**1998-1999 Models - XL P/N = 26204-98**\\ |
- From the internal P/N changes it appears that this new\\ |
... P/N was generated because of a change in the\\ |
... Gear Shaft and Gerotor Return set of gears\\ |
- has body casting P/N 26487-98 in the return cavity\\ |
- has bottom cover casting P/N 26487-98 on the outside\\ |
|
**2000-2006 Models - XL P/N = 26204-91A**\\ |
- P/N change appears to be related to fitting changes \\ |
… feed inlet and outlet have -A suffix but no change in fitting size \\ |
- has bottom cover casting P/N 26487-98\\ |
|
**2007-later Models - XL P/N = 26204-91A (new design)**\\ |
- **is a different design w/same P/N** (How crazy is that?)\\ |
- is retrofitable to 1991-2006\\ |
- has body casting P/N 26211-07 in the return cavity\\ |
- has bottom cover casting P/N 26213-07 on the outside\\ |
|
**Buell P/N - 26357-02B**\\ |
- same pump as XL 26204-91A (new design) but with different fittings\\ |
- will bolt up but you need to change the fittings over to XL style\\ |
- has bottom cover casting P/N 26213-07\\ |
|
**Buell P/N - 26357-02**\\ |
- Same pump as 1998-1999 XL 26204-98 but with different fittings \\ |
… same gerotors, same cover casting number \\ |
|
See these XLForum threads:\\ |
https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/43858-evo-sportster-engine-oil-pump-up-date?t=135265\\ |
https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/rubber-mount-sportster-motorcycle-talk-2004-2006/161897-which-oil-pump-buell-26357-02b-or-xl-2007-26204-91a?t=1738158 |
|
| ====== Oil Pump Gaskets / Seals ====== |
