Differences

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--- techtalk:ih:oil03 [2023/12/31 21:19]
hippysmack
+++ techtalk:ih:oil03 [2024/05/03 20:24]
hippysmack [Oil Pump Volume (1957-1985)]
@@ Line 64: / Line 64: @@
 (running at 4,000 RPM, the oil pump is turning at 2,000 RPM) \\
-====== Oil Pump Pressure (57-85) ======
+====== Oil Pump Pressure (1957-1985) ======
 See also [[techtalk:ref:oil15|Installing an Oil Pressure Gauge]] in the REF section of the Sportsterpedia. \\
@@ Line 93: / Line 93: @@
 {{:techtalk:ih:oil:oil_pressure_gauge_1_by_dieselox4.jpg?direct&300|}} ((photo by Dieselox4 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/134952-where-how-to-mount-custom-oil-pressure-gauge?t=1456449)) {{:techtalk:ih:oil:oil_pressure_gauge_2_by_dieselox4.jpg?direct&300|}} ((photo by Dieselox4 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/134952-where-how-to-mount-custom-oil-pressure-gauge?t=1456449))
-===== Oil Pump Fittings and Oil Paths =====
+====== Oil Pump Volume (1957-1985) ======
+It is not stated in the manuals how much oil these pumps will deliver. \\
+However, testing has been done to find out the flow rates for the (feed side only) on the -72 gear pump. \\
+Testing has also been done on (both feed and return sides) on 1977-up gerotor pumps. \\
+See the links below for those articles in the Sportsterpedia. \\
+  *  [[techtalk:ref:oil24#measuring_feed_oil_volume_flow_rate_of_the_-72_gear_type_oil_pump|Measuring Feed Oil Volume (flow rate) of the -72 Gear Type Oil Pump]] Includes testing and result summaries.
+  *  [[techtalk:ref:oil22#measuring_output_volume_flow_rate_of_a_gerotor_oil_pump|Measuring Output Volume (flow rate) of a Gerotor Oil Pump]]: Measuring by flow rate by cc'ing gerotors as well as bench testing in real time.
+    * [[techtalk:ref:oil22p|Charted result summaries from cc'ing the gerotors]].
+Oil pressure has a direct relationship with oil flow rate. \\
+Oil pressure also changes throughout the feed path. The most pressure will always be at the oil pump. \\
+Oil pressure is reduced as oil travels though the restrictions in the engine. \\
+The manuals state the oil pump will deliver it's entire content under pressure. \\
+And that is true, with exception. The oil pressure under normal riding conditions is generally low. \\
+As RPM goes up, the oil flow goes up and the pressure in the feed path goes up. \\
+As RPM goes down, the oil flow goes down and the pressure in the feed path goes down. \\
+The caveat is the outlet sizes (restrictions) in the oil feed path. The outlets are very small orifices (crankpin and rockers). \\
+As RPM goes up, flow increases and the outlets get flooded with more oil pushing thru them. \\
+If oil can't get thru outlets as fast as pump is pushing the oil, pressure rises on the incoming side of outlets. \\
+Faster flow thru the outlets = less pressure in the feed path, slower flow thru the feed paths = more pressure in the feed path. \\
+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. \\
+====== Oil Pump Fittings and Oil Paths ======
 [[techtalk:ih:oil04|Click Here]] to reference the Oil Tank, Lines and Routing page in the Sportsterpedia.
@@ Line 120: / Line 144: @@
 |1977-1982 Sportster|12036|Outer divider plate oil seal (between divider plates). \\ Use only with outer plate 26493-75|{{ :techtalk:ih:oil:1977-1982_sportster_oil_pump_shaft_seal_12036_by_57harleyrider_pic3.jpg?linkonly |Pic}} ((photos courtesy of Ebay seller, 57harleyrider. [[https://www.ebay.com/str/57harleyrider|Link to Ebay Store]] ))|
 |1983-1990 Sportster|12036A|Shaft oil seal between divider plates. \\ Use only with outer plate 26493-75A|{{ :techtalk:ih:oil:1983-1990_sportster_oil_pump_shaft_seal_12036a_by_boneyard_cycles.jpg?linkonly |Pic}} ((photos courtesy of Boneyard Cycles in Melbourne, FL))|
+====== Internal leaks ======
+Generally, oil will leak into the motor on shutdown (especially on extended shutdown periods). \\
+For more information on that, [[techtalk:ref:oil10|Click Here]] to view "Sit Sumping" in the REF section of the Sportsterpedia. \\
+Below is concerning an issue with gaskets or seals where either oil / air or both leak into the motor while riding. \\
+{{:techtalk:ih:oil:1977-up_sportster_oil_pump_internal_gasket_leak_by_hippysmack.gif?direct|}}
 ====== Priming the Oil Pump ======
@@ Line 132: / Line 164: @@
     * 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 the pump and on to the engine using this technique and it avoids having to mess with the sending unit.
     * With this homemade tool, all you have to do is use a grease gun (without grease) filled with oil and pump it into the system so a dry start can be avoided. {{:techtalk:ref:tools:check_ball_tester_and_prelube_fitting_by_bustert.jpg?direct&300|}} ((photo by bustert of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/168986-oil-pump-check-fixes/page2?t=1813185&page=2))
 ====== 1957-1976 Gear Driven Pumps ======

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