Differences

This shows you the differences between two versions of the page.

--- techtalk:ih:oil03f [2024/09/29 04:06] – [1972-1976 Inner Cover] hippysmack
+++ techtalk:ih:oil03f [2025/07/07 20:03] (current) – [1956-1976 Outer Cover] hippysmack
@@ Line 240: / Line 240: @@
 |  52-E57 ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/154753-oil-pump-spring-wake-up-call/page2?t=1661356&page=2))  |  (L) L57-E72 - (R) L72-76 ((photo by fergerburger of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/154753-oil-pump-spring-wake-up-call?t=1661356))  |  (Bottom) L57-E72 - (Top) L72-76 ((photo by The Doctor71 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/154753-oil-pump-spring-wake-up-call?t=1661356))  |
-====== Side by Side Body Comparisons ======
+====== Oil Pump Body ======
+===== Side by Side Body Comparisons =====
 |The 2nd text is "26217-56a L58-e62"((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))||
 |{{:techtalk:ih:oil:oil_pump2-2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:oil_pump2-2-_by_dr_dick.jpg?direct&200|}}|
+===== Rear Pump Body Hole/No Hole Mystery =====
+  * 1952-1955 production K Models and XR/XLR/KR racing (R) pumps are machined in the rear of the pump body for a feed bypass system. \\ It consists of a tail ball and spring with a plug screw similar to the front oil switch nipple. \\ The pump was line bored at an angle to the right (looking from top of pump) thru the vertical drilled bypass hole then thru to pressure side of the feed path. \\ The bypassed feed oil runs North from the pump into a hole in the gearcase to fall on the cam floor for scavenging. \\ The ID of the threaded hole in the pump rear is too big for the 1/8" NPT fitting used on later models.
+  * 1956 KH, 1957-1966 XL/XLH and 1958-1969 XLCH had both feed and return fittings mounted on the top rear of the case. \\ There was no feed bypass used on these models. \\ But the MoCo used the same basic body, as they were still using it to service early K Models as well as early racing pumps. \\ The hole in the rear of the 56-up KH and Sportster pump bodies was cast shut without the drilling /tapping and plug on these year pumps.
+  * 1967-1976 XLH and 1970-1976 XLCH deleted the top rear feed fitting and revised that cast shut hole for a feed oil re-route to the pump's rear side. \\ The oil feed from the tank was now plumbed directly into the oil suction galley in the rear of the oil pump. \\ An angled vertical hole was drilled from the feed side oil galley intersecting a horizontal hole drilled straight from the rear side of the pump. \\ The rear hole is now threaded for an 1/8" NPT fitting. \\ (either a 3/8" hose fitting for models the pump was intended or an 1/8" pipe plug if used on previous year models).
+|  Rear Hole Usage in Pics ((photos compiled by Hippysmack, used with permission))  |
+|{{:techtalk:ih:oil:1952-1976_k_sportster_rear_oil_pump_hole_differences.jpg?direct&400|}}|
 ====== Body Covers ======
@@ Line 251: / Line 260: @@
 |The 2 different 16T gear breather housings side by side. ((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))|
-|{{:techtalk:ih:oil:breather_housings_by_dr_dick.jpg?direct&300|}}|
+|{{:techtalk:ih:oil:breather_housings_by_dr_dick.jpg?direct&400|}}|
-==== L1962-1971 Inner Cover ====
+==== L1962-1971 Version ====
 Part# (26241-52). \\
 This version, used on 14T gear pumps, deleted the hole in the cover for the early K model feed bypass. \\
 Sold as replacement for 52-E62 K Model, Sportster oil pumps. \\
+Breather tower slot width: (.345") ((chevelle of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/108113-breather-timing-early-sportster/page2?t=989934&page=2))
 __Note__: To use this cover on 1952-1955 K Model pumps, remove body dowel pins and drill the hole for the feed bypass (if used). \\
 It has the single return oil inlet hole. Sold as replacement for 1952-1971 K Model and Sportster oil pumps. \\
+Click on any pic to enlarge. ((photos courtesy of Ebay seller, oldiron_10 [[https://www.ebay.com/sch/i.html?item=403952880197&rt=nc&_trksid=p2047675.m3561.l2562&_ssn=oldiron_10|Link to Items For Sale page]] )) \\
 {{:techtalk:ih:oil:1962l-1971_sportster_oil_pump_inner_cover_pic1_by_oldiron_10.jpg?direct&300|}} {{:techtalk:ih:oil:1962l-1971_sportster_oil_pump_inner_cover_pic2_by_oldiron_10.jpg?direct&300|}} {{:techtalk:ih:oil:1962l-1971_sportster_oil_pump_inner_cover_pic3_by_oldiron_10.jpg?direct&300|}} \\
-==== 1972-1976 Inner Cover ====
+==== 1972-1976 Version ====
 Part# (26241-52). \\
 This version, used on 16T gear pumps, deleted the hole in the cover for the early K model feed bypass. \\
 It has 2 (double barrel) return oil inlet holes. Sold as replacement for 1952-1971 K Model and Sportster oil pumps. \\
 __NOTE__: To use this cover on pre-1972 XL pumps, the body dowel pins have to be removed. \\ To use this cover on 1952-1955 K Model pumps, remove body dowel pins and drill the hole for the feed bypass (if used). \\
+Breather tower slot width: (.345") ((chevelle of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/108113-breather-timing-early-sportster/page2?t=989934&page=2)) \\
+Click on any pic to enlarge. ((photo courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] )) \\
 {{:techtalk:ih:oil:1972-1976_sportster_oil_pump_inner_cover_pic1_by_shopanucks.jpg?direct&300|}} {{:techtalk:ih:oil:1972-1976_sportster_oil_pump_inner_cover_pic2_by_shopanucks.jpg?direct&300|}}{{:techtalk:ih:oil:1972-1976_sportster_oil_pump_inner_cover_pic3_by_shopanucks.jpg?direct&300|}} \\
 ===== Outer Cover =====
 ==== 1956-1976 Outer Cover ====
-Outer cover (26250-56) was used on 1956 KH and 1957-1976 Sportster prodcution models. \\
+Outer cover (26250-56) was used on 1956 KH and 1957-1976 Sportster production models. \\
 Also used on 1956-1987 KR, KHR, XR and XLR competition models. \\
 {{:techtalk:ih:oil:1956-1976_kh_-_sportster_outer_oil_pump_cover_by_tomscybershop.jpg?direct&400|}} ((photo courtesy of TomsCyberShop.com www.TomsCyberShop.com)) \\
-===== Rear Pump Body Hole/No Hole Mystery =====
-  * 1952-1955 production K Models and XR/XLR/KR racing (R) pumps are machined in the rear of the pump body for a feed bypass system. \\ It consists of a tail ball and spring with a plug screw similar to the front oil switch nipple. \\ The pump was line bored at an angle to the right (looking from top of pump) thru the vertical drilled bypass hole then thru to pressure side of the feed path. \\ The bypassed feed oil runs North from the pump into a hole in the gearcase to fall on the cam floor for scavenging. \\ The ID of the threaded hole in the pump rear is too big for the 1/8" NPT fitting used on later models.
-  * 1956 KH, 1957-1966 XL/XLH and 1958-1969 XLCH had both feed and return fittings mounted on the top rear of the case. \\ There was no feed bypass used on these models. \\ But the MoCo used the same basic body, as they were still using it to service early K Models as well as early racing pumps. \\ The hole in the rear of the 56-up KH and Sportster pump bodies was cast shut without the drilling /tapping and plug on these year pumps.
-  * 1967-1976 XLH and 1970-1976 XLCH deleted the top rear feed fitting and revised that cast shut hole for a feed oil re-route to the pump's rear side. \\ The oil feed from the tank was now plumbed directly into the oil suction galley in the rear of the oil pump. \\ An angled vertical hole was drilled from the feed side oil galley intersecting a horizontal hole drilled straight from the rear side of the pump. \\ The rear hole is now threaded for an 1/8" NPT fitting. \\ (either a 3/8" hose fitting for models the pump was intended or an 1/8" pipe plug if used on previous year models).
-|  Rear Hole Usage in Pics ((photos compiled by Hippysmack, used with permission))  |
-|{{:techtalk:ih:oil:1952-1976_k_sportster_rear_oil_pump_hole_differences.jpg?direct&400|}}|
 ====== Oil Pump Gears ======
@@ Line 291: / Line 299: @@
 ====== Breather Gears ======
-(Missing below is the -'56 breather gear and long full profile woodruff scavenge drive key and snap-ring). ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))
-|Breather Gears ((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070)) |Some of amf's signature quality control. \\ These are 3 - 72 breather gears.((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))|A closer view((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))|
+|1956-1976 KH, Sportster Breather Gear Comparison ((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070)) |Some of amf's signature quality control. \\ These are 3 - 72 breather gears.((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))|A closer view of -72 gears ((photos by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page14?postcount=204#post2437070))|
 |{{:techtalk:ih:oil:breather_gears_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:breather_gears_2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:breather_gears_3_by_dr_dick.jpg?direct&300|}}|

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