IH: Oiling & Lubrication - Sub-03F

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[[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
====== IH: Oiling & Lubrication - Sub-03F ======
====== 1957-1976 Oil Pump - Pics, Parts Lists and Information ======
===== Sub Documents =====
  * [[techtalk:ref:engmech04k|Breather Valves (1957-Up)]] (list of breather valve changes)
  * [[techtalk:ref:engmech07g|Further Study of the Timed Breather Valve]]

The parts charts below represent what each oil pump part number should have looked like when new. \\

  * There are 3 basic pumps & 2 basic plumbing styles ((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))
    - Both feed and return are drilled passages in the right crankcase (57-66 all) & (67-69 xlch)
    - Only return drilled thru case. feed goes from tank to pump by external hose. (67-69 xlh) & (70-76 all)
  * With the correct knowledge any 57-76 pump, or parts of them can be mated to any 57-76 cases. But the combos can get confusing. ((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))
  * The stock slot in pre & post -72 pump bodies is .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))
  * The stock slot in pre -72 pump gear is .375" ((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))
  * The stock slot in post -72 pump gear is .625" ((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))

====== 1957-E1962 Pumps and Changes ======
  * There are (3 variations) and these all use 16t gear sets and style 1 plumbing ((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))
  * The production changes made during its run: ((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))
    * **1957-E1958**: Baseline pump that all others came from. \\ It has no oil seal and uses a snap ring and a full profile woodruff key at the scavenge gear. 
    * **L1958-1959**: The body is now machined for an oil seal.
    * **1960-E1962**: The retaining ring at the scavenge gear was replaced by half moon retainers. \\ The scavenge drive gear is counter-bored for these half moons and the woodruff key is shortened so it won't interfere with the half moons.

    * Feed Gears: \\ O.D. (1.115" OD) ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626)) \\ Width (.185") ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626))
    * Return Gears: \\ O.D. (1.115" OD) ((Dim provided by Kurt Melancon)) \\ Width (.343") ((Dim provided by Kurt Melancon))
    * Driven Gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))
    * Idler Gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))

===== 1957-1958 Version =====
Pump assembly (26203-52C) is basically the same as the 1956 KH model oil pump (-52B). Pump speed is 1/2 engine RPM. \\
1952-1955 K Model pumps have a feed bypass system built into them which was deleted in the 1956 pump version. \\
The 1956-1958 pump body has the rear port cast shut starting in 1956 (as this is where the 52-55 feed bypass was installed). \\

The 1957 pump has the same pump body, 16T gears, covers and breather gear with a new check ball spring and oil switch nipple. \\
1952-E1958 pump bodies were not machined for an oil seal between the feed and return gears. \\
The L1958 pump body was the first to be machined for the seal between the feed and return gears (no part number change). \\

**1957-1958 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|Return Gear \\ (idler)|
|26203-52C|26215-52|26217-56|26241-52|26250-56|26318-37|26323-52|26322-52|26320-56|26326-52|
|Idler Gear \\ Shaft|Breather Gear|Feed Gear \\ Lock Pin|Return Gear \\ Woodruff Key|Breather Shaft \\ Ret Ring|Oil Pump \\ Check Ball \\ (with tail)|Oil Pump \\ Check \\ Spring|Oil Pump \\ Switch \\ Nipple|Oil Pressure \\ Switch - exc. \\ XLC/XLCH|Oil Switch \\ Nipple Plug \\ (XLCH)|
|26327-52|26331-56|603|26347-15|11002|26400-52A|26364-57|26420-57|26550-57|45830-48|
|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil Pump Seal \\ (L1958)|  ||||||
|26258-52|26259-52|26256-52|26227-58|:::||||||

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:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic1_by_oldiron_10.jpg?direct&300|}} 
{{:techtalk:ih:oil:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic2_by_oldiron_10.jpg?direct&300|}} 
{{:techtalk:ih:oil:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic3_by_oldiron_10.jpg?direct&300|}} \\

{{:techtalk:ih:oil:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic4_by_oldiron_10.jpg?direct&300|}} 
{{:techtalk:ih:oil:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic5_by_oldiron_10.jpg?direct&300|}} 
{{:techtalk:ih:oil:1956_kh_1957-e1958_xl_xlh_xlc_xlch_oil_pump_body_pic6_by_oldiron_10.jpg?direct&300|}} \\

===== 1959-E1960 Version =====
Pump assembly (26203-52D) went through several changes without an assembly part# change. Pump speed is 1/2 engine RPM. \\
All versions of this pump use 16T gears. \\
Pump body (26217-56A) was used from L1958-E1962. It is the same as 56KH to E58 XL body but machined for the seal between the feed and return gears. \\

**1959-E1960 Version**: \\
1959 pump is the exact same as the L58 pump with the only change being the oil switch check ball (with tail) was replaced with a 3/8" round ball. \\
E1960 pump additons include an oil pressure switch rubber boot except for XLC and XLCH models and a new oil pressure switch. \\
In L1960, a breather and scavenger gear set (26330-56) was sold to update 56-E62 K Model and Sportster pumps to the L1960 pump configuration. \\

**1959-E1960 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|Return Gear \\ (idler)|
|26203-52D|26215-52|26217-56A|26241-52|26250-56|26318-37|26323-52|26322-52|26320-56|26326-52|
|Idler Gear \\ Shaft|Breather Gear|Feed Gear \\ Lock Pin|Return Gear \\ Woodruff Key|Breather Shaft \\ Ret Ring|Oil Pump \\ Check Ball \\ (no tail)|Oil Pump \\ Check \\ Spring|Oil Pump \\ Switch \\ Nipple|Oil Pressure \\ Switch - exc \\ XLCH (59)|Oil Pressure \\ Switch - exc \\ XLCH (60)|
|26327-52|26331-56|603|26347-15|11002|8866|26364-57|26420-57|26550-57|16551-39B|
|Oil Switch \\ Rubber \\ Boot (60)|Oil Switch \\ Nipple \\ Plug (XLCH)|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil \\ Pump \\ Seal|  ||||
|26553-58|45830-48|26258-52|26259-52|26256-52|26227-58|:::||||

Pump body (26217-56A). 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:1958l-e1962_oil_pump_body_by_pic1_by_oldiron_10.jpg?direct&300|}} {{:techtalk:ih:oil:1958l-e1962_oil_pump_body_by_pic2_by_oldiron_10.jpg?direct&300|}} {{:techtalk:ih:oil:1958l-e1962_oil_pump_body_by_pic3_by_oldiron_10.jpg?direct&300|}} \\

===== L1960-E1962 Version =====
L1960 pump (26203-52D), the retaining ring at the scavenge gear was replaced by the split washer retainer. \\
The scavenge drive gear is counter-bored for the split washer and the return woodruff key is shortened so it won't interfere with the split washer. ((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)) \\
This pump uses the same body as E58-E60 pumps. \\

1961 changes: \\
2 dowels (9095, standard mainshaft roller bearing - .1562" x .615) were added for replacements to the 61-up pump body. \\
A new feed gear solid drive pin (240, actually a hardened needle roller ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/205010-oil-pump-drive-pin#post4623594)) ) used on 1961-1971 breather valve shafts. \\

**L1960-E1962 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Pump Body \\ Dowel (2)|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|
|26203-52D|26215-52|26217-56A|9095|26241-52|26250-56|26318-37|26323-52|26322-52|26320-60|
|Return Gear \\ (idler)|Idler Gear \\ Shaft|Breather \\ Gear|Feed Gear \\ Lock Pin \\ (60-down)|Feed Gear \\ Lock Pin \\ (61-up)|Return Gear \\ Woodruff \\ Key|Breather \\ Shaft \\ Split Washer|Oil Pump \\ Check Ball \\ (no tail)|Oil Pump \\ Check \\ Spring|Oil Pump \\ Switch \\ Nipple|
|26326-52|26327-52|26331-60|603|240|26340-36|26341-37|8866|26364-57|26420-57|
|Oil Pressure \\ Switch - all \\ (ex XLCH)|Oil Switch \\ Nipple Plug \\ (XLCH)|Oil Switch \\ Rubber \\ Boot|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil Pump \\ Seal|  |||
|26551-39B|45830-48|26553-58|26258-52|26259-52|26256-52|26227-58|:::|||

====== L1962-1971 Pumps and Changes ======
  * There are (2 variations) and all these used 14t gears & scavenge sets got taller than the previous 16's were. ((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))
  * All use half moon retainers and the shortened woodruff key on the scavenge drive.
  * All bodies made up to 1966 are for internal feed and scavenge plumbing (plumbing style 1).
    * In 1967, the rear of the body gets tapped for the external feed fitting for use on 1967-1969 XLH. This is when style 2 plumbing started.
    * Bodies tapped for style 2 were still used with the addition of a plug in the new rear hole on 1967-1969 XLCH (style 1 cases).

    * Feed Gears: \\ O.D. (.990") ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626)) \\ Width (.216") ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626))
    * Return Gears: \\ OD (.990") \\  Width: (.375") ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626))
    * Driven Gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))
    * Idler Gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))

===== L1962-1969 Version =====
L1962-1966 XLH and L1962-1969 XLCH pump body (26216-62). \\
Made for feed inlet and return outlet on rear top of right case. \\

In L1963, an oil pressure switch terminal was added for parts replacement and the rubber boot over the switch was deleted. \\
In 1964, the oil pressure switch got a new part number (36551-39C) complete with fittings and a new oil pressure switch nipple (26569-58). \\
The 1967-1969 version was strictly sold for XLCH although the new 67 H pump will work on 67-69 CH models. \\
The XLH case changed in 1967 when they got electric start and the feed fitting is no longer on the XLH case. \\

**L1962-1969 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Pump Body \\ Dowel (2)|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|
|26203-52E|26215-52|26216-62|9095|26241-52|26250-56|26318-37|26323-62|26322-62|26315-62|
|Return Gear \\ (idler)|Idler Gear \\ Shaft|Breather \\ Gear|Feed Gear \\ Lock Pin|Return Gear \\ Woodruff Key|Breather \\ Shaft \\ Split Washer|Oil Pump \\ Check Ball \\ (no tail)|Oil Pump \\ Check \\ Spring|Oil Pump \\ Switch \\ Nipple|Oil Pump \\ Switch \\ Nipple (64)|
|26317-62|26327-52|26331-60|240|26340-36|26341-37|8866|26364-57|26420-57|26569-58|
|Oil Pump \\ Switch - all \\ except XLCH|Oil Pump \\ Switch - all \\ (64)|Oil Switch \\ Nipple Plug \\ (XLCH)|Oil Switch \\ Rubber \\ Boot|Oil \\ Switch \\ Terminal (L63)|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil Pump \\ Seal|  |
|26551-39B|36551-39C|45830-48|26553-58|26560-63|26258-62|26259-62|26256-52|26227-58|:::|

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-1966_xlh_1962l-1969_xlch_oil_pump_body_pic1_by_oldiron_10.jpg?direct&300|}} {{techtalk:ih:oil:1962l-1966_xlh_1962l-1969_xlch_oil_pump_body_pic2_by_oldiron_10.jpg?direct&300|}} {{techtalk:ih:oil:1962l-1966_xlh_1962l-1969_xlch_oil_pump_body_pic3_by_oldiron_10.jpg?direct&300|}} \\

{{techtalk:ih:oil:1962l-1966_xlh_1962l-1969_xlch_oil_pump_body_pic4_by_oldiron_10.jpg?direct&300|}} {{techtalk:ih:oil:1962l-1966_xlh_1962l-1969_xlch_oil_pump_body_pic5_by_oldiron_10.jpg?direct&300|}} {{techtalk:ih:oil:1962l-1966_xlh_1962l-1969_xlch_oil_pump_body_pic6_by_oldiron_10.jpg?direct&300|}} \\

===== 1967-1971 Version =====
1967-1971 XLH, 1970-1971 XLCH body (26216-62A) got a slanted vertical hole drilled through the feed channel to intersect with a horizontal hole drilled through the rear of the pump to redirect incoming oil from the case fitting to now come straight from the oil tank. The rear is threaded 1/8" x 27 NPS (straight pipe thread) for either a NPT (tapered) 3/8" hose nipple to the oil tank or 1/8" pipe plug. The hose nipple was needed for 67-up XLH models due to the feed inlet fitting being deleted on top rear of the case. The pipe plug closes off rear feed intake for use on 67-69 XLCH models with the feed inlet fitting and return outlet on the rear top of the engine case. \\ 

The 1967 pump version (26204-67) was designed for the 67 XLH but could be used on XLCH also with the addition of a plug on the rear of the pump body. \\
With the feed hole in the XLH case now deleted, the original feed hole thru the upper cover is blocked off oon XLH models. \\  
XLCH models can use this pump by removing the hose fitting and installing the pipe plug in the rear of the pump. \\
The original body plug shows up in the 1967 parts supplement catalog as (45831-48) which was replaced in the 1969 parts supplement to (45830-48). \\
From 1970-1971, this pump was sold for both XLH and XLCH. 70-up XLCH deleted the feed fitting on top rear of the case ( pump 26203-52E deleted). \\

**1967-1971 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Pump Body \\ Dowel (2)|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|
|26204-67|26215-52|26216-62A|9095|26241-52|26250-56|26318-37|26323-62|26322-62|26315-62|
|Return Gear \\ (idler)|Idler Gear \\ Shaft|Breather \\ Gear|Feed Gear \\ Lock Pin|Return Gear \\ Woodruff Key|Breather \\ Shaft \\ Split Washer|Oil Pump \\ Check Ball \\ (no tail)|Oil Pump \\ Check \\ Spring|Oil Pump \\ Switch \\ Nipple|Oil Pump \\ Switch - all|
|26317-62|26327-52|26331-60|240|26340-36|26341-37|8866|26364-57|26569-58|36551-39C|
|Oil Switch \\ Nipple Plug \\ (XLCH)|Oil \\ Switch \\ Terminal|Rear Feed \\ Line Fitting \\ (XLH)|Rear Pump \\ Body Plug \\ (XLCH)|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil Pump \\ Seal|  ||
|45830-48|26560-63|63533-41|45830-48|26258-62|26259-62|26256-52|26227-58|:::||

Click on any pic to enlarge: ((photos courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] )) \\
{{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic1_by_shopanucks.jpg?direct&300|}} {{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic2_by_shopanucks.jpg?direct&300|}} {{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic3_by_shopanucks.jpg?direct&300|}} \\

{{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic4_by_shopanucks.jpg?direct&300|}} {{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic5_by_shopanucks.jpg?direct&300|}} {{:techtalk:ih:oil:1967-1971_sportster_oil_pump_pic6_by_shopanucks.jpg?direct&300|}} \\

====== 1972-1976 Pumps and Changes ======
These have (no variations) and go back to 16t gears and a snap ring with long key ((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)) \\
Feed gears are the same as 1957-E1962 but the scavenge set is now wider again (wider than any of the previous sets). \\
Breather gear gets enlarged slots in it. \\
Body and breather housing get an extra hole (2 holes now) drilled in them for additional return capacity, cases also get extra matching hole. ((Dr Dick of the XLFORUM https://www.xlforum.net/showpost.php?p=3272806&postcount=204)) \\
Solid feed gear drive pin gets replaced by the hated roll pin. \\
Dowels between body and breather housing are now history. \\
The pump body got a new casting number suffix (-72). \\
Upper and lower gaskets changed back to their -52 counterparts. \\
L1972 change to oil check spring (26364-72). \\
Pump gears superceded thru the 1975 (-75) parts catalog supplement. \\

  * Feed Gears: \\ O.D. (1.115" OD) ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626)) \\ Width (.185") ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page61#post4364626))
  * Return Gears: \\ O.D. (1.115") \\ Width (.397") ((Dim provided by Kurt Melancon))
  * Driven gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))
  * Idler gear: \\ Center hole I.D. (.422") ((kitabel of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page59#post4359538))
  * Breather timing: 
    * Open 20-25 deg ATDC Front CYL ((thefrenchowl 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?t=989934))
    * Close 85-90 deg ABDC Front CYL ((thefrenchowl 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?t=989934))

**1972-1976 Version Parts List**: \\
^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
|Oil Pump \\ Assembly|Oil Pump \\ Casting#|Oil Pump \\ Body|Upper Cover / \\ Breather Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed Gear \\ (driver)|Feed Gear \\ (idler)|Return Gear \\ (driver)|Return Gear \\ (idler)|
|26204-67A|26215-72|26214-72|26241-52|26250-56|26318-37|26323-52 \\ 26323-52A|26322-52 \\ 26322-52A|26315-72 \\ 26315-72A|26317-72 \\ 26317-72A|
|Idler Gear \\ Shaft|Breather \\ Gear|Feed Gear \\ Roll Pin|Return Gear \\ Woodruff Key|Breather \\ Shaft \\ Retainer Ring|Oil Pump \\ Check Ball \\ (no tail)|Oil Pump \\ Check \\ Spring (E72)|Oil Pump \\ Check \\ Spring (L72)|Oil Pump \\ Switch \\ Nipple|Oil Pump \\ Switch - all|
|26327-52|26331-72|603|26347-15|11002|8866|26364-57|26364-72|26569-58|36551-39C|
|Oil Switch \\ Nipple Plug \\ (XLCH)|Oil \\ Switch \\ Terminal|Oil Switch \\ FM Blade \\ Terminal|Rear Feed \\ Line Fitting \\ (XLH)|Rear Pump \\ Body Plug \\ (XLCH)|Pump \\ Gasket \\ Lower|Pump \\ Gasket \\ Upper|Pump \\ Gasket \\ Mounting|Oil Pump \\ Seal|
|45830-48|26560-63|9914|63533-41|45830-48|26258-52|26259-52|26256-52|26227-58|

1972-1976 pumps have a number stamped on the front nipple (feed side). At this time it's not clear what these numbers indicate. \\
{{techtalk:ih:oil:1972-1976_sportster_oil_pump_nipple_stamping_comp_by_hippysmack.jpg?direct&400|}} ((compilation pics by Hippysmack)) \\

====== Oil Check Ball and Spring ======
See also [[techtalk:ih:oil03g#check_ball_seat_repair|Check ball seat repair]] in the IH Oil Pump section of the Sportsterpedia. \\

The oil pump check ball is in the front of the oil pump. It's a spring and a steel ball set up. \\
The red area in the pic below is the spring & ball sit. \\

Used until mid 1958, the tail of check fits inside the hollow center guide bore of the fitting. ((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-1957-1985/129161-while-waiting-on-the-paint-to-dry-and-we-thought-it-was-the-ballcheck/page2?t=1347614&page=2)) \\
Note that there is no inner face seal surface on the fitting to further isolate the pressure switch port from the 'backside' of the check. \\

Are the early and later switch fittings interchangeable and function exactly the same?
I prefer the bell shape of the early ones.

all ball check (L57-76) fittings are interchangeable.
idk if 52-e57 (plunger check) will interchange.
plunger check fittings are drilled to accept plunger 'tail'.
ball check fittings are not drilled.

-----

Of the 3 pumps, 57-e62, L62-71, and 72-76, two share the same feed gears. The e62< & the 72>. ((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/page22#post3145738)) \\
These two pumps do not share the same check spring. The -72 spring is much stiffer. \\
72 is also the year the 4psi switch came out. Body check seat height remained the same all years. \\
A careful examination reveals the heavier spring can supply a higher pressure to switch by keeping ball seated. \\
When ball is seated, oil flow to motor is SHUT OFF. This last point is sumtin the "stretch the spring" crowd may want to re-read. \\
2psi switch (26551-39c) \\
4psi switch (26552-72) \\
If check closes (stretched spring) at a higher pressure than sender signals at, the lite stays off while flow to motor is stopped. \\
By stretching the 'idiot spring' the 'idiot' may shut off two thing at the same time-- the idiot lite and the flow to motor. \\
 

{{:techtalk:ih:oil:57-76_oil_pump_check_valve_location_by_ironheadjunkie_annotated_by_hippysmack.jpg?direct&300|}} ((photo by ironheadjunkie of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137313-flywheel-plug-oil-pump-check-valve?t=1490437)) \\

{{:techtalk:ih:oil:oil_pump_check_spring_by_dr_dick.jpg?direct&300|}} {{:techtalk:ih:oil:oil_pump_check_ball_57-58_sportster_by_dr_dick.jpg?direct&300|}} \\

There were 3 springs used from 52-76. ((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)) \\
(52-56 also used a second valve- pressure relief). \\

  - 52-E57: (26363-36)
  - L57-E72: (26364-57)
    * Wire length: 1-15/64" ((The Doctor71 of the XLFORUM 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))
    * Wire O.D.: ≈ 0.0250" ((The Doctor71 of the XLFORUM 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))
  - L72-76 (26364-72)
    * Wire length: 1-7/16" ((The Doctor71 of the XLFORUM 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))
    * Wire O.D.: ≈ 0.0250" ((The Doctor71 of the XLFORUM 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))

This is suppose to be a NOS 67 Pump Spring. \\
L = 1.215"
Wire Gauge = .024"
|{{:techtalk:ih:oil:1967_oil_pump_spring_by_monte03.jpg?direct&300|}}|
| 67 oil pump spring. ((photo by Monte03 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/97533-no-oil-to-topend/page3?t=823881&page=3))|

|{{:techtalk:ih:oil:oil_pump_check_spring_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:oil_pump_check_springs_by_fergerburger.jpg?direct&300|}}|{{:techtalk:ih:oil:oil_pump_check_springs_by_the_doctor71.jpg?direct&300|}}|
|  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 ======

|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|}}|

====== Body Covers ======
===== Inner Cover/Breather Housing =====
1972-1976 production K and Sportster models use inner (upper) pump oil pump cover (26241-52). \\
However, there were 3 different versions of this cover and all share the same original part number. The differences in versions are shown below. \\
 
|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|}}|

==== L1962-1971 Inner Cover ====
Part# (26241-52). \\
This version, used on 14T gear pumps, deleted the hole in the cover for the early K model feed bypass. \\
It has the single return oil inlet hole. \\
{{: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|}} \\
===== 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 ======

|Feed Gear Sets((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:feed_gear_sets_by_dr_dick.jpg?direct&300|}}|

|The 4 different scavenge gear sets. \\ Lined up from early in foreground to later in background. \\ This is to show the height progression.((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))|Top view of all 4 sets.((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 the height changes.((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:scavaenge_gear_sets_1_by_dr_dick.jpg?direct&220|}}|{{:techtalk:ih:oil:scavaenge_gear_sets_2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:scavaenge_gear_sets_3_by_dr_dick.jpg?direct&300|}}|

====== 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))|
|{{: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|}}|

====== Breather and Drive Gear Fasteners ======
The various breather gear shafts are machined for the shaft and drive gear fasteners shown below. \\
The roll pin is not bullet proof. It is rare, but they do fail. \\
The solid pin is a bullet proof factory part = good insurance. \\
**Fastener List**: \\
  * 1952-1955 K Model pumps:
    * Used breather gear (26331-52) with a split washer retainer (26341-37) x 2.
    * Both the feed and scavenge drive gears are locked in with a roll pin (603).
  * 1954 KH and 1957-E1960 Sportster pumps:
    * Used breather gear (26331-56) with the retainer "snap" ring (11002).
    * Feed drive gear is locked in with a roll pin (603).
    * Scavenge drive gear is locked in with a standard woodruff key (26347-15).
  * L1960-1971 Sportster pumps:
    * Used breather gear (26331-60) with a split washer retainer (26341-37) x 2. \\ The scavenge drive gear is counter-bored for the split washer (half moons).
    * Feed drive gear is locked in with a solid pin (240).
    * Scavenge drive gear is locked in with a shortened key (26340-36) so it won't interfere with the split washer.
  * 1972-1976 Sportster pumps:
    * Used breather gear (26331-72) which went back to the retainer "snap" ring (11002).
      * Feed drive gear is locked in with a roll pin (603).
      * Scavenge drive gear is locked in with a standard woodruff key (26347-15).

Pin Specs: \\
  * Roll pin (603) is a 3/32" (.09375") x 1/2" roll pin. ((1957 Sportster Parts catlog)) \\
  * Solid pin (240) is a .094" x 1/2" hardened 52100 steel bearing roller. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/175134-couple-of-72-oil-pump-q%60s#post3750288)) \\
 
|More often than not the solid pin was a slipfit in cross hole.((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))|  Here are the 2 pins side by side. ((photo by CanadianTux of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/159403-hardtail-advice-oil-pump-help-71-xlch/page4#post3437461))  |
|{{:techtalk:ih:oil:roll_pin-solid_pin_sets_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:oil:1952-1976_oil_pump_drive_gear_pins_by_canadiantux.jpg?direct&400|}}|


{{:techtalk:ih:oil:1952-1976_breather_gear_fasteners..jpg?direct&600|}} ((pics used with permission, labeled by Hippysmack)) \\

====== Pump to Case Mounting Fasteners ======
1952-E1971 production Model K and Sportster pumps used 1/4"-20 x 1/4"-28 x 2-5/16" studs with lockwashers and nuts. \\
L1971-1976 production Sportster pumps used 1/4"-20 x 2" bolts and lockwashers. \\

{{:techtalk:ref:tools:1952-e1971_k_model_-_sportster_oil_pump_mounting_studs_24819-52_by_robison_motorcycles.jpg?direct&400|}} {{:techtalk:ref:tools:1971l-1976_sportster_oil_pump_bolts_2881w_by_flashback_enterprises_inc.jpg?direct&400|}} \\

\\

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