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techtalk:ih:oil03x [2024/09/15 01:24] – [1958-1969 KR, KRTT, KHRTT, XLRTT Pump] hippysmacktechtalk:ih:oil03x [2025/08/26 02:45] (current) – [1952-1955 production K Models and 1952-1957 Competition KR, KRTT and KHRTT] hippysmack
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 ====== IH: Oiling & Lubrication - Sub-03X ====== ====== IH: Oiling & Lubrication - Sub-03X ======
-====== 1952-1966 Production K-Model Oil Pumps - Parts Lists and Information ======+====== 1952-1956 Production K-Model Oil Pumps - Parts Lists and Information ======
 \\ \\
 ===== 1952-1954 K/KK/KH Model Pump ===== ===== 1952-1954 K/KK/KH Model Pump =====
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 The 1955 pump is the same as the 52-54 pump with the exception of blocking off the feed oil pressure bypass with a removable ball and set screw. \\ The 1955 pump is the same as the 52-54 pump with the exception of blocking off the feed oil pressure bypass with a removable ball and set screw. \\
 It has the same pump body machining and gears including no oil seal between the feed and return gears. \\ It has the same pump body machining and gears including no oil seal between the feed and return gears. \\
-An acorn nut locked the set screw in place instead of the original threaded plug. \\+A 1/2"-20 x 3/4" acorn nut locked the 1/2"-20 set screw in place instead of the original threaded plug. \\
 The (-A) assembly revision was designated for 1955 KH models. \\ The (-A) assembly revision was designated for 1955 KH models. \\
 Although the ball and set screw could be replaced instead with the spring and tail ball for use with previous models. \\ Although the ball and set screw could be replaced instead with the spring and tail ball for use with previous models. \\
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 |26258-52|26259-52|26256-52|:::||||||| |26258-52|26259-52|26256-52|:::|||||||
  
-Click on pic to enlarge: \\+Click on any pic to enlarge: \\
  
 {{:techtalk:ih:oil:1956_standard_kh_model_oil_pump_oiling_paths_by_hawghd1_edited_by_hippysmack.jpg?direct&500|}} ((photo by hawghd1, edited by Hippysmack)) \\ {{:techtalk:ih:oil:1956_standard_kh_model_oil_pump_oiling_paths_by_hawghd1_edited_by_hippysmack.jpg?direct&500|}} ((photo by hawghd1, edited by Hippysmack)) \\
  
-====== 1952-1966 Competition Oil Pumps - Parts Lists and Information ======+{{: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|}} \\ 
 + 
 + 
 +====== 1952-1969 Competition Oil Pumps - Parts Lists and Information ======
 ===== 1952-1955 KR, KRTT, KHRTT Pump ===== ===== 1952-1955 KR, KRTT, KHRTT Pump =====
   * Pump Speed is 1/4 of the engine RPM.   * Pump Speed is 1/4 of the engine RPM.
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 Special thanks to the The French Owl for providing period specific parts catalogs. \\ Special thanks to the The French Owl for providing period specific parts catalogs. \\
-Parts List:((1954 KR, KRTT, KHRTT Parts Catalog)) ((1956 KR, KRTT, KHRTT Parts Catalog)) ((1957 KR, KRTT, KHRTT Parts Catalog)) \\+Parts List:((1954 KR, KRTT, KHRTT Parts Catalog)) ((1956 KR, KRTT, KHRTT Parts Catalog)) ((1957 KR, KRTT, KHRTT Parts Catalog)) ((1959 KR, KRTT, KHRTT Parts Catalog)) \\
 ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}|||||||||| ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
- 
 |Oil Pump \\ Assembly|Oil Pump \\ Body|Upper Cover \\ Breather Tower \\ (52-53)|Upper Cover \\ Breather Tower \\ (54-56)|Lower Cover \\ Plate|Oil Pump \\ Drive Gear \\ (52-53)|Oil Pump \\ Drive Gear \\ (54-55)|Feed \\ Gear \\ (driver)|Feed \\ Gear \\ (idler)|Return \\ Gear \\ (driver)| |Oil Pump \\ Assembly|Oil Pump \\ Body|Upper Cover \\ Breather Tower \\ (52-53)|Upper Cover \\ Breather Tower \\ (54-56)|Lower Cover \\ Plate|Oil Pump \\ Drive Gear \\ (52-53)|Oil Pump \\ Drive Gear \\ (54-55)|Feed \\ Gear \\ (driver)|Feed \\ Gear \\ (idler)|Return \\ Gear \\ (driver)|
 |26203-54R|26217-52|26241-52|26241-54R|26250-52|26318-37|26318-54R|26323-52|26322-52|26320-52| |26203-54R|26217-52|26241-52|26241-54R|26250-52|26318-37|26318-54R|26323-52|26322-52|26320-52|
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 Special thanks to the The French Owl for providing period specific part catalogs. \\ Special thanks to the The French Owl for providing period specific part catalogs. \\
-Parts List:((1970 XR-750 Parts Catalog)) ((1958-1968 Competition Sportster XLRTT and KR-KRTT Models)) \\+Parts List: ((1956 KR, KRTT, KHRTT Parts Catalog)) ((1957 KR, KRTT, KHRTT Parts Catalog)) ((1959 KR, KRTT, KHRTT Parts Catalog)) \\
 ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}|||||||||| ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
 |Oil Pump \\ Assembly|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)|Idler Gear \\ Shaft| |Oil Pump \\ Assembly|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)|Idler Gear \\ Shaft|
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 Special thanks to the The French Owl for providing period specific part catalogs. \\ Special thanks to the The French Owl for providing period specific part catalogs. \\
-Parts List:((1970 XR-750 Parts Catalog)) ((1958-1968 Competition Sportster XLRTT and KR-KRTT Models)) \\+Parts List: ((1959 KR Parts Catalog)) ((1965 KR Parts Catalog)) ((1968 KR Parts Catalog)) ((1970 XR-750 Parts Catalog)) ((1958-1968 Competition Sportster XLRTT and KR-KRTT Models)) \\
 ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}|||||||||| ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&830|}}||||||||||
 |Oil Pump \\ Assembly|Oil Pump \\ Body|Upper Cover \\ Breather \\ Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed \\ Gear \\ (driver)|Feed \\ Gear \\ (idler)|Return \\ Gear \\ (driver) \\ (58-64)|Return \\ Gear \\ (driver) \\ (65-69)|Return \\ Gear \\ (idler)| |Oil Pump \\ Assembly|Oil Pump \\ Body|Upper Cover \\ Breather \\ Tower|Lower Cover \\ Plate|Oil Pump \\ Drive Gear|Feed \\ Gear \\ (driver)|Feed \\ Gear \\ (idler)|Return \\ Gear \\ (driver) \\ (58-64)|Return \\ Gear \\ (driver) \\ (65-69)|Return \\ Gear \\ (idler)|
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 |8866|26374-53R|26423-52R|26258-52|26259-52|26256-52|:::|||| |8866|26374-53R|26423-52R|26258-52|26259-52|26256-52|:::||||
  
-|  1958-1970 KR-750, KRTT, KHRTT, XR-750, XLR-900, XLRTT ((pics courtesy of Robert Evans))  ||| +Pics: click on any pic to enlarge. ((photos courtesy of Robert Evans)) \\ 
-|{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic1_by_robert_evans.jpg?direct&300|}}|{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic2_by_robert_evans.jpg?direct&300|}}|{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic3_by_robert_evans.jpg?direct&300|}}|+ 
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic1_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic2_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic3_by_robert_evans.jpg?direct&300|}} \\ 
 + 
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic4_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic5_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic6_by_robert_evans.jpg?direct&300|}} \\ 
 + 
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic7_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic8_by_robert_evans.jpg?direct&300|}}  
 +{{:techtalk:ih:oil:1970_xr-750_oil_pump_26203-54ra_pic9_by_robert_evans.jpg?direct&300|}} \\
  
 ======= Feed Bypass Systems ======= ======= Feed Bypass Systems =======
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 **How it's plumbed**: \\ **How it's plumbed**: \\
-  * The pump body has a vertical (bypass) hole drilled half thru it at app 11:00 from the rear outer mounting bolt looking at the feed side. A horizontal hole is drilled from the rear of the pump thru the bypass hole and to the normal feed output side of the pump. The horizontal hole is counter drilled in the rear for a ball stop near the vertical bypass hole. A spring and plug on the rear of the pump keeps the ball pressed against it's seat, closing off the vertical hole with spring pressure. The breather tower plate and the right case both have a corresponding hole drilled through where oil can rise from the pump into the cam chest. The lower pump cover blocks off the bypass hole on the bottom of the pump. \\+  * The pump body has a vertical (bypass) hole drilled half thru it at app 11:00 from the rear outer mounting bolt looking at the feed side. A horizontal hole is drilled from the rear of the pump thru the bypass hole and to the normal feed output side of the pump. The horizontal hole is counter drilled in the rear for a ball stop near the vertical bypass hole. A spring and plug on the rear of the pump keeps the ball pressed against it's seat, closing off the vertical hole with spring pressure. The breather tower plate and the right case both have a corresponding hole drilled through where oil can rise from the pump into the cam chest. \\
  
 **How it works**: \\ **How it works**: \\
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 **Rendering the bypass inoperable** on competition model pumps: \\ **Rendering the bypass inoperable** on competition model pumps: \\
 Since these pumps are for competition only, it is counter productive to block the bypass system. Since these pumps are for competition only, it is counter productive to block the bypass system.
 +
 +Bypass oil path from oil pump to cam chest. ((photos courtesy of Ebay seller, oldiron_10, edited by Hippysmack [[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:1952_k_model_case_-_feed_oil_bypass_by_oldiron.jpg?direct&400|}}
 ===== 1958-1969 KR, KRTT, KHRTT, XLR, XLRTT and 1970 Iron XR-750 Pump ===== ===== 1958-1969 KR, KRTT, KHRTT, XLR, XLRTT and 1970 Iron XR-750 Pump =====
 All these models use oil pump body (26217-58R) which is machined with an internal feed bypass system to lower oil flow to the motor. \\ All these models use oil pump body (26217-58R) which is machined with an internal feed bypass system to lower oil flow to the motor. \\
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 +{{:techtalk:ih:oil:1958-1971_kr-750_krtt_xlr_xr-750_xlrtt_oiling_paths_by_hawghd1.jpg?direct&400|}} \\
  
 \\ \\
  
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