techtalk:ih:oil05 - Sportsterpedia

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
[[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
====== IH: Oiling & Lubrication ======
====== Engine Oil Routes ======

====== Right Crankcase Feed Galley ======

====== Top End Oiling ======

===== Rocker Arm / Valve Oiling =====

|  Rocker arm shaft. ((photo by jmmarks70 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1774605))  |  Oil flow. ((photo by jmmarks70 of the XLFORUM - annotated by Hippysmack http://xlforum.net/forums/showthread.php?t=1774605))  |  Exhaust valve squirter. ((photo by jmmarks70 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1774605))  |
|{{:techtalk:ih:oil:rocker_arm_shaft_1_by_jmmarks70.jpg?direct&300|}}|{{:techtalk:ih:oil:rocker_arm_shaft_2_by_jmmarks70.jpg?direct&300|}}|{{:techtalk:ih:oil:exhaust_rocker_arm_by_jmmarks70.jpg?direct&300|}}|
===== Rocker Box Oiling =====
Oil travels in a passage between the two rocker arm shafts (big end). \\
The oil line comes from underneath into one shaft bore on the pushrod side in each rocker box. \\
There is a rifle drilled hole between the rocker arm shafts in each box that connects the two for oil passage. \\
Each hole is plugged off on the outside of the box. \\

|  Front rocker box oiling.  |
|{{:techtalk:ih:oil:71-85_rocker_box_oiling_by_sc72.jpg?direct&250|}}|

|  Rocker Boxes on 69 model. ((photos by Arcturus of the XLFORUM http://xlforum.net/forums/showthread.php?t=1304674&page=11))  ||
|{{:techtalk:ih:oil:69_rocker_boxes_1_by_arcturus.jpg?direct&300|}}|{{:techtalk:ih:oil:69_rocker_boxes_2_by_arcturus.jpg?direct&300|}}|
====== Bottom End Oiling ======

===== Pinion shaft and Crank Pin =====

===== Cam Cover Bushings =====
===== Cam Cover \ Gasket =====
====== Case Oiling and Drainage ======

|  73-Up right case half ((photo by ironheadjunkie of the XLFORUM http://xlforum.net/forums/showthread.php?t=1421916&page=2))  |
|{{:techtalk:ih:engmech:right_case_half_24559-73_by_ironheadjunkie.jpg?direct&300|}}|

===== Splash =====
===== Oil Pump Scavenge =====
See also the [[techtalk:ih:oil03|IH Oil Pump]] section of the Sportsterpedia. \\
==== '57-'76 Cases ====

An engine sitting for a while not running can "sit-sump" oil into the primary. \\
On engine start up the excess oil in the primary should be transferred back into the engine (but not all at once). \\
In the event oil from the oil pump seeps into the crankcase high enough to spill over into the primary, on startup, that oil is sent into the crankcase by way of the transfer valve. \\
On piston downstroke, positive crankcase pressure closes the transfer valve and seals a small hole preventing flow into the primary. \\
On piston upstroke, vacuum in the crankcase opens the transfer valve and sends a burst of oil/air into the crankcase. \\
Read more about the [[techtalk:ih:oil01#transfer_valve_76_and_earlier|Transfer Valve]] in the Sportsterpedia. \\

The pics below show the flow from the flywheel cavity to the return pump. \\
In stock configuration, most all used oil ends up in the flywheel cavity. \\
The small amount that gets supplied to the upper pushrod ball/socket goes into the gearcase. \\
While the splash oil to the exhaust valves enters the crankcase through the head drains. \\ 

The two crankcase halves together form the oil scavenging slot where oil is sent out of the sump to the oil pump. \\
The open slot receives oil by splash from the wheels and oil is forced into and thru the slot by way of positive crankcase pressure (downstroke of the pistons). \\
The scavenge slot is blocked off on the left side by the crankcase wall. \\
 
{{:techtalk:ih:engmech:cc_flow_1_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=3)) {{:techtalk:ih:oil:transfer_valve_explained_5_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showpost.php?p=3886388&postcount=40)) {{:techtalk:ih:oil:transfer_valve_2_by_ironheadjunkie.jpg?direct&300|}} ((photo by ironheadjunkie http://xlforum.net/forums/showthread.php?t=1495746)) \\

Oil is pushed by the pistons thru the slot into the right case where it gathers in the oil trap at the oil pump mount. \\

{{:techtalk:ih:engmech:cc_flow_7_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=3)) {{:techtalk:ih:oil:oil_trap_in_right_case_2_by_the_frenchowl.jpg?direct&300|}} ((photo by thefrenchowl of the XLFORUM http://xlforum.net/forums/showthread.php?p=5834856#post5834856)) \\

Oil is picked up through the windows in the breather gear and slung into the gearcase and drained thru a strainer into the oil pump scavenge gears and sent back to the oil tank. \\ 

{{:techtalk:ih:engmech:cc_flow_6_by_dr_dick.jpg?direct&300|}}  ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=3)) {{:techtalk:ih:engmech:cc_flow_8_by_dr_dick.jpg?direct&300|}}  ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=3)) \\
==== '77 and Later Cases ====
The "drain plug" on the bottom of the case is simply a threaded plug that caps the oil scavenging passageway. ((bobbystat of the XLFORUM http://xlforum.net/forums/showthread.php?t=1950691)) \\
The MoCo drilled from the bottom of the case to the horizontal oil passage in the gearcase. \\
This connects the crankcase sump oil to the scavenge port of the oil pump and the hole is plugged on the bottom. \\

From inside the case with the plug removed from the scavenge passage; \\
In the second pic below, you can see that the threads, from the tap, have been machined farther up into this hole. \\
This is the oil passage from the sump to the scavenge pump. \\
Oil from cylinder drains, crankpin, pushrods and cam chest that collects in the sump is fed to the pump by crankcase pressure and pump suction through this hole. \\

|  Scavenge passage on 77 engines  ((photos by bobbystat of the XLFORUM http://xlforum.net/forums/showthread.php?t=1950691))  |||
|{{techtalk:ih:oil:1977_case_drain_plug_1_by_bobbystat.jpg?direct&300|}}|{{techtalk:ih:oil:1977_case_drain_plug_2_by_bobbystat.jpg?direct&300|}}|{{:techtalk:ih:oil:77_and_up_case_scavenging_by_bobbystat.jpg?direct&300|}}|


===== Gravity =====




\\


[[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]]
Trace: • IH: Carburetor, Intake Manifold & Exhaust - Sub-01Q • IH: Engine Mechanicals - Sub-04A • REF: Oiling & Lubrication • REF: Tools & Fasteners • REF: Oiling & Lubrication • W E L C O M E !