Differences

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--- techtalk:evo:engmech02 [2022/09/07 19:00]
hippysmack [Cam Gear Changes]
+++ techtalk:evo:engmech02 [2023/08/13 02:08]
ixl2relax [Sub Documents]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== EVO: Engine Mechanicals ======
@@ Line 12: / Line 14: @@
 ====== Camshafts ======
+The cams get oiled by drainage from the rocker boxes and splash oil in the bottom end. \\
+Oil flows off the pushrod side of the rocker boxes through the pushrod covers, into vertical holes in the lifter bores and into the gearcase. \\
+Oil falls on the cam lobes on the way down this hole. Some of this oil is transferred between the gear teeth. \\
+The rear intake (#2) cam gets a little oil spray from the right case oil feed galley through the small orifice underneath the open cavity in the case. \\
+That oil is transferred between the teeth of the cams. \\
+Oil flung off the cams lands in the gearcase to be collected into the scavenge (return) side of the oil pump. \\
+-up Cam Gear Oiler Hole in the Right Case. \\
+Below are pics of the restricted orifice underneath the oil feed galley in the case that shoots a small stream onto #2 cam. \\
+#2 cam rotates counterclockwise and the oil is sprayed on the right side of the cam gear for extra cooling (transferred to all cams).
+|  (L) 92-99 ((photo by Hippysmack of the XLFORUM)), (R) 2000 Up ((photo by Bruce of the XLFORUM http://xlforum.net/forums/showthread.php?t=1118529&page=2up)) cam oiling hole from the feed galley  ||
+| {{:techtalk:evo:oil:92-99_cam_oiler_hole_by_hippysmack.jpg?direct&300|}} |{{:techtalk:evo:oil:2000_up_cam_oiler_hole_by_bruce.jpg?direct&300|}}|
 ===== Cam Specs - OEM & SE =====
@@ Line 64: / Line 80: @@
 ===== Removing / Installing Evo Cams =====
-===== Sub Documents =====
+==== Sub Documents ====
   * [[techtalk:evo:engmech02a|Installing Evo Cams (91 and Up)]]
@@ Line 122: / Line 138: @@
 ===== Cam Bushings =====
-  * The cam bushings get their oil from the fling off of the cam gears and drain back from the top end down the pushrod tubes that puddles in at depressions in the castings where the cam bushing slots are aligned. So basically they are drip fed. Also the cam bushings on the case side are open to the crank behind them, and probably get splash there too. ((Wedge of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=3))
+==== Inner Bushings ====
+  * These bushings get their oil from the fling off of the cam gears and drain back from the top end down the pushrod tubes that puddles in at depressions in the castings where the cam bushing slots are aligned. So basically they are drip fed. Also the cam bushings on the case side are open to the crank behind them, and probably get splash there too. ((Wedge of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=3))
   * Worn bushings can cause excess backlash. ((1986 HD Dealer Sportster FSM pg 3-45))
 |{{:techtalk:evo:engmech:2010_1200x_cam_inner_bushings_by_lostndallas.jpg?direct&400|}}|{{:techtalk:evo:engmech:2010_1200x_cam_cover_bushings_by_lostndallas.jpg?direct&400|}}|
 |  2010 1200X Inner Cam Bushings (broken teeth on oil pump gear) ((photo by lostNdallas of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=6))  |  2010 1200X Cam Cover and Bushings ((photo by lostNdallas of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=4))  |
+==== Outer Bushings ====
+These bushings are fed from splash oil into channeled holes drilled behind the bushing faces. \\
+#1, #3 and #4 cam bores have channels drilled from the top down into the back side of the bores. \\
+The channel for #2 cam bore starts at the bottom and is drilled into the back side of the bore. \\
+The pinion bushing (as well as the hole in the pinion shaft) is fed from a cross drilled hole in the top of the cover. \\
+|{{:techtalk:evo:oil:cam_bushing_oiling_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_3_by_hippysmack.jpg?direct&300|}}|
+|{{:techtalk:evo:oil:pinion_bushing-shaft_oiling_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_4_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_5_by_hippysmack.jpg?direct&300|}}|
+|{{:techtalk:evo:oil:cam_bushing_oiling_6_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_7_by_hippysmack.jpg?direct&300|}}|
 ====== Lifters (tappets) ======
-===== Sub-Documents =====
+==== Sub-Documents ====
   * [[techtalk:evo:engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]]
   * [[techtalk:evo:engmech02c|Hydraulic Lifter - Mechanical and Hydraulic Operation]]
+  * [[techtalk:evo:engmech02d|Why 1986-up Lifters Clack on Initial Startup]]
 See also in the Sportsterpedia; \\

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