Differences

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

--- techtalk:ih:engmech02 [2020/08/25 16:37]
hippysmack [Camshaft Shims]
+++ techtalk:ih:engmech02 [2021/08/07 08:09]
hippysmack
@@ Line 96: / Line 96: @@
 |CAM 3 → ((photo by supr2nr of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions))|CAM 4 → ((photo by supr2nr of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions))|All done. ✔((photo by supr2nr of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions))|
 |{{:techtalk:ih:engmech:installing_76_cams_5_by_supr2nr.jpg?direct&300|}}|{{:techtalk:ih:engmech:installing_76_cams_6_by_supr2nr.jpg?direct&300|}}|{{:techtalk:ih:engmech:installing_76_cams_7_by_supr2nr.jpg?direct&300|}}|
-====== Installing the Pinion Gear ======
-  * From the 79 to 85 FM, there is a timing mark on the pinion shaft and a timing mark on the pinion gear. These must line up. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions&page=3))
-|{{:techtalk:ih:engmech:pinionshafttimemark_by_ironmick.jpg?direct&200|}}|
-|Pinion Shaft Timing Mark ((photo by IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions&page=3))|
 ====== Camshaft Shims ======
@@ Line 113: / Line 106: @@
 ===== Sub-Documents =====
 * . . . [[techtalk:ih:engmech02a|Gearcase Cover Removal]]
@@ Line 126: / Line 118: @@
     - Old style gearcase covers (XLH 25227-81) and (XLS 25229-81) have a rubber plug on the lower left.
     - New style gearcase covers (XLH 25208-81) and (XLS 25209-81) replaced the rubber plug with a hex capscrew and also contains the extra mounting hole (top left).
 ====== Pinion Gear ======
+\\
 **Compatibility**
+-1985 pinion gears have 18 teeth and splines to match the splined pinion shaft. \\
+-1976 pinion gears have 4 splines. \\
+-1985 pinion gears have 6 splines. \\
 |Part#|Year Models|
@@ Line 143: / Line 138: @@
 |24061-74 (black)|:::|
+**The 57-76 pinion gear needs to be a tight fit**. However, it's a common problem to find them loose on a used engine. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1072235)) \\
+The trick in selecting the right fit part during assembly. The gear is supposed to be "size for size" with the major diameter of the shaft splines. \\
+The press actually is between the sides of 1 male shaft spline and it's matching female in gear. \\
+There is 1 bigger spline so the gear can index for cam timing. The press spline is the one opposite the bigger one. \\
+The bad news is the shaft wears before the gear. The XL gear is beefier where the pump drive gear hits the back of the pinion gear. \\
+It's beefier because HD also had these failures. \\
+However, leaving the gear loose makes you 1 of 80% of Ironhead riders. Worse side effect is non stop "tappet noise". It can be heard even just pushing the motor over with kicker. \\
+It's usually not "destructive" problem to leave it as is and you can't use an adhesive to "glue" the pinion gear on. \\
+The 79-85 pinion gear slides up on a timing mark on the pinion shaft and corresponding to a timing mark on the pinion gear. These must line up. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions&page=3))
+Click on any pic below to enlarge: \\
+|  1957-1976 Pinion Gear. ((photo courtesy of Ebay seller, Evil Genius M/C Parts. [[https://www.ebay.com/str/evilgeniusmcparts?_trksid=p2047675.l2563|Link to Ebay Store]] ))  ||
+|{{:techtalk:ih:engmech:pinion_gear_pic2_24011-37_by_evilgeniushd1936.jpg?direct&300|}}|{{:techtalk:ih:engmech:pinion_gear_pic1_24011-37_by_evilgeniushd1936.jpg?direct&300|}}|
+|1977-1985 Pinion Shaft Timing Mark ((photo by IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=239641&highlight=cam+positions&page=3))|
+|{{:techtalk:ih:engmech:pinionshafttimemark_by_ironmick.jpg?direct&200|}}|
+|  1977-1985 Pinion Gear (24057-74) ((photos courtesy of Ebay seller, Robison Motorcycles [[https://www.ebay.com/str/robisonmotorcycles?_trksid=p2047675.l2563|Link to Ebay Store]] ))  ||  1977-1985 Pinion Gear (24056-74) App. Dims ((photos courtesy of Ebay seller, Robison Motorcycles [[https://www.ebay.com/str/robisonmotorcycles?_trksid=p2047675.l2563|Link to Ebay Store]] ))  |
+|{{:techtalk:ih:engmech:pinion_gear_24057-74_pic2_by_robisonmotorcycles.jpg?direct&300|}}|{{:techtalk:ih:engmech:pinion_gear_24057-74_pic1_by_robisonmotorcycles.jpg?direct&300|}}|{{:techtalk:ih:engmech:pinion_gear_24056-74_app_dims_by_robison_motorcycles.jpg?direct&300|}}|
 ====== Tappets (Lifters) ======

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