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techtalk:ih:engmech02 [2021/06/13 04:59] hippysmack [Pinion Gear] |
techtalk:ih:engmech02 [2021/08/07 08:09] hippysmack |
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|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))| | |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|}}| | |{{: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|}}| | ||
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- | ====== Installing the Pinion Gear ====== | ||
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- | * 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)) | ||
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- | |{{: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 ====== | ====== Camshaft Shims ====== | ||
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===== Sub-Documents ===== | ===== Sub-Documents ===== | ||
* . . . [[techtalk:ih:engmech02a|Gearcase Cover Removal]] | * . . . [[techtalk:ih:engmech02a|Gearcase Cover Removal]] | ||
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- Old style gearcase covers (XLH 25227-81) and (XLS 25229-81) have a rubber plug on the lower left. | - 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). | - 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). | ||
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====== Pinion Gear ====== | ====== Pinion Gear ====== | ||
- | Click on any pic below to enlarge: \\ | ||
- | \\ | ||
+ | \\ | ||
**Compatibility** | **Compatibility** | ||
+ | 1957-1985 pinion gears have 18 teeth and splines to match the splined pinion shaft. \\ | ||
+ | 1957-1976 pinion gears have 4 splines. \\ | ||
+ | 1977-1985 pinion gears have 6 splines. \\ | ||
+ | |||
|Part#|Year Models| | |Part#|Year Models| | ||
|24011-37|1954-1976 KH / XL / XLH / XLCH| | |24011-37|1954-1976 KH / XL / XLH / XLCH| | ||
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|24061-74 (black)|:::| | |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]] )) || | | 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|}}| | |{{: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]] )) | | | 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]] )) | |