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techtalk:ref:svcproc9l [2024/04/30 20:36] hippysmack [Carrier 2] |
techtalk:ref:svcproc9l [2024/05/01 17:28] (current) hippysmack |
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| - | ====== REF: Service Procedures 9G ====== | + | ====== REF: Service Procedures 9I ====== |
| \\ | \\ | ||
| ====== How to Blueprint Your Shifter ====== | ====== How to Blueprint Your Shifter ====== | ||
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| ====== Carriers ====== | ====== Carriers ====== | ||
| ===== Carrier 1 ===== | ===== Carrier 1 ===== | ||
| + | There are 4 different versions of OEM "pawl carriers" and 5 OEM versions of the "pawl carrier support" (I call this part "shift tower"). ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/125248-about-the-trans/page2?postcount=27#post2633705)) \\ | ||
| This is the 1952-1953 carrier. \\ | This is the 1952-1953 carrier. \\ | ||
| The thin area renders these unsuitable for 54> cases. The 1952-1953 cases used a bolt in stop (34625-52 in 1st post) that limited shifter shaft rotation. In 1954, that part was dropped and carrier rotation stop was moved to contact between carrier and retractors. In 1966, this was beefed up. More on that to come. \\ | The thin area renders these unsuitable for 54> cases. The 1952-1953 cases used a bolt in stop (34625-52 in 1st post) that limited shifter shaft rotation. In 1954, that part was dropped and carrier rotation stop was moved to contact between carrier and retractors. In 1966, this was beefed up. More on that to come. \\ | ||
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| There are no shortcuts to blueprinting. That's why most guys don't undertake it. Out of the box the trock tower may be worse than the factory units. When blueprinted, it's way better than anything else. | There are no shortcuts to blueprinting. That's why most guys don't undertake it. Out of the box the trock tower may be worse than the factory units. When blueprinted, it's way better than anything else. | ||
| + | What you need is a 1966-1971 tower to salvage the retractors from. On 77-up, you can use the 65< units also. 77> don't have as much peg throw as 76< did. The long peg throw of the earlier bikes applies more leverage to the carrier stops. | ||
| + | They need the 66> where the 77> bikes work fine with either. Finding cracked towers at an indy will get you what you need for cheap. You're lookin for the tower on the left. They crack at the red line. \\ | ||
| + | {{:techtalk:ref:svcproc:htbs_1971_vs_1972_towers_1_by_dr_dick.jpg?direct&600|}} \\ | ||
| + | \\ | ||
| + | {{:techtalk:ref:svcproc:htbs_1971_vs_1972_towers_2_by_dr_dick.jpg?direct&600|}} | ||
| + | |||
| + | **Questions**: \\ | ||
| + | * doodah man: Is setting the "retractor" arm pins a straight forward installation? or is there some trickery to it | ||
| + | * Dr Dick: In order to replace the arms you grind/drill off the rivet heads, then drive the arms off. This leaves the rivet shanks in the tower. The shanks are a press fit into tower. That's important. \\ So, you need new rivets with good tight fit to tower and to arms. If there is any sloppy rivet diameters, the arms will move in operation. Finding a good used tower with hard arms is usually a better option than transplanting them. | ||
| + | * buskit: Does my trock tower use rivets? Or are they "built in"? Meaning you pean over the nubs cast into the piece? | ||
| + | * Dr Dick: The rivets are actually precision pins that you peen both ends. There is no rivet head. Rivet was a terrible choice of word on my part. These pins are already installed in the trock tower. | ||
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| + | Here is the 1977-1985 tower. Changed for clearance of the 1977 up shifter shaft that came in from the left. \\ | ||
| + | {{:techtalk:ref:svcproc:htbs_1977-1985_shift_tower_by_dr_dick.jpg?direct&600|}} \\ | ||
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| + | And here is the old trock cast iron tower, by far the best shift fork control and never breaks. Best of both worlds. \\ | ||
| + | {{:techtalk:ref:svcproc:htbs_trock_cast_iron_tower_by_dr_dick.jpg?direct&600|}} \\ | ||
| ====== Shift Shaft ====== | ====== Shift Shaft ====== | ||
| To this point, we have talked about each part (with the exception of the centering springs and the tower) and how it interacts with its mates. It's time to carry this a bit farther from the workbench. \\ | To this point, we have talked about each part (with the exception of the centering springs and the tower) and how it interacts with its mates. It's time to carry this a bit farther from the workbench. \\ | ||
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| Next, we tackle carrier centering, pawling bias, and cam plate slot registration. \\ | Next, we tackle carrier centering, pawling bias, and cam plate slot registration. \\ | ||
| + | |||
| + | **Question**: \\ | ||
| + | * megavites: What tranny issue might cause the shift arm to occasionally spin the shaft without actually clicking into the next gear. It also occasionally binds. I'm pretty sure the shifter is not spinning on the shaft and I'm wondering if this is an easy fix or leading me down the road to a tranny overhaul on my 73 XLCH. | ||
| + | * Dr Dick: I'll bet you have the most common shifter problem. Go to 1st post and see item 1). See that pin (used on 73>)? I'll bet yours is sheared. As a cure guys will weld the head to the shaft (I do it) and the weld will break if the weld isn't prepped well. I'll bet one of those two scenarios is at hand for you. \\ {{:techtalk:ref:svcproc:htbs_shift_shaft_pin_1973_up_by_dr_dick.jpg?direct&600|}} | ||
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| [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | ||
