Differences

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

--- techtalk:ih:susp03d [2022/02/19 08:15]
hippysmack [Outer Bearing Races]
+++ techtalk:ih:susp03d [2024/01/02 03:35] (current)
hippysmack
@@ Line 6: / Line 6: @@
 ===== Parts Orientation and Installation =====
+==== Bearings ====
+-E1974 bearing part# is (47521-52), 2 required. It's a Timken tapered bearing, now obsoleted by HD. \\
+The bearing can still be bought under the manufacturer numbers: Outer race: (17520), Inner race/bearing (17580). \\
+In February of 1974, the MoCo changed to bearing kit (47550-74) and it was supplied through parts order in place of individual bearing (47521-52). \\
+The kit has 2 Timken tapered bearings (47521-74) which are .100" narrower than the original production bearings: Outer Race (11520), Bearing (11590). \\
+See also Service Bulletin No. 688 dated May 12, 1975. \\
+Either bearings can be used but All the parts required for each must be used together to obtain the correct rear fork bearing fit. \\
+The small end of the bearing cone is installed from the inner side of each pivot. \\
+|  Parts for Either Bearing Setup (don't mix them up)  |||
+|  |1957-E1974 Bearing 47521-52|L1974-up Rear Fork Bearing Kit|
+|Pivot Bolt Nut|47512-52|47512-74|
+|Left Bearing Locknut|47514-52|47514-74|
+|Right Bearing Locknut|47515-52|47515-74|
+|Outer Spacer|47517-52|47517-74|
+|Bearing ( 2 used)|47521-52|47521-74|
 ==== Outer Bearing Races ====
 **Orientation**: \\
-There's been a lot of debate on orientation of the bearing races (wide side facing in or out). ((Moon Wolf of the XLFORUM http://xlforum.net/forums/showthread.php?t=563958)) \\
+There's been a lot of debate on orientation of the bearing races (wide side facing in or out). ((Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/78257-swing-arm-bearing-replacement?t=563958)) \\
 Those in the know have agreed the proper way to assemble the bearings is (wide side in as in the pic below). \\
 That puts you installing the bearing cone/inner race from the inner side of each pivot. \\
@@ Line 16: / Line 33: @@
 **Installation**: \\
-The bearing races are not a tight fit in the swing arm when installing them. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=563958)) \\
+The bearing races are not a tight fit in the swing arm when installing them (more of a light interference fit). ((Hopper of the XLFORUM https://www.xlforum.net/forums/showthread.php?t=563958)) \\
 It's all about assembly and loading the bearings. \\
 They need to be able to move when you tighten up the nut on the swing arm pivot to set the preload. \\
@@ Line 30: / Line 47: @@
 |{{:techtalk:ih:susp:1980_swingarm_assy_by_outlawtexan67.jpg?direct&300|}}|
-|  1980 Swingarm bolt assembly ((photo by OutlawTexan67 http://xlforum.net/forums/showthread.php?t=185355))  |
+|  1980 Swingarm bolt assembly ((photo by OutlawTexan67 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/47932-steering-head-swingarm-bearings-and-races?t=185355))  |
 ===== Guide to Swingarm Bearing Replacement  =====
-Article and Pics by ericfreeman of the XLFORUM ((http://xlforum.net/forums/showthread.php?t=709634)) \\ Click on a pic to enlarge:
+Article and Pics by ericfreeman of the XLFORUM ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634)) \\ Click on a pic to enlarge:
-|Here are all the parts laid out as they will fit \\ into the swingarm ((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634)) →|The bearing outer races are already installed \\ in the swingarm ((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|Inspect the swingarm inner surfaces to ensure they \\ are clean. You can see the bearing outer race \\ already installed in the other side. ((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634)) |
+|Here are all the parts laid out as they will fit \\ into the swingarm ((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634)) →|The bearing outer races are already installed \\ in the swingarm ((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|Inspect the swingarm inner surfaces to ensure they \\ are clean. You can see the bearing outer race \\ already installed in the other side. ((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634)) |
 |{{:techtalk:ih:susp:l1000229_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000228_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000230_by_ericfreeman.jpg?direct&300|}}|
-|Use some 800 wet/dry sandpaper to smooth \\ the surface ((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))→|Press the outer races into place using an \\ appropriate tool.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|Grease the tapered roller bearing. I used a very \\ sticky marine grease that won't wash out. It's not \\ for bearings that rotate at high speed like wheel \\ bearings but will be fine for the swingarm that just \\ oscillates through a small arc. ((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|
+|Use some 800 wet/dry sandpaper to smooth \\ the surface ((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))→|Press the outer races into place using an \\ appropriate tool.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|Grease the tapered roller bearing. I used a very \\ sticky marine grease that won't wash out. It's not \\ for bearings that rotate at high speed like wheel \\ bearings but will be fine for the swingarm that just \\ oscillates through a small arc. ((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|
 |{{:techtalk:ih:susp:l1000231_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000232_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000233_by_ericfreeman.jpg?direct&300|}}|
-|Install the bearing in the outer race((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))→|Pack the area around the bearing with more grease \\ and fit the spacer on the bearing, with the smaller \\ diameter section facing up so it will fit into the hole \\ in the dust cover.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|Install the dust seal, ensuring it fits flush with the \\ swingarm boss. The flat side of the spacer should \\ protrude a little through the dust seal hole. This \\ spacer will seat against the frame when the bearing \\ preload is set.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|
+|Install the bearing in the outer race((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))→|Pack the area around the bearing with more grease \\ and fit the spacer on the bearing, with the smaller \\ diameter section facing up so it will fit into the hole \\ in the dust cover.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|Install the dust seal, ensuring it fits flush with the \\ swingarm boss. The flat side of the spacer should \\ protrude a little through the dust seal hole. This \\ spacer will seat against the frame when the bearing \\ preload is set.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|
 |{{:techtalk:ih:susp:l1000234_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000235_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000236_by_ericfreeman.jpg?direct&300|}}|
-|Here's the outer view of the leftside assembly, with \\ the pivot bolt nut and bearing locknut in place. I'll wait \\ to lock the bearing locknut into place until I trial-fit \\ the swingarm to ensure I can properly adjust the left \\ bearing preload.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))→|Repeat the procedure on the other side. Here's \\ what it looks like with both bearings installed.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|This is the entire setup assembled to keep all the \\ parts together prior to fitting the swingarm \\ in the frame.((Pics by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=709634))|
+|Here's the outer view of the leftside assembly, with \\ the pivot bolt nut and bearing locknut in place. I'll wait \\ to lock the bearing locknut into place until I trial-fit \\ the swingarm to ensure I can properly adjust the left \\ bearing preload.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))→|Repeat the procedure on the other side. Here's \\ what it looks like with both bearings installed.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|This is the entire setup assembled to keep all the \\ parts together prior to fitting the swingarm \\ in the frame.((Pics by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/88845-guide-to-swingarm-bearing-replacement?t=709634))|
 |{{:techtalk:ih:susp:l1000237_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000238_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:susp:l1000239_by_ericfreeman.jpg?direct&300|}}|
 ====== Swingarm Installation ======
-  * For the swing arm its pretty easy when you know how it works. The pivot bolt when tightened presses the inner bearing and race,bearing spacer, and dust shield onto both sides of the frame and the actual adjustment is done by tightening bearing locknut on the right side till you have the desired preload once the preload is set then comes the lock-ring so the right bearing locknut cant turn. ((OutlawTexan67 http://xlforum.net/forums/showthread.php?t=185355&page=2))
+  * For the swing arm its pretty easy when you know how it works. The pivot bolt when tightened presses the inner bearing and race,bearing spacer, and dust shield onto both sides of the frame and the actual adjustment is done by tightening bearing locknut on the right side till you have the desired preload once the preload is set then comes the lock-ring so the right bearing locknut cant turn. ((OutlawTexan67 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/47932-steering-head-swingarm-bearings-and-races/page2?t=185355&page=2))
-  * When you install the locknut do not stake it as advised in the FSM. A little [not a lot] of blue locktite is all that it needs, and whoever needs to remove it one day will be thankful. ((IronMick http://xlforum.net/forums/showthread.php?t=1835679&highlight=swingarm))
+  * When you install the locknut do not stake it as advised in the FSM. A little [not a lot] of blue locktite is all that it needs, and whoever needs to remove it one day will be thankful. ((IronMick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/171055-swingarm-bearing-locknuts-competing-philosophies?t=1835679&highlight=swingarm))
   * Factory recommendation from bulletin in 1972: ((HD Service Bulletin #636 (included instruction sheet) dated April 2, 1972))
@@ Line 61: / Line 76: @@
 After tightening the pivot bolt you should be able to obtain resistance by tightening the right side bearing lock nut. \\
-Using a scale, tighten the lock nut to where it has 4-5 lbs resistance. ((http://xlforum.net/forums/showthread.php?t=1725013)) \\
+Using a scale, tighten the lock nut to where it has 4-5 lbs resistance. ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160739-73-sportster-rebuild?t=1725013)) \\
-Comments from Dr Dick ((http://xlforum.net/forums/showthread.php?t=1725013)) \\
+Comments from Dr Dick ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160739-73-sportster-rebuild?t=1725013)) \\
 Why preload? It makes sure the bearings aren't loose. How much preload? Too little makes your bike "flighty". It wont "suretrack". I call it "marshmellow-ish". Too much and you will burn thru bearings at an alarming rate. Where does the preload come from? Swingarm front casting flex. \\
@@ Line 81: / Line 96: @@
 On any arm, the 73< bearing setup will control the arm better for any given preload and will outlast the 74> twice over. \\
 \\

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