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techtalk:ref:genmsr07 [2024/01/17 21:26] hippysmack |
techtalk:ref:genmsr07 [2024/01/17 23:02] (current) hippysmack |
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| * Inspect and mic everything as you tear it down as well as during the install. | * Inspect and mic everything as you tear it down as well as during the install. | ||
| * Take pictures of everything (outside and inside before you remove anything, during and after). \\ After you have the entire engine spread out in pieces is the last time to wonder if you had a pinched oil line since you can't prove it then. | * Take pictures of everything (outside and inside before you remove anything, during and after). \\ After you have the entire engine spread out in pieces is the last time to wonder if you had a pinched oil line since you can't prove it then. | ||
| - | * Work backwards from the order of installation when removing anything. Just crack them loose in reverse order, then back them off in reverse order. ((wedge of the XLFORUM http://xlforum.net/forums/showthread.php?t=1756724&page=30)) | + | * Work backwards from the order of installation when removing anything. Just crack them loose in reverse order, then back them off in reverse order. ((wedge of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/163447-spun-2-outer-bushing-again/page30?t=1756724&page=30)) |
| Try and take pics, just for you, (although we'd like to see them too) before, during and after teardown. | Try and take pics, just for you, (although we'd like to see them too) before, during and after teardown. | ||
| Line 44: | Line 44: | ||
| * **Installing Cam Cover**: | * **Installing Cam Cover**: | ||
| * Improper alignment of the cam cover and / or bushings in the cover can angle the camshaft against the bushings in both the cover and the case side. \\ This can insure metal to metal contact and bring the heat. | * Improper alignment of the cam cover and / or bushings in the cover can angle the camshaft against the bushings in both the cover and the case side. \\ This can insure metal to metal contact and bring the heat. | ||
| - | * Torqueing the cover bolts out of sequence can move the location of the bushings enough to cause the cams to bind. \\ The fit of the cams is critical and highly sensitive to the correct torque sequence). ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1756724&page=22)) Things don't have to be off by much to cause a problem. | + | * Torqueing the cover bolts out of sequence can move the location of the bushings enough to cause the cams to bind. \\ The fit of the cams is critical and highly sensitive to the correct torque sequence). ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/163447-spun-2-outer-bushing-again/page22?t=1756724&page=22)) Things don't have to be off by much to cause a problem. |
| - | * Cutting down the cam cover can warp it causing the cover to bind the cams (especially if you've cut out one of the locating dowels) ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1756724&page=22)) \\ People general don't appreciate how precise the fit is and needs to be between the cam gears. | + | * Cutting down the cam cover can warp it causing the cover to bind the cams (especially if you've cut out one of the locating dowels) ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/163447-spun-2-outer-bushing-again/page22?t=1756724&page=22)) \\ People general don't appreciate how precise the fit is and needs to be between the cam gears. |
| * **Installing Heads / Valves**: | * **Installing Heads / Valves**: | ||
| * Excessive valve spring pressure can force too much pressure back down against the spinning cams and cause them to impact the bushings. | * Excessive valve spring pressure can force too much pressure back down against the spinning cams and cause them to impact the bushings. | ||
| * **Installing rocker boxes**: | * **Installing rocker boxes**: | ||
| * Failure to bleed down the lifters when removing the rocker boxes can gouge the cam bearings. \\ (creating a bump in the bushing to camshaft clearance) \\ With a spec of .0008"-.003" clearance already, the extra bump could wind up too close to the shaft, create extra heat and seize the bushing. | * Failure to bleed down the lifters when removing the rocker boxes can gouge the cam bearings. \\ (creating a bump in the bushing to camshaft clearance) \\ With a spec of .0008"-.003" clearance already, the extra bump could wind up too close to the shaft, create extra heat and seize the bushing. | ||
| - | |||
| ===== Engine Running Conditions ===== | ===== Engine Running Conditions ===== | ||
| - | |||
| * **Cases get hot and the aluminum bore expands allowing the bushing to turn**? | * **Cases get hot and the aluminum bore expands allowing the bushing to turn**? | ||
| - | * The bushings are made from SAE 660 / CDA 93200 bronze and the alloy is (copper 83%, tin 7%, lead 7%, zinc 3%. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1347648&page=8)) | + | * The bushings are made from SAE 660 / CDA 93200 bronze and the alloy is (copper 83%, tin 7%, lead 7%, zinc 3%. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/129191-look-at-my-bushings/page8?t=1347648&page=8)) |
| * Bronze has a coefficient thermal expansion of .0000010" per inch per each degree f of temp. | * Bronze has a coefficient thermal expansion of .0000010" per inch per each degree f of temp. | ||
| * Aluminum is .0000012". | * Aluminum is .0000012". | ||
| Line 69: | Line 67: | ||
| * The cast aluminum cam cover case being thinner than the bronze bushing may heat up and expand sooner, possibly loosening the fit between the case and the bushing? \\ The bushing is in intimate contact with the cover bore resulting in excellent heat transfer. So the parts remain at equal temps. | * The cast aluminum cam cover case being thinner than the bronze bushing may heat up and expand sooner, possibly loosening the fit between the case and the bushing? \\ The bushing is in intimate contact with the cover bore resulting in excellent heat transfer. So the parts remain at equal temps. | ||
| * Translation: The bushing is more likely to spin in the bore on a cold engine startup than hot due to thermal qualities. | * Translation: The bushing is more likely to spin in the bore on a cold engine startup than hot due to thermal qualities. | ||
| - | * **Bushings get too hot and stick to the cams then spin in the case**? \\ The cams are splash lubed. They don't get oiled from oil pump pressure (feed side). ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2077485&page=24)) \\ You could see thru your inner cam bores into the crankcase if the flywheels were removed. In operation; \\ The inner bushings are fed from air/oil mist windage from the back and from gravity from the slot in the bushings that are suppose to all point North. \\ The outer bushings are fed from air/oil mist entering the back of the cam cover through holes in the bores. \\ In 92-up engines, there is a small hole in the oil galley (lifter feed) that squirts down on #2 cam (thrown about in cam chest). | + | * **Bushings get too hot and stick to the cams then spin in the case**? \\ The cams are splash lubed. They don't get oiled from oil pump pressure (feed side). ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page24?t=2077485&page=24)) \\ You could see thru your inner cam bores into the crankcase if the flywheels were removed. In operation; \\ The inner bushings are fed from air/oil mist windage from the back and from gravity from the slot in the bushings that are suppose to all point North. \\ The outer bushings are fed from air/oil mist entering the back of the cam cover through holes in the bores. \\ In 92-up engines, there is a small hole in the oil galley (lifter feed) that squirts down on #2 cam (thrown about in cam chest). |
| * **Insufficient lubrication**. \\ | * **Insufficient lubrication**. \\ | ||
| * **Lugging the engine**. | * **Lugging the engine**. | ||
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| * **Sheared pinion shaft key at pinion gear allowing it to turn and change overall cam timing**? | * **Sheared pinion shaft key at pinion gear allowing it to turn and change overall cam timing**? | ||
| * Assuming all four cams stay in time with each other and the pinion gear spins; \\ This results in the (now out of time) valves slapping 1 piston or both depending on how far the gear traveled. \\ And the force travels back to the cams knocking the shafts into a bushing and spinning it. \\ What happens to one cam happens to all once the clearance between the teeth mesh is taken up from being in a bind. \\ So one bent pushrod or piston slapping a valve can possibly spin all four cams bushings. | * Assuming all four cams stay in time with each other and the pinion gear spins; \\ This results in the (now out of time) valves slapping 1 piston or both depending on how far the gear traveled. \\ And the force travels back to the cams knocking the shafts into a bushing and spinning it. \\ What happens to one cam happens to all once the clearance between the teeth mesh is taken up from being in a bind. \\ So one bent pushrod or piston slapping a valve can possibly spin all four cams bushings. | ||
| - | * The bushings are a press/interferance fit (not bolted or pinned). The camshafts turn in the center of the bushings while the engine is running (not touching the bushing). \\ When the valve opens, pressure is exerted in 2 directions (cam to valve and valve to cam). ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2077485&page=26)) \\ The valve opens due to that being the weakest point (sprung) when the lobe lifts. The cam has no springs. \\ The sudden jolt of the piston hitting the valve can transfer back down the path. \\ (and push the spinning cam's shaft against a bushing it's not suppose to be touching while spinning) \\ Thus catching and spinning the bushing (no oiling issues to seize the bushings) | + | * The bushings are a press/interferance fit (not bolted or pinned). The camshafts turn in the center of the bushings while the engine is running (not touching the bushing). \\ When the valve opens, pressure is exerted in 2 directions (cam to valve and valve to cam). ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page26?t=2077485&page=26)) \\ The valve opens due to that being the weakest point (sprung) when the lobe lifts. The cam has no springs. \\ The sudden jolt of the piston hitting the valve can transfer back down the path. \\ (and push the spinning cam's shaft against a bushing it's not suppose to be touching while spinning) \\ Thus catching and spinning the bushing (no oiling issues to seize the bushings) |
| * **Repair**. When the bushings spin in the cases, they don't leave a perfectly round bore. As they spin, they rip/ream some of the bore I.D. and may move the bore center. \\ Finding that center with oversize bushings should be done by a qualified machine shop. | * **Repair**. When the bushings spin in the cases, they don't leave a perfectly round bore. As they spin, they rip/ream some of the bore I.D. and may move the bore center. \\ Finding that center with oversize bushings should be done by a qualified machine shop. | ||
| - | * Dark Horse Crankworks offers a replacement service for spun bushings. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=2005347)) [[https://darkhorsecrankworks.com/|Click here for the link]]. \\ They can also upgrade them to bearings like the 4-speeds had. However, the cost of either service might approach the cost of a new set of cases. \\ Check with them and check with your dealer. New cases will be stamped with your VIN. \\ You literally have to turn in your old cases, or at least the portion of them that has the VIN, to buy new ones. | + | * Dark Horse Crankworks offers a replacement service for spun bushings. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/188092-cam-bushing-question-and-other-information-please?t=2005347)) [[https://darkhorsecrankworks.com/|Click here for the link]]. \\ They can also upgrade them to bearings like the 4-speeds had. However, the cost of either service might approach the cost of a new set of cases. \\ Check with them and check with your dealer. New cases will be stamped with your VIN. \\ You literally have to turn in your old cases, or at least the portion of them that has the VIN, to buy new ones. |
| - | * Easter MC sells oversized cam bushings to replace bushing number (25598-91). ((RKN of the XLFORUM http://xlforum.net/forums/showthread.php?t=2005347&page=2)) \\ +.005" oversized bushing (A-25598-91+5). [[https://vtwin.parts/harley-davidson-indian-motorcycle-eastern-bushingcam-gear-crankcase(.005)-a-25598-915|Click here for the link]]. \\ +.001" oversized bushing (A-25598-91+1) [[https://vtwin.parts/index.php?_route_=supplier/eastern/new-products/harley-davidson-indian-motorcycle-eastern-new-product-a-25598-911|Click here for the link]]. | + | * Easter MC sells oversized cam bushings to replace bushing number (25598-91). ((RKN of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/188092-cam-bushing-question-and-other-information-please/page2?t=2005347&page=2)) \\ +.005" oversized bushing (A-25598-91+5). [[https://vtwin.parts/harley-davidson-indian-motorcycle-eastern-bushingcam-gear-crankcase(.005)-a-25598-915|Click here for the link]]. \\ +.001" oversized bushing (A-25598-91+1) [[https://vtwin.parts/index.php?_route_=supplier/eastern/new-products/harley-davidson-indian-motorcycle-eastern-new-product-a-25598-911|Click here for the link]]. |
| - | | Spun #2 outer cam bushing, 2006 cam cover. Heat coloring on front of cam. ((photos by drummerboy4as of the XLFORUM http://xlforum.net/forums/showthread.php?t=548748)) || | + | | Spun #2 outer cam bushing, 2006 cam cover. Heat coloring on front of cam. ((photos by drummerboy4as of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/76918-need-pn-for-the-rear-intake-cam-bushing-in-the-cam-cover?t=548748)) || |
| |{{:techtalk:ref:genmsr:2006_spun_cam_bushing_1_by_drummerboy4as.jpeg?direct&300|}}|{{:techtalk:ref:genmsr:2006_spun_cam_bushing_2_by_drummerboy4as.jpeg?direct&300|}}| | |{{:techtalk:ref:genmsr:2006_spun_cam_bushing_1_by_drummerboy4as.jpeg?direct&300|}}|{{:techtalk:ref:genmsr:2006_spun_cam_bushing_2_by_drummerboy4as.jpeg?direct&300|}}| | ||
| - | |||
| ====== Possible Causes of a Spun Pinion Shaft Gear ====== | ====== Possible Causes of a Spun Pinion Shaft Gear ====== | ||
| Line 109: | Line 106: | ||
| * **Loose pinion shaft nut**. | * **Loose pinion shaft nut**. | ||
| - | * When installing the pinion nut, use Loctite red per the manual, and torque it to 70ft-lbs. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5746883)) \\ It's pretty rare to have the gear fail in a stock Sportster. You typically only run into this issue after hop-up work. \\ The factory torque spec is 35-45 ft/lbs. which is too little torque for upgraded engines and often results in a sheared pinion key. | + | * When installing the pinion nut, use Loctite red per the manual, and torque it to 70ft-lbs. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196694-sportster-2008-problem-oil-pump-crankshaft-moved#post4296365)) \\ It's pretty rare to have the gear fail in a stock Sportster. You typically only run into this issue after hop-up work. \\ The factory torque spec is 35-45 ft/lbs. which is too little torque for upgraded engines and often results in a sheared pinion key. |
| * Per HD Tech Tip #19, the "T" key simply aligns the pinion shaft to the mark on the pinion gear for timing the cams. ((HD Tech Tip #19 dated June 1990)) \\ With the introduction of the one piece, right hand flywheel, the pinion shaft no longer has a taper. \\ Instead the oil pump drive gear and the pinion gear depend on clamp load to remain in position. | * Per HD Tech Tip #19, the "T" key simply aligns the pinion shaft to the mark on the pinion gear for timing the cams. ((HD Tech Tip #19 dated June 1990)) \\ With the introduction of the one piece, right hand flywheel, the pinion shaft no longer has a taper. \\ Instead the oil pump drive gear and the pinion gear depend on clamp load to remain in position. | ||
| * In the pics below, the little nub of the key that protrudes from under the oil pump gear is the only portion of the key that engages the pinion gear. ((aswracing of the XLFORUM)) \\ That's why it shears so easily if the nut is loose. There just ain't much holding it besides the clamp force of the nut. \\ The clamp force from the nut holds the pump gear on, not the key. | * In the pics below, the little nub of the key that protrudes from under the oil pump gear is the only portion of the key that engages the pinion gear. ((aswracing of the XLFORUM)) \\ That's why it shears so easily if the nut is loose. There just ain't much holding it besides the clamp force of the nut. \\ The clamp force from the nut holds the pump gear on, not the key. | ||
| Line 115: | Line 112: | ||
| * Breaking the key is a very common issue particularly when heavy valve springs are used. \\ The force from the springs transfers thru the cams to the pinion gear and puts extra pressure on the pinion key. \\ And that force may be enough to break the key allowing the pinion gear to move. \\ The fix is Loctite red and 70ft-lbs instead of the factory specified 35-45ft-lbs. You won't have this issue again. ((http://hammerperf.com/ttxlcaminstall.shtml#pinionnut)) \\ The higher clamp force is needed to overcome the pressure of heavy springs. | * Breaking the key is a very common issue particularly when heavy valve springs are used. \\ The force from the springs transfers thru the cams to the pinion gear and puts extra pressure on the pinion key. \\ And that force may be enough to break the key allowing the pinion gear to move. \\ The fix is Loctite red and 70ft-lbs instead of the factory specified 35-45ft-lbs. You won't have this issue again. ((http://hammerperf.com/ttxlcaminstall.shtml#pinionnut)) \\ The higher clamp force is needed to overcome the pressure of heavy springs. | ||
| - | + | | Pinion key location ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page22?t=2077485&page=22)) | Condition of key after gear spins ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196694-sportster-2008-problem-oil-pump-crankshaft-moved#post4296365)) |Pinion gear spun (app 90°), stopped and still turned \\ the cams from new location ((photo by npaisnel of the XLFORUM, edited by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page23?t=2077485&page=23))| | |
| - | | Pinion key location ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=2077485&page=22)) | Condition of key after gear spins ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5746883)) |Pinion gear spun (app 90°), stopped and still turned \\ the cams from new location ((photo by npaisnel of the XLFORUM, edited by Hippysmack http://xlforum.net/forums/showthread.php?t=2077485&page=23))| | + | |
| |{{:techtalk:evo:engmech:pinion_key_nub_by_aswracing.jpg?direct&300|}}| {{:techtalk:ref:genmsr:sheared_pinion_shaft_key_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:spun_pinion_gear_2_by_npaisnel.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:pinion_key_nub_by_aswracing.jpg?direct&300|}}| {{:techtalk:ref:genmsr:sheared_pinion_shaft_key_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:spun_pinion_gear_2_by_npaisnel.jpg?direct&300|}}| | ||
| \\ | \\ | ||
| Line 123: | Line 119: | ||
| * This also brings concerns of bent pushrods from the cams getting out of time due to the spun pinion gear and a valve hitting a piston. | * This also brings concerns of bent pushrods from the cams getting out of time due to the spun pinion gear and a valve hitting a piston. | ||
| - | | 1988-up oil pump drive gear / pinion gear keyways. ((photo by npaisnel of the XLFORUM, labeled by Hippysmack http://xlforum.net/forums/showthread.php?t=2077485&page=26)) | | + | | 1988-up oil pump drive gear / pinion gear keyways. ((photo by npaisnel of the XLFORUM, labeled by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page26?t=2077485&page=26)) | |
| |{{:techtalk:evo:engmech:oil_pump-pinion_gear_keyways_by_npaisnel.jpg?direct&350|}}| | |{{:techtalk:evo:engmech:oil_pump-pinion_gear_keyways_by_npaisnel.jpg?direct&350|}}| | ||
| - | | Pinion gear slot aligned with pump gear face. ((photo by Hippysmack)) | Spun pinion gear. ((photos by npaisnel of the XLFORUM, labeled by Hippysmack http://xlforum.net/forums/showthread.php?t=2077485&page=24)) || | + | | Pinion gear slot aligned with pump gear face. ((photo by Hippysmack)) | Spun pinion gear. ((photos by npaisnel of the XLFORUM, labeled by Hippysmack https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page24?t=2077485&page=24)) || |
| |{{:techtalk:evo:engmech:pinion_gear_-_shaft_alignment_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:genmsr:spun_pinion_gear_4_by_npaisnel.jpg?direct&300|}}|{{:techtalk:ref:genmsr:spun_pinion_gear_3_by_npaisnel.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:pinion_gear_-_shaft_alignment_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:genmsr:spun_pinion_gear_4_by_npaisnel.jpg?direct&300|}}|{{:techtalk:ref:genmsr:spun_pinion_gear_3_by_npaisnel.jpg?direct&300|}}| | ||
| - | ===== Affects of a Spun Pinion Shaft Gear ===== | ||
| - | The drawing below shows 2 valve trains at the same time on the same cylinder using Andrews N-4 cams. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2077485&page=28)) \\ | + | ===== Affects of a Spun Pinion Shaft Gear ===== |
| + | The drawing below shows 2 valve trains at the same time on the same cylinder using Andrews N-4 cams. ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/200486-crank-failure-and-killed-my-1275-hammer-build/page28?t=2077485&page=28)) \\ | ||
| It represents cam timing/valve opening and closing times in respect to piston position. \\ | It represents cam timing/valve opening and closing times in respect to piston position. \\ | ||
| The blue directional arrow represents engine rotation direction. The orange and green lines represent cam/valve lift and / or position at the specific crank locations in degrees. \\ | The blue directional arrow represents engine rotation direction. The orange and green lines represent cam/valve lift and / or position at the specific crank locations in degrees. \\ | ||
| Line 169: | Line 165: | ||
| {{:techtalk:ref:genmsr:valve_timing_with_spun_pinion_gear_drawing_by_hippysmack.jpg?direct&400|}} ((Drawing by Hippysmack)) \\ | {{:techtalk:ref:genmsr:valve_timing_with_spun_pinion_gear_drawing_by_hippysmack.jpg?direct&400|}} ((Drawing by Hippysmack)) \\ | ||
| - | |||
| ====== Crankshaft Out of True ====== | ====== Crankshaft Out of True ====== | ||
| See [[techtalk:ref:svcproc24|Measuring Pinion Shaft Runout]] in the REF section of the Sportsterpedia. \\ | See [[techtalk:ref:svcproc24|Measuring Pinion Shaft Runout]] in the REF section of the Sportsterpedia. \\ | ||
| - | * Safe installation of the pinion gear requires a pinion locking tool as well. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5746883)) \\ If you hold the crank by any other method while removing or installing the pinion nut, you apply torque through the crank from one side to the other. \\ And they're not designed to hold much torque that way, you risk knocking it out of true. | + | * Safe installation of the pinion gear requires a pinion locking tool as well. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196694-sportster-2008-problem-oil-pump-crankshaft-moved#post4296365)) \\ If you hold the crank by any other method while removing or installing the pinion nut, you apply torque through the crank from one side to the other. \\ And they're not designed to hold much torque that way, you risk knocking it out of true. |
| - | <blockquote>Here's the worst symptom of an out-of-true crank. The pinion shaft snapped. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1578649&page=2)) \\ | + | <blockquote>Here's the worst symptom of an out-of-true crank. The pinion shaft snapped. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/145445-cam-bushing-wear/page2?t=1578649&page=2)) \\ |
| This particular one happened at roughly 180mph. I had qualified the bike at 207 and change, and was on my backup pass. \\ | This particular one happened at roughly 180mph. I had qualified the bike at 207 and change, and was on my backup pass. \\ | ||
| Everything was going smooth, I had it wound out in 4th, I eased off the throttle, clicked it into 5th, eased out the clutch and rolled back into it and ... \\ | Everything was going smooth, I had it wound out in 4th, I eased off the throttle, clicked it into 5th, eased out the clutch and rolled back into it and ... \\ | ||
| Line 186: | Line 181: | ||
| He had done the same thing. \\ | He had done the same thing. \\ | ||
| </blockquote> | </blockquote> | ||
| - | {{:techtalk:ref:genmsr:broken_pinion_shaft_by_aswracing.jpg?direct&300|}} ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1578649&page=2)) \\ | + | {{:techtalk:ref:genmsr:broken_pinion_shaft_by_aswracing.jpg?direct&300|}} ((photo by aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/145445-cam-bushing-wear/page2?t=1578649&page=2)) \\ |
| ====== Crankshaft / Rod Bearing Failure ====== | ====== Crankshaft / Rod Bearing Failure ====== | ||
| - | |||
| * **Crank Failure**. | * **Crank Failure**. | ||
| - | * Crank failure is usually always seen from the front (center) rod bearings that go first. That includes aftermarket cranks as well. ((NRHS Sales of the XLFORUM http://xlforum.net/forums/showthread.php?t=132507&page=4)) ((http://xlforum.net/forums/showthread.php?t=132507&page=5)) \\ There have been more 04 and 05 failures than we ever saw with the 03s and older. \\ Most of the 04 and 05s also have less miles than your typical 03 and under does too so it tells me that the new cranks have much worse bearings. | + | * Crank failure is usually always seen from the front (center) rod bearings that go first. That includes aftermarket cranks as well. ((NRHS Sales of the XLFORUM)) \\ There have been more 04 and 05 failures than we ever saw with the 03s and older. \\ Most of the 04 and 05s also have less miles than your typical 03 and under does too so it tells me that the new cranks have much worse bearings. |
| \\ | \\ | ||
| [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | ||
