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techtalk:ref:wheels06 [2022/08/25 18:15] hippysmack [Bleeding The Brake System By The Book] |
techtalk:ref:wheels06 [2024/01/25 01:28] hippysmack |
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| ====== REF: Wheels, Brakes & Tires ====== | ====== REF: Wheels, Brakes & Tires ====== | ||
| ====== Bleeding the Brake Lines ====== | ====== Bleeding the Brake Lines ====== | ||
| + | This page consists of many different means and methods to bleed the brake system and perspective advice. \\ | ||
| + | All will work some of the time and none will work some of the time. And what works for one person doesn't work for the next either. \\ | ||
| + | |||
| + | The right way is the way that works for you! \\ | ||
| - | ====== Bleeding The Brake System By The Book ====== | ||
| - | This page consists of many different ways to bleed the brake system and perspective advice. \\ | ||
| One way seems to work for some but not for others and having several options gives a person versatility. \\ | One way seems to work for some but not for others and having several options gives a person versatility. \\ | ||
| However, your main tool when bleeding brakes is patience. \\ | However, your main tool when bleeding brakes is patience. \\ | ||
| \\ | \\ | ||
| + | ====== Bleeding The Brake System By The Book ====== | ||
| **Note on potential brake fluid leaks**: \\ | **Note on potential brake fluid leaks**: \\ | ||
| 2000 model brake bleeder screws can retain fluid on the threads and in the bleeder bore which can seep out giving the impression there is a brake fluid leak. ((HD Tech Tip #51 dated December 1999)) \\ | 2000 model brake bleeder screws can retain fluid on the threads and in the bleeder bore which can seep out giving the impression there is a brake fluid leak. ((HD Tech Tip #51 dated December 1999)) \\ | ||
| Line 19: | Line 22: | ||
| Residual fluid will be removed during normal washings. If brake fluid re-appears, diagnose the cause. \\ | Residual fluid will be removed during normal washings. If brake fluid re-appears, diagnose the cause. \\ | ||
| If fluid re-appears at the caliper seam or mounting bolts, it may indicate the crossover seals are leaking. \\ Disassemble and repair the caliper using the procedures in the appropriate FSM. \\ | If fluid re-appears at the caliper seam or mounting bolts, it may indicate the crossover seals are leaking. \\ Disassemble and repair the caliper using the procedures in the appropriate FSM. \\ | ||
| - | ==== Notes: ==== | ||
| + | ==== Notes: ==== | ||
| * When checking the relief port operation: | * When checking the relief port operation: | ||
| * The 2000 FSM says to check the relief port after bleeding the system. ((2000 HD XLH FSM pg 2-57)) | * The 2000 FSM says to check the relief port after bleeding the system. ((2000 HD XLH FSM pg 2-57)) | ||
| Line 28: | Line 31: | ||
| ==== When You Should Bleed The System ==== | ==== When You Should Bleed The System ==== | ||
| - | |||
| - Bleed the hydraulic brake system anytime a brake line, M/C or caliper has been opened. | - Bleed the hydraulic brake system anytime a brake line, M/C or caliper has been opened. | ||
| - Whenever the brake pedal or lever operation feels spongy. | - Whenever the brake pedal or lever operation feels spongy. | ||
| - | ==== Before Bleeding ==== | ||
| + | ==== Before Bleeding ==== | ||
| Arrange for the master cylinder to be in a level position by standing the bike upright (off the kickstand). | Arrange for the master cylinder to be in a level position by standing the bike upright (off the kickstand). | ||
| ==== Manually Bleeding ==== | ==== Manually Bleeding ==== | ||
| - | |||
| - Install the end of a length of plastic tubing over the caliper bleeder valve. Place the free end of the tube in a clean container. | - Install the end of a length of plastic tubing over the caliper bleeder valve. Place the free end of the tube in a clean container. | ||
| - Add new brake fluid to M/C until the fluid level is 1/8” (3.2mm) from the top. | - Add new brake fluid to M/C until the fluid level is 1/8” (3.2mm) from the top. | ||
| Line 54: | Line 55: | ||
| ==== Bleeding ABS Brake System ==== | ==== Bleeding ABS Brake System ==== | ||
| - | The trick with ABS is when bleeding the fluid, a scan tool is needed to activate the ABS pumps to bleed properly. ((decman of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003960)) \\ | + | The trick with ABS is when bleeding the fluid, a scan tool is needed to activate the ABS pumps to bleed properly. ((decman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/187728-changing-brake-pads-on-abs-bikes?t=2003960)) \\ |
| Daytona Twin Tec Twin Scan II and III can be used for that. \\ | Daytona Twin Tec Twin Scan II and III can be used for that. \\ | ||
| When changing the pads, only compress the pistons enough for the new pads. \\ | When changing the pads, only compress the pistons enough for the new pads. \\ | ||
| Remove some fluid before doing that. \\ | Remove some fluid before doing that. \\ | ||
| Also careful with the ABS wheel sensors / wires when removing the calipers. \\ | Also careful with the ABS wheel sensors / wires when removing the calipers. \\ | ||
| + | |||
| ====== Bleeding Methods from XLFORUM Members ====== | ====== Bleeding Methods from XLFORUM Members ====== | ||
| See also [[techtalk:ref:wheels06a|An Exercise in Bleeding the Brake System]] \\ | See also [[techtalk:ref:wheels06a|An Exercise in Bleeding the Brake System]] \\ | ||
| - | |||
| - | There are many methods of bleeding brakes from XLFORUM members as outlined below. \\ | ||
| - | All will work some of the time and none will work some of the time. \\ | ||
| - | What works for one person doesn't work for the next either. \\ | ||
| - | |||
| - | The right way is the way that works for you! | ||
| - | |||
| ====== Reverse Bleeding Thru the Calipers ====== | ====== Reverse Bleeding Thru the Calipers ====== | ||
| ===== Using a Syringe ===== | ===== Using a Syringe ===== | ||
| - | |||
| The key to this method is a slow push from the caliper to the master cylinder. \\ | The key to this method is a slow push from the caliper to the master cylinder. \\ | ||
| - | Too fast and you spit brake fluid all over the bike and the floor. \\ | + | Too fast and you spit brake fluid all over the bike and the floor due to exerting higher pressure into the line. \\ |
| - | The handle end of the master cylinder must be higher than the hose end so the air bubbles will move to the relief port of the master cylinder. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1025390&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) \\ | + | It may be hard to push the syringe plunger especially if pushing hard. ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/204454-reverse-bleed-question#post4596184)) \\ |
| - | You can also use a squirt type oil can with some rubber tubing on the spout slipped over the cracked-open bleeder. ((chopfather of the XLFORUM http://xlforum.net/forums/showthread.php?t=33235&page=3)) \\ | + | The hole in the MC is smaller than the hose and you'll be pushing fluid uphill from the bleeder screw thru the small orifice in the master cylinder. \\ |
| + | This creates back pressure on the line down to the syringe from that hole. \\ | ||
| + | And that is where the pressure comes from (back pressure due to the smaller outlet ID. \\ | ||
| + | The faster / harder you push, the harder it's going to be to move the syringe. But it will work as many people do use this method. \\ | ||
| + | Likewise, the slower you push, the easier it should be to move the fluid (not to say it will be easy though, depending on hand strength). \\ | ||
| + | |||
| + | The handle end of the master cylinder must be higher than the hose end so the air bubbles will move to the relief port of the master cylinder. ((ryder rick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/109840-bleeding-front-brake?t=1025390&highlight=Brake+Fluid+Bleeding+w/Syringe)) \\ | ||
| + | You can also use a squirt type oil can with some rubber tubing on the spout slipped over the cracked-open bleeder. ((chopfather of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-photos-videos/20061-bleeding-brakes/page3?t=33235&page=3)) \\ | ||
| Or, you can use a turkey basting syringe and a foot of rubber hose. | Or, you can use a turkey basting syringe and a foot of rubber hose. | ||
| - | - Discard the needle from the syringe, remove lid from master cylinder and re-set it on top. \\ It must be off of course, but the master cylinder must be covered to prevent the fluid from squirting 10' across the shop. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Discard the needle from the syringe, remove lid from master cylinder and re-set it on top. \\ It must be off of course, but the master cylinder must be covered to prevent the fluid from squirting 10' across the shop. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | - Attach a short clear plastic tube to the end of the syringe. \\ Best to use a tube that is "too small" in diameter. \\ This is important to get a really tight seal on the bleeder to the point you have to force it onto the bleeder with needle nose pliers. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Attach a short clear plastic tube to the end of the syringe. \\ Best to use a tube that is "too small" in diameter. \\ This is important to get a really tight seal on the bleeder to the point you have to force it onto the bleeder with needle nose pliers. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | - Use the syringe to empty the master cylinder and discard this fluid. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Use the syringe to empty the master cylinder and discard this fluid. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | - Fill the syringe with new brake fluid and let stand for 5 minutes or so for the bubbles to rise out of the syringe / tube. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Fill the syringe with new brake fluid and let stand for 5 minutes or so for the bubbles to rise out of the syringe / tube. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | - Attach to bleeder, hold it upright and fiddle with the tube until air has risen into syringe. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Attach to bleeder, hold it upright and fiddle with the tube until air has risen into syringe. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | - Loosen the bleeder and slowly squeeze the fluid through. \\ Do not release pressure on the syringe without tightening the bleeder. \\ Or some fluid and possibly some air may get drawn back. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1489822&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | - Loosen the bleeder and slowly squeeze the fluid through. \\ Do not release pressure on the syringe without tightening the bleeder. \\ Or some fluid and possibly some air may get drawn back. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/137228-the-right-way-to-flush-brake-lines?t=1489822&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| Using 30ML syringes (or anything smaller than 60ML), \\ | Using 30ML syringes (or anything smaller than 60ML), \\ | ||
| - | You'll have to push fluid at least two separate times to get new fluid / air from the bottom to the M/C. ((TheForce of the XLFORUM http://xlforum.net/forums/archive/index.php/t-50864.html)) \\ | + | You'll have to push fluid at least two separate times to get new fluid / air from the bottom to the M/C. ((TheForce of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/30549-question-on-bleeding-brakes-w-syringe)) \\ |
| - Draw in a 30 ML's of brake fluid into the syringe and cover the master cylinder with a rag. | - Draw in a 30 ML's of brake fluid into the syringe and cover the master cylinder with a rag. | ||
| Line 94: | Line 95: | ||
| - Lightly pump the M/C a few times and hold. | - Lightly pump the M/C a few times and hold. | ||
| - Open the bleed valve and repeat until you feel a good strong push. | - Open the bleed valve and repeat until you feel a good strong push. | ||
| + | |||
| ===== Using a Vacuum Pump ===== | ===== Using a Vacuum Pump ===== | ||
| - | + | * You can use a vacuum pump to reverse bleed fluid from a jar, up the brake line and into caliper. ((Matt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/28453-is-the-mighty-vac-worth-the-40-bucks-for-brake-bleeding?t=47150)) | |
| - | * You can use a vacuum pump to reverse bleed fluid from a jar, up the brake line and into caliper. ((Matt of the XLFORUM http://xlforum.net/forums/showthread.php?t=47150)) | + | |
| ====== Force Bleeding Thru the Bleeder Screw ====== | ====== Force Bleeding Thru the Bleeder Screw ====== | ||
| Line 102: | Line 103: | ||
| ===== Using a Hose and a Jar ===== | ===== Using a Hose and a Jar ===== | ||
| + | * Get a small rubber hose like for the windshield washer on your car about a foot long. \\ You may need to heat it to get it over bleeder valve tip. \\ Put it on the bleeder valve and place the other end in a jar submerged in brake fluid. \\ You can use a jar with a lid and punch a hole the size of the hose in the lid. \\ This keeps the hose from coming out the fluid in the jar. \\ As you pump the brake and let off, the only thing it can pull back is brake fluid. \\ The air goes out the fluid in the jar. \\ Do this awhile and you'll see no more air bubbles coming from the jar. \\ Close bleeder and your good to go. \\ Make sure to not let the master cylinder go dry while doing this. ((ezmerf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/112336-can-t-bleed-the-rear-brake-keep-getting-air-bubbles/page2?t=1062732&highlight=Brake+Fluid+Bleeding+w/Syringe&page=2)) \\ | ||
| - | * Get a small rubber hose like for the windshield washer on your car about a foot long. \\ You may need to heat it to get it over bleeder valve tip. \\ Put it on the bleeder valve and place the other end in a jar submerged in brake fluid. \\ You can use a jar with a lid and punch a hole the size of the hose in the lid. \\ This keeps the hose from coming out the fluid in the jar. \\ As you pump the brake and let off, the only thing it can pull back is brake fluid. \\ The air goes out the fluid in the jar. \\ Do this awhile and you'll see no more air bubbles coming from the jar. \\ Close bleeder and your good to go. \\ Make sure to not let the master cylinder go dry while doing this. ((ezmerf of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062732&highlight=Brake+Fluid+Bleeding+w%2FSyringe&page=2)) \\ | + | Below, the tube is an automotive shop one-way bleeder set up, but it goes inside the plastic bottle with a small hole in the lid. ((Hopper of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/50355-and-yet-another-77-ground-up-rebuild/page6?t=209347&highlight=float+level&page=6)) \\ |
| - | + | ||
| - | Below, the tube is an automotive shop one-way bleeder set up, but it goes inside the plastic bottle with a small hole in the lid. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=209347&highlight=float+level&page=6)) \\ | + | |
| So when the lid is screwed on, even if you knock the bottle over, brake fluid stays inside. \\ | So when the lid is screwed on, even if you knock the bottle over, brake fluid stays inside. \\ | ||
| The wire hook is to hang the bottle on the fender etc. and it stays out of harm's way. \\ | The wire hook is to hang the bottle on the fender etc. and it stays out of harm's way. \\ | ||
| The clothes peg and tag on the bleed hose is to put the hose in the upwards position from the bleed nipple for good air bleed-out. \\ | The clothes peg and tag on the bleed hose is to put the hose in the upwards position from the bleed nipple for good air bleed-out. \\ | ||
| - | | Milk jug and a hose. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=209347&highlight=float+level&page=6)) | | + | | Milk jug and a hose. ((photo by Hopper of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/50355-and-yet-another-77-ground-up-rebuild/page6?t=209347&highlight=float+level&page=6)) | |
| |{{:techtalk:ref:wheels:brake_bleeding_system_by_hopper.jpg?direct&300|}}| | |{{:techtalk:ref:wheels:brake_bleeding_system_by_hopper.jpg?direct&300|}}| | ||
| + | |||
| ===== Using Gravity Assist ===== | ===== Using Gravity Assist ===== | ||
| - | If you're bleeding air; ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072934)) \\ | + | If you're bleeding air; ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/196411-bleeding-rear-brakes-and-adjustment-1985?t=2072934)) \\ |
| You can use a clear hose on the end of the bleeder screw (hung high) and you can see exactly what's coming out the brake system. \\ | You can use a clear hose on the end of the bleeder screw (hung high) and you can see exactly what's coming out the brake system. \\ | ||
| This gives confirmation of the presence of air / debris as well as positive reinforcement that the air is being expelled. \\ | This gives confirmation of the presence of air / debris as well as positive reinforcement that the air is being expelled. \\ | ||
| Line 173: | Line 174: | ||
| ===== Using the Finger Method ===== | ===== Using the Finger Method ===== | ||
| - | + | * First, top off the master cylinder and then remove the bleed screw completely. ((rick szymanski of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/132514-how-to-bleed-the-front-duel-disk-brakes?t=1417991&highlight=Brake+Fluid+Bleeding+w/Syringe)) | |
| - | * First, top off the master cylinder and then remove the bleed screw completely. ((rick szymanski of the XLFORUM http://xlforum.net/forums/showthread.php?t=1417991&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | |
| * Plug the bleed screw hole with your finger tightly. | * Plug the bleed screw hole with your finger tightly. | ||
| * Have a friend or you can do it yourself, one at a time. | * Have a friend or you can do it yourself, one at a time. | ||
| * Squeeze the brake while holding tightly over the bleed hole. | * Squeeze the brake while holding tightly over the bleed hole. | ||
| * The fluid and air will push past your finger and seal immediately when the brake is released. | * The fluid and air will push past your finger and seal immediately when the brake is released. | ||
| - | * Your finger will let pressure spray out, but will not let air get sucked back in. ((dabronco of the XLFORUM http://xlforum.net/forums/showthread.php?t=47150&page=2)) | + | * Your finger will let pressure spray out, but will not let air get sucked back in. ((dabronco of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/28453-is-the-mighty-vac-worth-the-40-bucks-for-brake-bleeding/page2?t=47150&page=2)) |
| * It's a lot easier and faster than the opening and closing a bleed screw. | * It's a lot easier and faster than the opening and closing a bleed screw. | ||
| * You can do dual calipers at once this way if you have a helper. | * You can do dual calipers at once this way if you have a helper. | ||
| - | * Once you have a solid stream of fluid, you are fine. ((rick szymanski of the XLFORUM http://xlforum.net/forums/showthread.php?t=1417991&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | * Once you have a solid stream of fluid, you are fine. ((rick szymanski of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/132514-how-to-bleed-the-front-duel-disk-brakes?t=1417991&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| * This is exactly what Speed Bleeders do. They take the place of and act the same as your finger would. ((Hippysmack)) | * This is exactly what Speed Bleeders do. They take the place of and act the same as your finger would. ((Hippysmack)) | ||
| | | ||
| ===== Using Speed Bleeders ===== | ===== Using Speed Bleeders ===== | ||
| - | * Swap your bleeder screw out for a [[http://www.speedbleeder.com/|Speed Bleeder®]]. (('79 Supercharged Fuel Inj of the XLFORUM http://xlforum.net/forums/showthread.php?t=1188401&highlight=Brake+Fluid+Bleeding+w%2FSyringe&page=2)) \\ It is very simple to install: | + | * Swap your bleeder screw out for a [[http://www.speedbleeder.com/|Speed Bleeder®]]. (('79 Supercharged Fuel Inj of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/121410-bleeding-front-brake/page2?t=1188401&highlight=Brake+Fluid+Bleeding+w/Syringe&page=2)) \\ It is very simple to install: |
| - Simply clean the area around the old bleeder screw so that no dirt or contaminants can get into the brake system. | - Simply clean the area around the old bleeder screw so that no dirt or contaminants can get into the brake system. | ||
| - Remove the old bleeder screw and discard. | - Remove the old bleeder screw and discard. | ||
| Line 194: | Line 194: | ||
| * After bubble-free fluid comes out of the Speed Bleeder screw, close the bleeder until it seats. | * After bubble-free fluid comes out of the Speed Bleeder screw, close the bleeder until it seats. | ||
| * Proceed to the next caliper until all are bled. | * Proceed to the next caliper until all are bled. | ||
| - | * The Speed Bleeder screw has a check valve inside so it can't suck air at the bottom. They're cheap too! ((oldnavy of the XLFORUM http://xlforum.net/forums/showthread.php?t=1025390&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) | + | * The Speed Bleeder screw has a check valve inside so it can't suck air at the bottom. They're cheap too! ((oldnavy of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/109840-bleeding-front-brake?t=1025390&highlight=Brake+Fluid+Bleeding+w/Syringe)) |
| - | Speed bleeder part numbers by manufacturer. ((IXL2Relax of the XLFORUM http://xlforum.net/forums/showthread.php?t=15444&page=5)) | + | Speed bleeder part numbers by manufacturer. ((IXL2Relax of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/9890-speedbleeders/page5?t=15444&page=5)) |
| |Brand|Material|Size|Part#|Length|Notes| | |Brand|Material|Size|Part#|Length|Notes| | ||
| |Russell Brand Speed Bleeders|Stainless Steel|1/4-28|R40525| ? |HD (44179-58)| | |Russell Brand Speed Bleeders|Stainless Steel|1/4-28|R40525| ? |HD (44179-58)| | ||
| Line 243: | Line 243: | ||
| ====== Vacuum Bleeding ====== | ====== Vacuum Bleeding ====== | ||
| - | You can get an inexpensive vacuum bleeder at most auto parts stores. ((stealthammer of the XLFORUM http://xlforum.net/forums/showthread.php?t=791904)) \\ | + | You can get an inexpensive vacuum bleeder at most auto parts stores. ((stealthammer of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/95063-help-q-re-replacing-fluid-after-installing-brake-line?t=791904)) \\ |
| - | Basically, you suck the fluid out of the system's hoses, calipers, and master cylinder using a small hand held vacuum pump (known brand: Mighty Vac). ((Joebug of the XLFORUM http://xlforum.net/forums/showthread.php?p=5707568&highlight=mighty+vac#post5707568)) \\ | + | Basically, you suck the fluid out of the system's hoses, calipers, and master cylinder using a small hand held vacuum pump (known brand: Mighty Vac). ((Joebug of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/195114-brake-upgrade-can-t-bleed/page2?highlight=mighty+vac#post4244079)) \\ |
| You draw all the air out with the brake fluid. \\ | You draw all the air out with the brake fluid. \\ | ||
| But it doesn't always work when tiny air bubbles are trapped in crevices etc. inside the internals of the master cylinder. \\ | But it doesn't always work when tiny air bubbles are trapped in crevices etc. inside the internals of the master cylinder. \\ | ||
| - | As in the case when using DOT 5 brake fluid. ((DIESEL of the XLFORUM http://xlforum.net/forums/showthread.php?t=91538&page=2)) \\ | + | As in the case when using DOT 5 brake fluid. ((DIESEL of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/40848-bleeding-the-rear-brake/page2?t=91538&page=2)) \\ |
| DOT 5 is silicon based and it requires patients when using a vacuum bleeder. \\ | DOT 5 is silicon based and it requires patients when using a vacuum bleeder. \\ | ||
| It may frustrate you more than anything if it sucks too hard (creating air bubbles). \\ | It may frustrate you more than anything if it sucks too hard (creating air bubbles). \\ | ||
| - | In speaking of too much vacuum, here is a homemade bleeding system using a vacuum cleaner and a canister. ((photo by Bob F of the XLFORUM http://xlforum.net/forums/showthread.php?t=1857463&page=2)) \\ | + | In speaking of too much vacuum, here is a homemade bleeding system using a vacuum cleaner and a canister. ((photo by Bob F of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/173094-what-tool-works-on-brake-caliper-mounting-screw/page2?t=1857463&page=2)) \\ |
| {{:techtalk:ref:tools:homemade_brake_bleeding_system_by_bob_f.jpg?direct&300|}} | {{:techtalk:ref:tools:homemade_brake_bleeding_system_by_bob_f.jpg?direct&300|}} | ||
| - | ===== Mighty Vac ===== | ||
| - | The Mighty-Vac's big point is assisting in clearing brakes lines of air bubbles, in lines that have high spots which air migrates to. ((Gone of the XLFORUM http://xlforum.net/forums/showthread.php?t=47150)) \\ | + | ===== Mighty Vac ===== |
| + | The Mighty-Vac's big point is assisting in clearing brakes lines of air bubbles, in lines that have high spots which air migrates to. ((Gone of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/28453-is-the-mighty-vac-worth-the-40-bucks-for-brake-bleeding?t=47150)) \\ | ||
| If the system is void of those problem areas, a Mighty-Vac is not likely to work any better. | If the system is void of those problem areas, a Mighty-Vac is not likely to work any better. | ||
| Line 272: | Line 272: | ||
| * **Apply vacuum**. | * **Apply vacuum**. | ||
| * It should only take about 8 to 10 pumps or so to get up to over 20 psi and hold. | * It should only take about 8 to 10 pumps or so to get up to over 20 psi and hold. | ||
| - | * Low vacuum is best. Too much and you pull air past the seals and it just looks like the air is never going to quit (because it isn't). ((Wedge of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071413&highlight=mighty+vac)) \\ | + | * Low vacuum is best. Too much and you pull air past the seals and it just looks like the air is never going to quit (because it isn't). ((Wedge of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/195114-brake-upgrade-can-t-bleed?t=2071413&highlight=mighty+vac)) \\ |
| - | * Open the bleeder (1/4 turn or so) and the air and fluid will pull right through. ((Shu of the XLFORUM http://xlforum.net/forums/showthread.php?t=791904&page=3)) | + | * Open the bleeder (1/4 turn or so) and the air and fluid will pull right through. ((Shu of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/95063-help-q-re-replacing-fluid-after-installing-brake-line/page3?t=791904&page=3)) |
| - | * Keep vacuum until it's a steady stream of fluid, then close it off. ((rick szymanski of the XLFORUM http://xlforum.net/forums/showthread.php?t=1417991&highlight=Brake+Fluid+Bleeding+w%2FSyringe)) \\ Make sure to maintain a vacuum or it could let air back in. ((baka1969 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1697062)) | + | * Keep vacuum until it's a steady stream of fluid, then close it off. ((rick szymanski of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/132514-how-to-bleed-the-front-duel-disk-brakes?t=1417991&highlight=Brake+Fluid+Bleeding+w/Syringe)) \\ Make sure to maintain a vacuum or it could let air back in. ((baka1969 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/158546-no-front-brake-pressure?t=1697062)) |
| * This will still take several tries until you get fluid. \\ Make sure you keep an eye on the bowl and don't let the fluid get too low or you will start to suck air. \\ Keep repeating until you on longer see any bubbles in the fluid line into the mightvac. | * This will still take several tries until you get fluid. \\ Make sure you keep an eye on the bowl and don't let the fluid get too low or you will start to suck air. \\ Keep repeating until you on longer see any bubbles in the fluid line into the mightvac. | ||
| * Once you get fluid, close bleeder, top off the master cylinder, put cover the back on and try to pump the brake pedal. | * Once you get fluid, close bleeder, top off the master cylinder, put cover the back on and try to pump the brake pedal. | ||
| - | * When you get pedal, then bleed manually to ensure that all air has escaped. ((XLFREAK of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062732&highlight=Brake+Fluid+Bleeding+w%2FSyringe&page=4)) | + | * When you get pedal, then bleed manually to ensure that all air has escaped. ((XLFREAK of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/112336-can-t-bleed-the-rear-brake-keep-getting-air-bubbles/page4?t=1062732&highlight=Brake+Fluid+Bleeding+w/Syringe&page=4)) |
| * If you apply vacuum and can not build it, then you have a leak somewhere in the system that must be repaired. | * If you apply vacuum and can not build it, then you have a leak somewhere in the system that must be repaired. | ||
| [[https://www.youtube.com/watch?v=qTySPh9xXJs|Here is a video on it also]] \\ | [[https://www.youtube.com/watch?v=qTySPh9xXJs|Here is a video on it also]] \\ | ||
| - | |Mighty Vac for sucking brake fluid from the master cylinder and out the bleeder screw. ((photos by cat5752 of the XLFORUM http://xlforum.net/forums/showthread.php?t=295754&page=2))|| | + | |Mighty Vac for sucking brake fluid from the master cylinder and out the bleeder screw. ((photos by cat5752 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/57107-simply-bleeding-the-front-brake/page2?t=295754&page=2))|| |
| |{{:techtalk:ref:tools:mighty_vac_1_by_cat5752.jpg?direct&250|}}|{{:techtalk:ref:tools:mighty_vac_2_by_cat5752.jpg?direct&400|}}| | |{{:techtalk:ref:tools:mighty_vac_1_by_cat5752.jpg?direct&250|}}|{{:techtalk:ref:tools:mighty_vac_2_by_cat5752.jpg?direct&400|}}| | ||
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| ===== Aquarium Pump ===== | ===== Aquarium Pump ===== | ||
