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| techtalk:evo:oil03h [2018/12/21 05:12] – [Disassembly] hippysmack | techtalk:evo:oil03h [2024/01/05 03:40] (current) – hippysmack | ||
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| + | | 86-90 Oil Pump ((phoyo by Hippysmack)) | ||
| ====== Removal ====== | ====== Removal ====== | ||
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| * Disconnect the oil lines. | * Disconnect the oil lines. | ||
| * Remove the four mounting bolts and the pump should drop down. | * Remove the four mounting bolts and the pump should drop down. | ||
| - | * There is a flat spot on the frame just under the pump. ((IronMick of the XLFORUM | + | * There is a flat spot on the frame just under the pump. ((IronMick of the XLFORUM |
| * The complete pump assembly comes out as a unit. | * The complete pump assembly comes out as a unit. | ||
| - | * It´s not possible to take only the cover out because of the of limited space between the cover and frame. ((acb2 of the XLFORUM | + | * It´s not possible to take only the cover out because of the of limited space between the cover and frame. ((acb2 of the XLFORUM |
| - | * Its a tight squeeze but you can wriggle the pump out. ((russzx6 of the XLFORUM | + | * Its a tight squeeze but you can wriggle the pump out. ((russzx6 of the XLFORUM |
| ===== Pump Stuck to Engine Case ===== | ===== Pump Stuck to Engine Case ===== | ||
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| So the pump may be stuck to the engine case after the bolts come out. \\ | So the pump may be stuck to the engine case after the bolts come out. \\ | ||
| - | There are also times when a gasket could not be found, so RTV or other sealers were used in addition to or instead of a gasket. ((Farmer00-1 of the XLFORUM | + | There are also times when a gasket could not be found, so RTV or other sealers were used in addition to or instead of a gasket. ((Farmer00-1 of the XLFORUM |
| Either way, if gasket sealer was applied, expect that to make it more difficult to remove the pump from the engine. \\ | Either way, if gasket sealer was applied, expect that to make it more difficult to remove the pump from the engine. \\ | ||
| * First, be patient with it. | * First, be patient with it. | ||
| - | * Try to turn the motor over by hand. It may push the pump out. ((Jason' | + | * Try to turn the motor over by hand. It may push the pump out. ((Jason' |
| * Try a rubber mallet. | * Try a rubber mallet. | ||
| * Gently tap down on the pump's rear side so you're not forcing extra pressure against the drive gear on the pinion shaft. | * Gently tap down on the pump's rear side so you're not forcing extra pressure against the drive gear on the pinion shaft. | ||
| * Try a short piece of 2x4 to gently tap on the pump. | * Try a short piece of 2x4 to gently tap on the pump. | ||
| * Try using a crowbar with a " | * Try using a crowbar with a " | ||
| - | * It's a wood working tool for pulling nails. ((123456qwerty of the XLFORUM | + | * It's a wood working tool for pulling nails. ((123456qwerty of the XLFORUM |
| ===== Gasket Removal ===== | ===== Gasket Removal ===== | ||
| There are several ways to remove a stuck gasket. \\ | There are several ways to remove a stuck gasket. \\ | ||
| - | The use of metal abrasives on aluminum mating surfaces can result in distortion of the surface and a possible leak thereof. \\ | + | The use of metal abrasives on aluminum mating surfaces can result in distortion |
| A straightedge razor blade can cut ruts in the surface guaranteeing a leak. \\ | A straightedge razor blade can cut ruts in the surface guaranteeing a leak. \\ | ||
| Plastic scrapers and elbow grease is good alternative. \\ | Plastic scrapers and elbow grease is good alternative. \\ | ||
| Soaking the gasket with a solvent will soften it somewhat so removal is easier. \\ | Soaking the gasket with a solvent will soften it somewhat so removal is easier. \\ | ||
| - | However, the outer plate seal will have to be replaced before reinstallation. \\ | + | However, the outer plate and cover seals will have to be replaced before reinstallation. \\ |
| You may have to soak it and scrape several times while removing gasket layers. \\ | You may have to soak it and scrape several times while removing gasket layers. \\ | ||
| Below PB Blaster was used with an auto window scraper. ((photos by Hippysmack)) \\ | Below PB Blaster was used with an auto window scraper. ((photos by Hippysmack)) \\ | ||
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| ===== Stuck Cover Gasket ===== | ===== Stuck Cover Gasket ===== | ||
| The spring washer inside the pump puts a lot of tension against the cover. \\ | The spring washer inside the pump puts a lot of tension against the cover. \\ | ||
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| So, it is common for the cover to be stuck to the pump body. \\ | So, it is common for the cover to be stuck to the pump body. \\ | ||
| - | According to the FSM, the pump to case mounting gasket | + | As mentioned above, the pump to case mounting gasket |
| This is a debatable procedure as many have reported that is not necessary. \\ | This is a debatable procedure as many have reported that is not necessary. \\ | ||
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| * However, a 24 hour soak will help to soften the gasket / sealer and make it easier to break free. | * However, a 24 hour soak will help to soften the gasket / sealer and make it easier to break free. | ||
| - | | Carburetor Cleaner ((photo by Hippysmack | + | | Carburetor Cleaner ((photo by Hippysmack |
| - | |{{:techtalk: | + | |{{techtalk: |
| * After soaking, open the lid, remove the small bucket inside by the handle, set the bucket on the ground and wash the parts cleaner off with a water hose. | * After soaking, open the lid, remove the small bucket inside by the handle, set the bucket on the ground and wash the parts cleaner off with a water hose. | ||
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| This oil pump had to be soaked overnite before the cover would separate from the body. \\ | This oil pump had to be soaked overnite before the cover would separate from the body. \\ | ||
| - | | Cleaning and soaking gaskets for more easy removal ((photos by Hippysmack | + | | Cleaning and soaking gaskets for more easy removal ((photos by Hippysmack |
| - | |{{:techtalk: | + | |{{techtalk: |
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| ====== Disassembly ====== | ====== Disassembly ====== | ||
| + | Wiggle the cover off and the feed gerotors are exposed. \\ | ||
| + | Once you've gotten the cover off, you can continue to disassemble the pump from here. ((photos by Hippysmack)) \\ | ||
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| + | Holding the pump upside down will allow you to remove and inspect parts individually as you go. \\ | ||
| + | It also helps to keep from dropping and losing some of the small parts. \\ | ||
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| + | Inspect the parts for damage and wear while removing them. \\ | ||
| + | This can help diagnose certain areas for further inspection that might otherwise be looked over. \\ | ||
| - | |Wiggle | + | * Check for excessive scratching of the cover where the feed gerotors sit as well as the top and bottom of the feed gerotors. |
| + | * The feed gerotors are normally ' | ||
| + | * When the cover comes off, they can be slid off the gearshaft. | ||
| + | * The pin in the gearshaft sticks out into the square recess in the inner gear but doesn' | ||
| + | * The outer plate is held in place by a solid pin in the gearshaft. \\ | ||
| + | * It's a loose fit in the hole in the gearshaft and it's held in place by tension of the spring washer between the plates. | ||
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| + | * Push in on the outer plate (if needed) to compress the spring and the pin can be removed with pliers or your fingers. | ||
| + | * Then the outer plate can be removed. | ||
| + | * The notch in the plate mates around the roll pin in the body that keeps it from rotating. | ||
| + | * It'll have to be lifted straight out or dumped out. | ||
| + | * Check the position and condition of the outer plate seal before removing it. | ||
| + | * It is pressed into the outer plate. | ||
| + | * Check the fit around the gearshaft. It should be a snug fit and sitting horizontal to the gearshaft. | ||
| + | * If not, this could easily contributed to wet-sumping in the engine. | ||
| + | * Then remove the spring washer. | ||
| + | * The inner plate is held in by the retaining ring. | ||
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| + | * The outer plate seal will need to be pressed or pried out. | ||
| + | * You can set up a rig as in below (bearing race, a small socket and a rubber hammer). | ||
| + | * Make sure the socket is slightly smaller than the outer plate I.D. | ||
| + | * Gently tap the socket. | ||
| + | * And the seal will fall thru the bearing race (or larger socket etc). | ||
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| + | * Two small drivers were used here (1 to keep the ring from spinning, 1 to raise an end out of the groove in the gearshaft). | ||
| + | * The 1st screwdriver can be pushed into the slot in the gerotor to keep the ring from spinning. | ||
| + | * This will allow you to pick and out on one end and then switch back and forth between the two from there. | ||
| + | * Remove the retainer clip. | ||
| + | * Then pull out the inner plate. | ||
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| + | * Inspect the roll pin in the pump body for straightness and damage. | ||
| + | * The return gerotors are also normally ' | ||
| + | * Turn the pump over and dump them out enough to get your fingers on them. \\ (being careful not to loose the second pin in the gearshaft) | ||
| + | * Inspect the area at the pump bore where the pin contacts it for damage. \\ | ||
| + | * Also, make sure the pin is sitting on the outside of the bore surface instead of inside the bore. \\ | ||
| + | * The second pin holds and keeps the gearshaft from coming out. | ||
| + | * Use a pair of needle nose pliers to remove it from the gearshaft. | ||
| + | * Hold the gearshaft with the other hand to keep it from falling when pulling this pin. | ||
| + | * Else, it could fall out and damage the teeth on the gear. | ||
| + | * Inspect the return gerotors and their mating surface in the pump body for scratches / damage. \\ | ||
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| + | * Remove the gearshaft and set it in a safe place to protect the gear teeth. | ||
| + | * Clean all parts with solvent (brake cleaner works well). | ||
| + | * With the parts spread out you now can now do further inspection on areas noticed while disassembling. | ||
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