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| techtalk:ih:oil03q [2024/05/07 04:45] – hippysmack | techtalk:ih:oil03q [2024/05/07 20:49] (current) – [Damaged Pump Housing Roll Pin] hippysmack | ||
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| - | ====== Damaged Pump Hosing Roll Pin ====== | ||
| - | **The roll pin in the oil pump housing can shear or pull out**. | ||
| - | This may be due to foreign matter in the feed or return cavities. Or the pin can be damaged from trying to remove it. \\ | ||
| - | The gerotors are already under pressure due to the spring washer design between the inner and outer divider plates. \\ | ||
| - | The hole in the center of the divider plates is off center. The roll pin locates the plates. \\ | ||
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| - | Any foreign objects that enter the pump can increase the pressure against the plates to move. \\ | ||
| - | Any increased pressure may be enough to grab and spin the plate(s) hard enough to damage the pin or knock it out of it's hole in the housing and/or break the area of the hole for the pin. If the roll pin comes out, it will cause damage to the oil pump. If it gets lodged between the inner and outer gerotors, it'll most likely crack the outer piece (weaker of the two pieces). If it gets under the gerotors, it'll get dragged across the gerotor surface in the pump housing or cover. This will end up in scratches on the machined surface and lower oil pressure from the pump due to the scratches. With the roll pin out, the outer plate, under pressure, can spin and wallow out the feed bore in the housing around the plate. \\ | ||
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| - | Possible ways to remove the roll pin. \\ | ||
| - | - You could try running a small tap into the roll pin to cut threads for a small screw, then screw the bolt into the center. \\ Once the bolt hits bottom of the hole, it may push the pin up and out or at least loosen the pin. ((Andy Hog of the XLFORUM https:// | ||
| - | - This is tedious but would work, if done properly. \\ This method may also be used if the existing hole is broken out or the is wallowed to where a new pin would not tighten up to the existing hole. You could carefully cut the old pin flush with a Dremil tool, leave the old pin where it is and install a new pin elsewhere. | ||
| - | * First, remove the guts inside and install both divider plates over the old pin to locate them properly. Then drill a small hole (correct bore size for new pin) thru the top plate, thru to the bottom plate and stop when it is dimpled by the drill bit. Remove the plates and finish drilling the second plate. | ||
| - | * Reinstall both plates and drill thru the new hole in both to make a dimple in the pump housing, remove plates. | ||
| - | * Drill hole in pump housing to depth of new pin. | ||
| - | * Use a metal cutting blade on a Dremil cutting tool to cut the old pin flush with the " | ||
| - | * Blow out the new hole with compressed air, press the new roll pin into the new hole and you're done. | ||
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| - | The roll pin below was removed using electrical side cutters by XLF member, billeuze. ((https:// | ||
| - | Carefully protect the base and sides of the pump body. \\ | ||
| - | Odd parts were put inside the pump for a nice height for a fulcrum for the side cutters. \\ | ||
| - | I squeezed and pried it out. It took 4 or five pries to walk it all the way out. ((photos by billeuze)\\ | ||
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