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techtalk:ih:oil03h [2021/11/07 03:45] hippysmack [Prior to installing the pump] |
techtalk:ih:oil03h [2021/11/07 04:57] hippysmack [Prior to installing the pump] |
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| This is normal maintenance for a gerotor type oil pump and should be done from time to time especially if you have no personal history with the oil pump. \\ | This is normal maintenance for a gerotor type oil pump and should be done from time to time especially if you have no personal history with the oil pump. \\ | ||
| If you just bought the bike or oil pump, never assume this has already been done by the P.O. or whoever you bought it from. \\ | If you just bought the bike or oil pump, never assume this has already been done by the P.O. or whoever you bought it from. \\ | ||
| + | If the pump has been in service for "years without problems", it's still a very good idea to pull the pump apart for inspection when you can. \\ | ||
| - | Make sure the internals match the pump housing and cover before installing a gerotor oil pump on an Ironhead. \\ | + | * Make sure the internals match the pump housing and cover before installing a gerotor oil pump on an Ironhead. |
| - | There were basically 2 different style oil pumps from 1977 to 1985; (1977-E1983 style and L1983-1985 style). \\ | + | * There were basically 2 different style oil pumps from 1977 to 1985; (1977-E1983 style and L1983-1985 style). \\ There were many part number changes for pump assemblies which mainly amounted to hose fitting changes although there were housing changes also. \\ But a big no-no is mixing internals of the two different styles of pumps without the knowledge of what the factory changes were. |
| - | There were many part number changes for pump assemblies which mainly amounted to hose fitting changes although there were housing changes also. \\ | + | * The part numbers are not cast or stamped into the oil pump or it's internals so you cannot match parts catalog numbers to a used oil pump. \\ |
| - | But a big no-no is mixing internals of the two different styles of pumps without the knowledge of what the factory changes were. \\ | + | * Rule of thumb (from the MoCo) on mixing gerotor oil pump internals: \\ Any 1977-1985 oil pump can be mated to 1977-1985 cases as a unit. Mixing internal parts gets a little tricky though. \\ 77-E83 gerotors can be used in L83-up pumps. L83-up gerotors can only be used in L83-up style pumps. \\ [[techtalk:ih:oil03a#late_1983_oil_pump_assembly_design_modification|Click Here]] to read more specific information on the L83 oil pump changes. \\ There are also pics of the chamfered and non chamfered gerotors on that page if you scroll the page. \\ |
| - | The part numbers are not cast or stamped into the oil pump or it's internals so you cannot match parts catalog numbers to a used oil pump. \\ | + | * There were 2 different outer separator plates (next to the feed gerotors) used from 77-85 with different IDs. \\ Each has it's own type gearshaft seal that must be used with it. \\ Each plate will fit any 77-85 oil pump as a set with it's specific seal (can't mix and match gearshaft seals). |
| - | Rule of thumb (from the MoCo): \\ | + | * One problem with assembling an IH gerotor pump is the roll pin in the oil pump housing. \\ The lower (outer) spacer plate has a slot cut into it that goes around that pin in the housing. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5798817)) \\ The spring pressure pushes this connection outward and with a loose cover, the outer plate will spin over the top of the pin. \\ If the plate rides on the end of the pin when the cover is installed then tightened down, this will lock the pump to the point of damage with the motor running. \\ Best to assemble the pump with duct tape until you get it mounted to keep the spacer from moving. \\ Else the pump can lock up once the bolts are in due to the washer not being sunk into the housing properly. |
| - | Any 1977-1985 oil pump can be mated to 1977-1985 cases as a unit. Mixing internal parts gets a little tricky though. \\ | + | |
| - | 77-E83 gerotors can be used in L83 and up pumps. L83 gerotors can only be used in L83 style pumps. \\ | + | |
| - | [[techtalk:ih:oil03a#late_1983_oil_pump_assembly_design_modification|Click Here]] to read more specific information on the L83 oil pump changes. \\ | + | |
| - | There were 2 different outer separator plates (next to the feed gerotors) used from 77-85 with different IDs. \\ | ||
| - | Each has it's own type gearshaft seal that must be used with it. \\ | ||
| - | Each plate will fit any 77-85 oil pump as a set with it's specific seal (can't mix and match gearshaft seals). \\ | ||
| - | |||
| - | One problem with assembling an IH gerotor pump is the roll pin in the housing. The lower (outer) spacer plate has a slit cut into it that goes around that pin. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?p=5798817)) \\ | ||
| - | The spring pressure pushes this connection outward and with a loose cover, the outer plate will spin over the top of the pin. \\ | ||
| - | If the plate rides on the end of the pin when the cover is installed then tightened down, this will lock the pump to the point of damage with the motor running. \\ | ||
| - | Best to assemble the pump with duct tape until you get it mounted to keep the spacer from moving. \\ | ||
| - | Else the pump can lock up once the bolts are in due to the washer not being sunk into the housing properly. \\ | ||
| ===== Gearshaft resistance ===== | ===== Gearshaft resistance ===== | ||
