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techtalk:ih:oil03 [2019/02/28 13:36] hippysmack [Production Oil Pumps] |
techtalk:ih:oil03 [2019/12/04 00:26] hippysmack [Sub Documents] |
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In 1972 and with the birth of the 1000cc engine, the pump numbers were -72. \\ | In 1972 and with the birth of the 1000cc engine, the pump numbers were -72. \\ | ||
It had larger gears and a bigger breather slot. \\ | It had larger gears and a bigger breather slot. \\ | ||
+ | ** | ||
+ | Some pump gear data from kitabel**: ((kitabel of the XLFORUM http://xlforum.net/forums/showthread.php?p=5792413#post5792413)) \\ | ||
+ | The pitch distance of 14 & 16 tooth pumps is not the same. \\ | ||
+ | All driven and idler gears have .422" ID center holes. \\ | ||
+ | 14 tooth gears (1952-61) are .970" OD. \\ | ||
+ | All feed gears are .217" thick. \\ | ||
+ | All return gears are .360" thick. \\ | ||
+ | 16 tooth gears (1962-76, also all 45 & UL return pumps) are 1.115" OD. \\ | ||
+ | 1962-71 feed are .185" thick. \\ | ||
+ | 1962-71 return .375" thick. \\ | ||
+ | 1972-76 return .398" thick. \\ | ||
+ | 45 & UL 1937-73 return .315" thick. \\ | ||
+ | Inspect your spares and purchases carefully - 1936-* OHV BT gears are 14 tooth, but .990" OD and only the driven gears have .422" ID hole (the idlers are .342"). \\ | ||
+ | |||
====== XR-750 Oil Pumps (only) ====== | ====== XR-750 Oil Pumps (only) ====== | ||
* From 1972 to 1989, the gear driven oil pump went through several changes. | * From 1972 to 1989, the gear driven oil pump went through several changes. | ||
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* Each plate will fit any 77-85 oil pump as a set with it's specific seal. | * Each plate will fit any 77-85 oil pump as a set with it's specific seal. | ||
* See "77-85 Oil Pump Parts Lists and Upgrades" above for the complete list and years for all the changes. | * See "77-85 Oil Pump Parts Lists and Upgrades" above for the complete list and years for all the changes. | ||
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+ | {{:techtalk:ih:oil:oil_line_routing_3_by_hopper.jpg?direct&300|}} ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=209347&page=10)) \\ | ||
|{{:techtalk:ih:oil:77_style_oil_pump_by_2_ironheadjunkie.jpg?direct&300|}}|{{:techtalk:ih:oil:77_style_oil_pump_by_1_ironheadjunkie.jpg?direct&300|}}|{{:techtalk:ih:oil:77_oil_pump_parts_by_northern_bobber.jpg?direct&300|}}| | |{{:techtalk:ih:oil:77_style_oil_pump_by_2_ironheadjunkie.jpg?direct&300|}}|{{:techtalk:ih:oil:77_style_oil_pump_by_1_ironheadjunkie.jpg?direct&300|}}|{{:techtalk:ih:oil:77_oil_pump_parts_by_northern_bobber.jpg?direct&300|}}| | ||
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|{{:techtalk:ih:oil:79_style_oil_pump_1_by_peteroo.jpg?direct&300|}}|{{:techtalk:ih:oil:79_style_oil_pump_2_by_peteroo.jpg?direct&300|}}|{{:techtalk:ih:oil:79_style_oil_pump_3_by_peteroo.jpg?direct&300|}}| | |{{:techtalk:ih:oil:79_style_oil_pump_1_by_peteroo.jpg?direct&300|}}|{{:techtalk:ih:oil:79_style_oil_pump_2_by_peteroo.jpg?direct&300|}}|{{:techtalk:ih:oil:79_style_oil_pump_3_by_peteroo.jpg?direct&300|}}| | ||
| 79 Oil Pump ((photo by Peteroo of the XLFORUM http://xlforum.net/forums/showthread.php?t=2070085)) ||| | | 79 Oil Pump ((photo by Peteroo of the XLFORUM http://xlforum.net/forums/showthread.php?t=2070085)) ||| | ||
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+ | ====== Priming the Oil Pump ====== | ||
+ | A dry pump won't pump oil. \\ | ||
+ | It will 'cavitate' when their is not a hydraulic seal between the gerotors and the inlet hose from the tank. \\ | ||
+ | |||
+ | Any time you have removed the oil pump or the removed / drained the feed hose from the oil tank, the pump needs to be primed. \\ | ||
+ | * The oil pump needs to be primed with oil / lube before it can transfer oil from the inlet to the outlet cavity inside. | ||
+ | * Prime the oil pump per the FSM; | ||
+ | * Upon removal / inspection, oil the pump internals. | ||
+ | * Remove the oil pressure switch and rotate the engine until oil comes out the end of the pump and reinstall the switch. | ||
+ | * If you let it sit long enough, oil will gravity drain inside the pump and prime it. | ||
+ | * Another way to prime the pump is to use assembly lube on the gerotors and inside of the pump before installing it. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=4805186#post4805186)) \\ Then you have an instant hydraulic seal to help the oil pump suck oil from the hose. | ||
+ | * You can also using a large syringe with a tapered tip inserted into the oil supply hose on the bottom of the oil tank. ((ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?p=5751479#post5751479)) \\ Then you can force feed oil the pump and on to the engine using this technique and it avoids having to mess with the sending unit. | ||