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techtalk:evo:oil01 [2024/02/06 00:37] hippysmack [Engine Oil Pressure and Testing] |
techtalk:evo:oil01 [2024/02/21 18:49] hippysmack [Wet Sumping / Sit Sumping] |
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| ===== Oil Check Valve (77-E87)===== | ===== Oil Check Valve (77-E87)===== | ||
| See [[techtalk:evo:oil01k#oil_check_valve_86-e87|Oil Check Valve (86-E87)]] in the Sportsterpedia. \\ | See [[techtalk:evo:oil01k#oil_check_valve_86-e87|Oil Check Valve (86-E87)]] in the Sportsterpedia. \\ | ||
| - | The Oil Check Valve is located behind the threaded filter adapter in the center of the oil filter mount. The filter adapter I.D. was enlarged on the filter end to accept the check valve. The check valve operation is dependent on receiving filtered oil (through the filter media) to lift the check valve cup and allow oil to pass. Therefore, a stopped up oil filter media condition (not allowing flow or enough flow) may not produce enough oil pressure to open the check valve before the filter bypass opens. \\ | + | The Oil Check Valve on 1986-E1987 engines is located behind the threaded filter adapter in the center of the oil filter mount. The filter adapter I.D. was enlarged on the filter end to accept the check valve. The check valve operation is dependent on receiving filtered oil (through the filter media) to lift the check valve cup and allow oil to pass. Therefore, a stopped up oil filter media condition (not allowing flow or enough flow) may not produce enough oil pressure to open the check valve before the filter bypass opens. \\ |
| - | **The oil pump check valve plays a role in the operation of the oil pressure switch**. \\ | + | **The oil pump check valve plays a role in the operation of the oil pressure switch**. \\ |
| + | It adds additional restriction in the feed path which raises the oil pressure in the chamber feeding the switch. \\ | ||
| |{{:techtalk:evo:oil:77-e87_oil_check_valve_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-e87_oil_check_valve_location_2_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:evo:oil:77-e87_oil_check_valve_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-e87_oil_check_valve_location_2_by_hippysmack.jpg?direct&300|}}| | ||
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| This reduction in pressure is also sensed by the oil pressure switch. When the pressure drops, the diaphragm eases back toward the closed position. If the pressure is low enough, the contacts will close or partially make contact while closing or intermittently opening and closing. The oil light will come on or flicker depending on the action of the contacts. \\ | This reduction in pressure is also sensed by the oil pressure switch. When the pressure drops, the diaphragm eases back toward the closed position. If the pressure is low enough, the contacts will close or partially make contact while closing or intermittently opening and closing. The oil light will come on or flicker depending on the action of the contacts. \\ | ||
| - | The pressure switch requires no back pressure from the engine to stay open. It opens solely from the pressure generated from the oil pump with the assistance of the check valve to hold some of that pressure in the pump. So, it is possible but not likely to have a stuck closed check valve with no oil light on. \\ | + | The pressure switch requires no back pressure from the engine to stay open. It opens solely from the pressure generated from the oil pump with the assistance of the check valve to hold some of that pressure in the pump. \\ |
| ===== Oil Check Ball (L87 and Up) ===== | ===== Oil Check Ball (L87 and Up) ===== | ||
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| | Check Ball (26437-86A) L87-91 \\ (replaced by (26437-86B) ) ((photo by Hippysmack)) | Check Ball (26437-86B) 92-Up ((photo by jordan1200 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196304-oil-filter-mount-and-check-valve?t=2072806)) | Check Ball and Spring Kit (33116-86A) for 86 -up Models ((photo by Hippysmack)) | | | Check Ball (26437-86A) L87-91 \\ (replaced by (26437-86B) ) ((photo by Hippysmack)) | Check Ball (26437-86B) 92-Up ((photo by jordan1200 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196304-oil-filter-mount-and-check-valve?t=2072806)) | Check Ball and Spring Kit (33116-86A) for 86 -up Models ((photo by Hippysmack)) | | ||
| - | ====== Wet Sumping / Sit Sumping ====== | + | |
| - | See article on [[techtalk:ref:oil10|Wet Sumping]] in the REF section of the Sportsterpedia | + | |
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