Oil pump details:
1 - pump housing; 2 - cover; 3 - mesh filter; 4 - cover; 5 - driving and driven gears of the pump; 6 - pump roller; 7 - pressure reducing valve; 8 - plunger; 9 - spring; 10 - oil filter bracket; 11 - stuffing box; 12 - bypass valve; 13 - oil filter; 14 - oil dipstick tube.