![]() ![]() Square oil tank used on 1965-1984 panhead and shovelhead has return line fitting in filler neck located in top center of oil tank vent fitting is slightly forward of return fitting. ![]() Main exception is with oil tanks with “in tank” oil filter. These fittings are for oil return and vent lines, and in most cases may be used interchangeably. Fittings may enter through upper area of tank or connect to fittings near bottom that are attached to standpipes inside tank. In horseshoe-type oil tanks, two fittings nearest front of oil tank are identical. Return circuit delivers oil from return fitting in oil pump cover (See Pictures 6 & 7), through oil filter and cooler (if applicable), to return fitting in oil tank. With motorcycle in upright position, oil will flow out supply line fitting. To distinguish oil tank’s supply fitting from vent and return fittings, remove oil lines and pour small amount of oil into tank. In Harley-Davidson® DynaĪnd other models with oil tank below transmission, supply line exits oil tank on bottom of primary drive side, then crosses to cam side and connects with supply fitting on oil pump cover. In motorcycles with oil tank located above transmission, supply fitting in oil tank is almost always located on bottom of tank at center or rear. Supply circuit delivers oil from tank to supply fitting of oil pump cover. 1965-1984 models often utilize a fourth circuit for primary chain oiling. After installation and filling oil tank remove the feed line to the oil pump and purge all air.Most big twin oiling systems utilize three oil circuits: supply, return, and breather/vent. Filter to tank via return line to pump back to tank. Can anyone verify this is the correct oil line diagram. Hello i need a diagram of oil lines on a 1988 hd softail custom ive look at. How big is the oil line on a 1988 HD Softail? Shovelhead oil line routing free#Get free help, advice & support from top Harley.40 Micron – H-D Part #A (standard Evo filter) Oil Lines – The oil lines connecting the Smart Pump to the oil filter operate under high pressure and are colored RED in the diagram. Ask your Harley Davidson oil flow diagram questions. ![]() Harley Davidson oil flow diagram related problems. What are the oil lines on a Harley Davidson? Remove the check valve ball with a mechanic’s magnet from inside the oil pump body. Remove the check valve O-ring and spring by hand. Remove check valve cover screw with a flat head screwdriver. Wait until you see a steady flow of oil the attach.Ĭonnect feeder and return lines. After starting the engine look into the tank to verify oil movement. I am using a softail horseshoe tank and running a 93 evo motor. Is there any reason not to put a different spring in my oil pump. The evolution’s external filter requires two oil lines one line feeds. The design of the oil filter on the shovelhead uses one oil line, which feeds the oil back through the filter and into the oil tank. Routing the oil lines from the oil tank to the engine is simple task. How are oil lines routed in a Harley Evo? Learn new techniques and tips from friendly experts. Sign up for premium membership and get access to our best Harley repair videos and step-by-step instructional projects. How can I repair my oil pump on my Harley? We are upgrading the cams and and hydraulic cam plate in our next steps. Shovelhead oil line routing how to#Step by step video on how to install the upgraded Harley-Davidson Twin Cam oil pump. How to install a twin cam oil pump on a Harley? ![]()
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