The primary case has the clutch, compensator, primary chain and is an oil bath system. A push rod goes all the way through the hollow main shaft and it engages and disengages the clutch basket. The main shaft of the transmission extends all the way over to the primary side (right side). To help with the pressure, Harley designed a breathing transmission which is why you'll see the vent hose on the top of your transmission. When the gears are turning, air and oil get blended and mixed around covering everything, and pressure is created. There are two shafts in the transmission, the main shaft and the countershaft, both having 6 gears. This has been a frustrating issue for Harley over the years because it doesn't happen to all of their motorcycles. This is normal and it's only when larger amounts are transferring that causes issues. Understand, there will always be a small amount of Harley oil transfer between the transmission and primary cases (small amounts-2 oz or so). SUPPORT US AND SHOP IN THE OFFICIAL LAW ABIDING BIKER STORE Of course, a transmission with low or no oil will certainly fail and need to be repaired or completely replaced. This eventually leaves the transmission very low on oil and the primary with too much oil. Harley oil transfer is when oil moves over from the transmission into the primary case. Introduction to the Harley oil transfer problem:
Also, learn about the Harley Milwaukee-Eight “Oil Sumping” Problem here!.I try and keep it fairly basic and easy to understand. In this written article below are just the highlights.
#Harley transmission and primary oil how to
Listen in to this entire podcast episode to learn what it's all about and how to diagnose it.
#Harley transmission and primary oil download
Podcast: Play in new window | Download | Embedįor some time Harley-Davidson has had an oil transfer or migration problem on certain touring models and they are still trying to figure it out.
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