Propshaft oil seal
Posted: Wed Sep 19, 2018 11:55 am
I have come across a V ring seal which appears to be possibly suitable for the propshaft on early non sealed gearboxes. I have fitted them instead of the thick polymer washer between the brass/bronze collar and the gearbox bearing. The seal is a tight fit on the shaft and the lip runs against the bearing face.
(Some bearing faces that I have seen have a groove across the face and obviously they are not suitable for use with this V ring seal. I suspect that these bearing are the same as the front bearing).
The advantage of these V ring seal is that unlike the thick polymer dirt seal, the lip is always in contact with the bearing face, whether the engine is running or in storage as the gap between the bronze bush and the bearing seems to be ideal for the seal.
I have used them on the early small 10/21 gearbox, but I suspect that they will also fit the bigger 10/35 gearbox. I cannot prove that they are an improvement, but they ought to reduce seepage during storage If nothing else. They are probably not as durable if the prop has a big tangle with some fishing.
I obtained some of these seals from Wych Bearings under part number V12A. They are about a £1 each depending on quantity, so they don't break the bank.
Jeremy
(Some bearing faces that I have seen have a groove across the face and obviously they are not suitable for use with this V ring seal. I suspect that these bearing are the same as the front bearing).
The advantage of these V ring seal is that unlike the thick polymer dirt seal, the lip is always in contact with the bearing face, whether the engine is running or in storage as the gap between the bronze bush and the bearing seems to be ideal for the seal.
I have used them on the early small 10/21 gearbox, but I suspect that they will also fit the bigger 10/35 gearbox. I cannot prove that they are an improvement, but they ought to reduce seepage during storage If nothing else. They are probably not as durable if the prop has a big tangle with some fishing.
I obtained some of these seals from Wych Bearings under part number V12A. They are about a £1 each depending on quantity, so they don't break the bank.
Jeremy