| Author | Message | ||
| Larry Nelson (Larryn4106)
Registered Member Username: Larryn4106 Post Number: 54 Registered: 8-2008 Posted From: 173.30.186.230 Rating: N/A |
I have always had a pool of oil on the top of the spicer oil filter. I can only assume that I am loosing some oil while driving, based on what I see sitting on top of the filter (which is upside down, as you guys know). Today, I cleaned up the mating surface and before installing the new filter, I did what we do with aircraft filters, and that is put a little dow silicone on the rubber seal. Then....I chose NOT to tighten that sucker with a wrench, just by hand. I am thinking I am tightening that spicer oil filter too tight, and screwing up the rubber gasket. Is the oil pressure of the engine the same as what goes thru the spicer? | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 50 Registered: 1-2010 Posted From: 68.151.248.141 Rating: N/A |
Larry over tightening the filter can very defiantly cause the seal to be spit out. I usually just use a little fresh oil on the seal, bottom the threads then about another 1/2 turn. I don't know about the silicone but if it is sealant it will make getting that sucker off next time a real chore. If it is a lubricant like Dow 1-11 then it will have the same effect as smearing a bit of oil on the seal. Next time you have the filter off inspect the seal surface that mates to the rubber to make sure it is smooth. No burr. Also if you still have a leak have a look at the old seal to see if it has been damaged or has a flat spot on it. This would also indicate a problem on the mating surface. Just another thought. take a look above the filter housing to make sure that the oil is not leaking down from somewhere else. Good luck. I hate oil leaks! Les | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1165 Registered: 11-2005 Posted From: 173.202.21.210  Rating: N/A |
Larry, Spicers have their own oil pumps, it is built into the input shaft as I remember. That is the reason they don't use 90W gear oil. I didn't know the Spicer 4 sp had an oil filter? I haven't seen one on my 671 trans so I assume the 871 is different. I'm sure you have checked to make sure an old gasket is not stuck to the housing? That got me once after all these years!! Les, Dow silicone is nothing like silicone seal, it is more like grease. I hate oil leaks too but I have them at both ends of my 671 - just have to live with it since the cost to replace seals is awful. | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 51 Registered: 1-2010 Posted From: 75.156.157.30 Rating: N/A |
hey Gus I have used Dow products as part of my buisness for more than 25 years. Dow makes both a silicone sealent and a silicone lubracant. The best of the lube for rubber seals is # 1-11. It has the concistancy of tooth paste, comes in a green tube and doesn't cause rubber to swell. I don't remember the number for the sealant but believe me you don't want to try to take it off again. It makes standard silicone from the hardware store look like chewing gum. Larry is trying to stop a leak and if he was intending for Dow silicone sealant to stop the leak it might but if he just wanted to lube the new seal the 1-11 would do the job, Little over kill and expensive but what the heck, bus nuts are all made of money right? les | ||
| Larry Nelson (Larryn4106)
Registered Member Username: Larryn4106 Post Number: 55 Registered: 8-2008 Posted From: 173.30.186.230 Rating: N/A |
My Dow stuff is the "green tube" stuff and I have had this tube in my hangar for 6 years at least. Yes, I just wanted to lube the seal. I think the key this time is my hand tightening it. I guess we shall see. | ||
| Larry Nelson (Larryn4106)
Registered Member Username: Larryn4106 Post Number: 56 Registered: 8-2008 Posted From: 173.30.186.230 Rating: N/A |
I had to go look....it is Dow Corning 4. | ||
| Bob MacIsaac (Wildbob24)
Registered Member Username: Wildbob24 Post Number: 98 Registered: 5-2007 Posted From: 74.232.5.89  Rating: N/A |
Larry, The 4106 has an gear driven pump, running off one of the engine's rear accessory drives that circulates the oil through the filter and feeds the bearings and gears. The transmission oil is separate from the engine oil. The pump is rated at 50psi. Bob | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1171 Registered: 11-2005 Posted From: 173.202.39.9 Rating: N/A |
Les, I bow to your experience and wisdom. All I've ever used is the Dow Corning 4 Larry mentions for antenna bases and and various other aviation purposes. |