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Trucks, Trailers and Hauling for Shows

Hub Grease fittings

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Old 10-12-2013, 02:08:20 PM
ronny p 148 ronny p 148 is offline
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Default Hub Grease fittings

Two years ago gad to take a wheel off trailer to replace broken brake shoe springs and adjustment screw. I cleaned out bearings of old grease and refilled hub with many pumps of grease to fill bearing and hub. Centrifugal force forced grease out of rubber grease fitting cap made mess of rims. I noticed dry rotted rubber cap on one of hubs took cap off looks like it could use some grease. Only 1000 miles since last grease job . How many pumps of grease do the hubs need and after how many miles ?

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Old 10-12-2013, 04:18:25 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: Hub Grease fittings

Usually a hand packing of the bearings and a fingerfull in the cap is enough. Centrifical force will keep grease in the bearings for the duration. As long as the wheels are not submerged, usually a good quality grease will least a year. 1 pump once in a great while should be ebough to keep it fresh. Once a year, the bearings need to be cleaned out with kerosene, blown dry and be inspected for wear or chipping. If all good, hand repacked until grease comes out the back of the bearing clean, and then re-installed. Overfilling the bearing space is a killer of seals and is unessescary. Once grease blows out a seal, contaminants like water and road salts will quickly wipe out the bearings and possibly the hub as well.

If the wheel is submerged, especially if the hub is warm or hot, then the bearing should be removed and cleaned at the nearest opportunity. The new soap complex greases used on autos will turn into a caustic mess if subjected to water

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Old 10-12-2013, 09:23:40 PM
ronny p 148 ronny p 148 is offline
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Default Re: Hub Grease fittings

These bearings are not the type you pack by hand they have a grease fitting in hub cap with rubber cap that seals hub where grease fitting is.

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Old 03-26-2015, 01:13:34 AM
Charlie1925 Charlie1925 is offline
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Default Re: Hub Grease fittings

All wheel bearings are to be greased/packed by hand! I have packed bearings on jet airplanes, cargo airplanes, passenger airplanes, semi tractors & trailers, mobile homes, travel trailers, all types farm tractors/equipment ,cars, garden tractors and a whole lot of other stuff . Believe me when you pack the bearing,( you know that the dam thing is greased right. Don't lessen to this bull about greasing with A grease gun, they want you to have trouble so they can sell you a new BEARING /AXLE & HUB. THE GREASE GUN THING IS TO REGREASE AFTER A FEW HUNDRED MILES MAYBE A THOUSAND OR SO.

---------- Post added at 01:13 AM ---------- Previous post was at 12:47 AM ----------

also you jack up the axle/ wheel, grease slow ane you turn the wheel, that way you don't blow the seal, maybe 2 shots
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Old 03-26-2015, 04:50:56 AM
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Dale Barnett Dale Barnett is offline
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Default Re: Hub Grease fittings

I was always told that the grease fittings were used to push water out after submerging not to grease the bearings.
I have had trailers with grease fittings and always pulled apart and cleaned & regrease once a year and knock on wood have never had a bearing go bad.
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