umodelnut Posted February 25, 2012 Share Posted February 25, 2012 in the center of my hubs on the front axle of my u model there is a white thing where oil or greace or something like that goes. is there supposed to be a cap over it? i knew on the earlier u models they had caps on the hubs but since mine was made in 1975 i dont think its sopossed to have them, thanks >>Vinny Quote Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/ Share on other sites More sharing options...
GreenGiant2 Posted February 26, 2012 Share Posted February 26, 2012 from your pic it looks like a oil cap. they should have 80-90 w oil in them.just put the same caps back on my brock.gg2hey what are the goodies in the back ground of the pic. Quote We the unwilling, Lead by the unqualified, are doing the impossible, for the ungrateful. Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/#findComment-104013 Share on other sites More sharing options...
umodelnut Posted February 26, 2012 Author Share Posted February 26, 2012 lots of mack cabs and parts. the cab over is a diamond reo. this was taken when we first bought it and it was still at doug fetterlys. Quote Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/#findComment-104014 Share on other sites More sharing options...
Joe Ditchkus Posted February 26, 2012 Share Posted February 26, 2012 If rubber caps were left off and water got in i would drain and flush old oil out. Use 9o wt. as others said or Lucas Hub Oil. Joe D. Quote Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/#findComment-104049 Share on other sites More sharing options...
Olivetroad Posted February 26, 2012 Share Posted February 26, 2012 If rubber caps were left off and water got in i would drain and flush old oil out. Use 9o wt. as others said or Lucas Hub Oil. Joe D.I am a fan of the Lucas hub oil - I have had it slow down a slight leak at the seal. You are supposed to be able to run with less oil in the hub - I don't know about that. Quote Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/#findComment-104053 Share on other sites More sharing options...
mike69mackman Posted February 27, 2012 Share Posted February 27, 2012 had a ch the shop replaced a front wheel seal but didnt tighten the oil hub completly oil leaked out on i81 in va. Nother driver gave me partial bottle and tightened cover, drove whole way back to pa with partially filled hub. Stuff works Quote Link to comment https://www.bigmacktrucks.com/topic/23474-u-model-hub-question/#findComment-104193 Share on other sites More sharing options...
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