HarryBiron093 Posted 3 hours ago Share Posted 3 hours ago (edited) Guys, I am redoing the king pins on an RD 688 with a 20,000 lb front. I bought all Mack parts and everything thing went back together perfect until I went to grease the lower knuckle. As soon as I put grease to it it pushes the pins up wedging it. I have pulled it apart thinking I had the lip seal in upside down up it isn’t that. I have the slots lined up so grease should run right up the bushing. Any one seen this before ? Edited 3 hours ago by HarryBiron093 Quote Link to comment https://www.bigmacktrucks.com/topic/76277-king-pin-install/ Share on other sites More sharing options...
Joey Mack Posted 2 hours ago Share Posted 2 hours ago Im not sure what 'pins' you describe. The tapered king pin set up is excelent. Did you seat the king pin up into axle beam with a sledge and a jack on the bottom of the pin ? You also need to pre lube the thrust bearing and you use the lower nut to set the bearing. The front ends weight is on the thrust bearing. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76277-king-pin-install/#findComment-588197 Share on other sites More sharing options...
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