Torque Spec Primary Drain Plug
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Road Master
Joined: Jun 2006
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Torque Spec Primary Drain Plug
I noticed while reading through my owners manual today that the torque spec for the primary chain case drain plug calls for the same spec as the engine oil and the transmission. I know on my Dyna that I just traded it wasn't and I know that there were some issues due to improper torque spec and damaging internal parts due to too much torque. Does anyone know if what is printed in the owners manual is incorrect??
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,685
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From: Honah Lee
Your DANA maybe was like my 04 and had a 1/4 tapered thread pipe plug. The newer bikes have the same 1/2 straight thread MS o-ring seal port plug on all three drains. It torques on the face. The o-ring goes into the bevel. Does yours say 14-21 ft/lbs? I just run it up and bump it with my palm. I know my 08 Dana service manual has all three as the MS plug with the 14-21 ft/lbs. My 04 service manual has mine as a ms but I think it has an 03 cover on it with the tapered plug.
Last edited by Jackie Paper; Sep 14, 2018 at 11:07 AM.
Stellar HDF Member
Joined: Aug 2007
Posts: 2,052
Likes: 342
From: Virginia Beach
Your DANA maybe was like my 04 and had a 1/4 tapered thread pipe plug. The newer bikes have the same 1/2 straight thread MS o-ring seal port plug on all three drains. It torques on the face. The o-ring goes into the bevel. Does yours say 14-21 ft/lbs? I just run it up and bump it with my palm.
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