Pinion nut torque value...
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Joined: Sep 2007
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From: Lake Helen, Fl.
Pinion nut torque value...
Hi,
I'm new here. Found you'all while surfing the web looking for an answer to my topic.
My sons F-250 lost a pinion shaft bearing on his 10.5" Sterling. To make a long story short, the Haines manual that we were using said to use an inch pound torque wrench and check the torque value that it takes to turn the pinion before repair and apply that value to the repaired unit. But like I said the pinion bearing was toast. Can't rely on that method.
My question to you is does anybody have a proven method to properly adjust the pinion bearing preload? Thanks in advance.
Bobby Bananas!
I'm new here. Found you'all while surfing the web looking for an answer to my topic.
My sons F-250 lost a pinion shaft bearing on his 10.5" Sterling. To make a long story short, the Haines manual that we were using said to use an inch pound torque wrench and check the torque value that it takes to turn the pinion before repair and apply that value to the repaired unit. But like I said the pinion bearing was toast. Can't rely on that method.
My question to you is does anybody have a proven method to properly adjust the pinion bearing preload? Thanks in advance.
Bobby Bananas!
Elder User
Joined: May 2004
Posts: 749
Likes: 2
From: Phoenix, Az
You torque the pinion nut by rolling torque. There is a "crush" spacer that basically squashes in between the inner and outer bearing. There is some preload on those bearings. If you torque them like a normal nut/bolt, the bearings will be destroyed in short order. The spec for new bearings is 20 lb/in rotating torque. But this is measured without the ring gear installed. A max of 1 or 2 more lb/in will get you in the right area with the axle assembled, I would guesstimate.
One thing I would be sure to look at is the condition of the teeth on the ring gear. When you lose the pinion bearing, it can ruin the ring and pinion, as they don't like to be run out of proper "mesh" for very long, if at all.
One thing I would be sure to look at is the condition of the teeth on the ring gear. When you lose the pinion bearing, it can ruin the ring and pinion, as they don't like to be run out of proper "mesh" for very long, if at all.
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