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Old 01-24-2010, 07:22 AM   #1
NCFischers
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CHECK YOUR SHACKLES!!!!!

I was just doing some routine maintenance and checked the nuts on my recent wet bolt install. We took one trip for a total of 320 miles since we installed them. A few of the bolts were loose. When I installed them, I put the zerts toward the inside and the knurls didn't seat all the way into the shackles. They seated all the way on the trip and the nuts were loose. Keep checking all your wet bolts until they seat themselves and then keep checking them on a routine schedule.
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Old 01-24-2010, 08:12 AM   #2
richfaa
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Right... Checking those bolts are a maint requirement and is in the dexter manual. I never read the manual or did the maint and my bolts came loose causing a big repair bill and a trip delay. A passing trucker saved our butts by pulling us over.
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Old 01-24-2010, 10:00 AM   #3
H. John Kohl
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Jim,
Glad you caught it. Thanks for the reminder.
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Old 01-24-2010, 03:17 PM   #4
bob n pam
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We echo John, thanks, Jim, for the reminder.
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Old 01-24-2010, 03:32 PM   #5
Jay Bird
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I will check mine tomorrow. If I am correct they should be torqued to 35-40 lbs.
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Old 01-24-2010, 11:34 PM   #6
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They need to be tightened until the nut is snug against the shoulder of the bolt. Until the knurls seat themselves all the way, it's difficult to do that.
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Old 01-25-2010, 02:51 AM   #7
richfaa
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At the fall rally they said 60 lbs.
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Old 01-25-2010, 03:09 AM   #8
Pete Hanson
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Thanks for the reminder Jim. It's on the checklist now.
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Old 01-25-2010, 10:38 AM   #9
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I made sure my bolt heads were seated, then I tack welded the head to insure the bolt will not move or come out if the nut happens to loosen.
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Old 01-27-2010, 03:54 AM   #10
KathyandDave
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Is there some kind of tool that presses the bolts into the holes? Are the "knurls" and "grooves" called "splines"?
Also, I've noticed that the inside span of the hangers is greater than the width of the leaf springs, so to tighten the bolts there, one would have to deflect the hanger to touch the spring. Not a good idea, I'm thinking, so what do you do, put washers in between the hanger and the spring? Double nut the bolt and let the spring slide from side to side?
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Old 01-27-2010, 05:50 AM   #11
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Dave,
The bolts have shoulders on them so the nut will only go so far. Some of the shackles bent in slightly when I did the install but that has helped the knurls seat themselves. After a short trip (360 miles) all the bolts have seated. I tried beating on the bolts when I installed them but they would only seat 1/2 way.
Jim
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Old 01-27-2010, 06:28 AM   #12
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I received an email from Gary Wheeler of Morryde stating shoulder bolts need to be torqued to 40 lbs.
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Old 01-27-2010, 09:49 AM   #13
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Gary Wheeler is a great guy but he is a salesman.Call Ben Wiginton, he is the service manager.. They told us 60 at the rally.. Actually I think they said 40 to 60 but recommended 60... Did I hear right?????
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Old 01-27-2010, 11:55 AM   #14
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60 foot lbs is a wee bit high for that type of bolt, 7/16 fine. 40 to 45 is plenty even if they are of grade 8 strength. If the threads are stripped you then loose all reassurance of of what that nut and bolt is to provide.
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Old 01-27-2010, 01:36 PM   #15
Jay Bird
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The U bolts were to tighten to 60 lbs. I was told 40lbs for the schakles.
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Old 01-28-2010, 03:07 AM   #16
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Dexter specifies 30-50 for the wet bolts. Where you connect to the Morryde may be different, but it sounds like salesman Gary was in the ballpark
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Old 01-28-2010, 04:21 AM   #17
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From the dexter manual , page 59, that I never read and paid the price.

Suspension fastener torque value


3/8 U bolt Min 30 max 50
7/16 U bolt Min45 Max 70
1/2 U bolt Min 45 Max 70
9/16 U bolt Min 65 Max 95
5/8 U bolt Min 100 max 120
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Old 01-28-2010, 04:28 AM   #18
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I concur with Jaybird, from what information I have received. Can we get a consensus on that?
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Old 01-28-2010, 09:47 AM   #19
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Jaybird is correct on torque values.
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Old 01-29-2010, 04:09 AM   #20
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If Morryde says their specs say 40 why would you use dexters???
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