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4 THE TOYZ

SoCal

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Posted: 08/05/08 02:23pm

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Thanks Map Guy...

2007.5 GMC 2500 CC Diesel-6"Pro Comp Lift 35" Toyo M/T, Air Lift w/on-board compressor + other mods
2009 Weekend Warrior LED3505
2007 Rhino 660 with several mods
2001 Honda TRX-90 (For the little one)

mapguy

Puget Sound

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Posted: 08/05/08 02:31pm

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4 THE TOYZ wrote:

So what is best for the pin box bolts????

Either one if torqued properly. Generally the failures you described come from fastners that are not properly torqued when installed. I probably would use GR 8 and make sure they are torqued down properly in progressive steps that reaches the ultimate torque value desired.

Map Guy

George H

Washington

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Posted: 08/05/08 02:37pm

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I used grade 8 when raiseing my pin box. You want bolts with a tight fitting shoulder, threads through the joint area do not hold up well.

George, Juanita and Mandie (boss Shar-Pei)
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4 THE TOYZ

SoCal

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Posted: 08/05/08 02:43pm

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Thanks for the info guys. So this leads me to, how do you find out what the correct torque is for your application??

mapguy

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Posted: 08/05/08 03:06pm

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4 THE TOYZ wrote:

Thanks for the info guys. So this leads me to, how do you find out what the correct torque is for your application??

Lippert PIN Box?
For OEM values/ bolts
Lippert

Morryde Pin Box Install PDF -has a small torque value chart for both GR5 and GR8 in the common PB bolt sizes. I would consider Morryde's info pretty safe to use as a guideline.

PDF

Another online referenceTorque Table

Map Guy

honda4us

SE, Wisconsin

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Posted: 08/05/08 03:51pm

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Use this chart to help, I always use a dry bolt with a lock nut on my hitches, never lost one yet. Grade 8 is my bolt of choice also.

bolt torque chart

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4 THE TOYZ

SoCal

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Posted: 08/05/08 04:03pm

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Thanks alot for all the info. It seems there is a fair amount of variation between the charts but atleast it gives me a guide. Thanks..

4 THE TOYZ

SoCal

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Posted: 08/05/08 04:28pm

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I just got ahold of the maker of my pin box which is a AL-KO/Sequent 21k. He said they recommend Grade 8 bolts at 110 pounds of torque. The 110 sounds really low compared to all of the charts you guys gave me. For grade 8, the average of the three charts was 204 pounds. Hmmm...

mapguy

Puget Sound

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Posted: 08/05/08 05:21pm

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4 THE TOYZ wrote:

Fifth Airborne or Sidewinder or combo of both PB?

What diameter are the bolts?

Fifth Airborne installation info suggests new GR8 bolts

1/2" Bolts torque to 110
5/8" Bolts torque to 160
3/4" bolts torque to 210

Retorque at 200 miles too.

PDF

Map Guy