|
09-13-2020, 09:37 PM
|
#1
|
Junior Member
Join Date: Jul 2020
Location: Phoenix
Posts: 27
|
5th wheel to Truck bed rails
My Curt hitch states min of 5 1/2 “ between the rig and my truck bed rails. I have the hitch as high as it goes and I have 5” clearance. Do I really need to adjust the king pin or do something else to get the additional 1/2”?
|
|
|
09-13-2020, 10:22 PM
|
#2
|
Senior Member
Join Date: Apr 2012
Location: Portland, OR
Posts: 4,222
|
Lower the pin box!
__________________
Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360
Visit and enjoy Oregon State Parks
|
|
|
09-14-2020, 02:55 AM
|
#3
|
Senior Member
Join Date: Oct 2014
Location: Germantown, TN
Posts: 6,331
|
Yep, what Russ said. And 6" is even better than 5 1/2". When you lower the pin box, be sure to buy new grade 8 bolts, nuts and washers.
__________________
Jim in Memphis, Wife of 51 years is Brenda
2019 F450 6.7 Powerstroke
2018 Mobile Suites 40RSSA
2021 40' Jayco Eagle
2001 Road king w/matching Harley sidecar
2021 Yamaha X2 Wolverine 1000
|
|
|
09-14-2020, 03:26 AM
|
#4
|
Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
|
Quote:
Originally Posted by notanlines
Yep, what Russ said. And 6" is even better than 5 1/2". When you lower the pin box, be sure to buy new grade 8 bolts, nuts and washers.
|
We have re used the bolts and washers for years without any failures. You do need to torque the nuts to about 350 lb ft. We also push up on the pin box as we tighten them.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
|
|
|
09-14-2020, 06:43 AM
|
#5
|
Senior Member
Join Date: Dec 2018
Location: grand rapids
Posts: 596
|
never heard of 350 pounds on torque.
here are the torques per etrailer.
Pin box bolt torque is based on the size of the bolts.
1/2 inch Bolts GR5 90 ft-lbs
5/8 inch Bolts GR5 150 ft-lbs
3/4 inch Bolts GR5 275 ft-lbs
|
|
|
09-14-2020, 08:50 AM
|
#6
|
Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,996
|
Quote:
Originally Posted by Roscommon48
never heard of 350 pounds on torque.
here are the torques per etrailer.
Pin box bolt torque is based on the size of the bolts.
1/2 inch Bolts GR5 90 ft-lbs
5/8 inch Bolts GR5 150 ft-lbs
3/4 inch Bolts GR5 275 ft-lbs
|
These are the torques per Lippert:
A. Torque 1/2” bolts to 110 ft-lbs minimum.
B. Torque 5/8” bolts to 160 ft-lbs minimum.
C. Torque 3/4” bolts to 210 ft-lbs minimum.
Page three of this document: https://lci-support-doc.s3.amazonaws...cd-0001721.pdf
Depending on where you get your instructions, which grade bolt you use (5 or 8) the torque values will change. There is also a torque variance depending on whether the threads are lubricated, zinc plated/dry or unplated/dry: https://www.fastenal.com/content/fed...0Gr8%20Gr9.pdf
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
|
|
|
09-14-2020, 09:12 AM
|
#7
|
Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
|
I may have had the wrong information, my point is they need to be TIGHT. Your not going to get that with a standard 1/2 drive ratchet.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
|
|
|
09-14-2020, 09:27 AM
|
#8
|
Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,751
|
Quote:
Originally Posted by chuckster57
I may have had the wrong information, my point is they need to be TIGHT. Your not going to get that with a standard 1/2 drive ratchet.
|
At least a "moderate grunt"!
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
|
|
|
09-14-2020, 09:35 AM
|
#9
|
Senior Member
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,034
|
You can't just throw out a torque value without stating what the conditions are: dry, zinc plated and dry, or plain and dry.
See if this link to Fastenal's values will open for you.
Note the notes at the bottom of the table regarding the "K" values and conditions.
https://www.fastenal.com/content/fed...0Gr8%20Gr9.pdf
Edit add: John beat me to it and I didn't see it.
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
2023 CanAm Defender SXS
|
|
|
09-14-2020, 09:39 AM
|
#10
|
Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,690
|
Quote:
Originally Posted by flybouy
At least a "moderate grunt"!
|
Well, when I tried to tighten the ball nut on my hitch to 350lbs. with about a 36" long 3/4" drive ratchet and my feet shoving against the garage door frame, my body too made some strange "noises" but I don't know that I would call them a "grunt".....
__________________
Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
|
|
|
09-14-2020, 10:39 AM
|
#11
|
Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
|
Geez... I guess it’s my day to get ragged on.
No big deal, as long as I get a break in the next couple days.
I honestly don’t remember where I got that number from, it’s been a few years and a few pin boxes ago.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|