Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-23-2013, 09:41 PM   #29
Rivet Master
 
dbj216's Avatar

 
1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,121
I've got another 250 miles towing today with the Master stainless steel pin and no obvious bends or wear. Maybe I had junk steel shank pins that bent. I hate thinking about my 8000 pound trailer and my 8000 pound truck connected with a piece of junk steel 5/8" diameter pin, even if it is in sheer. Because of all the slop, it sees bending loads too.

Thanks for your suggestion Robert. And the Anderson aluminum sleeve idea looks promising too for eliminating some of the slop between receiver and 2" Propride.

We are parked along the Columbia River in Boardman, OR. Pretty river, but the terrain not so much. Hot, windy, barren.

The Propride pulls the Airstream nicely. It is a very nice hitch.

David
__________________

__________________
dbj216 is online now   Reply With Quote
Old 08-24-2013, 12:00 AM   #30
Rivet Master
 
mefly2's Avatar
 
2015 25' FB Eddie Bauer
Western , ** Big Sky Country ** Montana
Join Date: Feb 2010
Posts: 2,283
That does not look like a receiver shank pin ... we used pins like that on our snow plow. Try a new "hardened" pin and see if that takes care of the problem. A welder can put a bead on your oval hole and then you can round it with a file (likely it will be too hard to drill after welding). But you will still need to address the "slop" in adapter to receiver fit. Drill a small secondary hole to fit a locating bolt to keep your adapter in position if you don't want to have it welded in place...do you really need the larger capacity (pintle, or...)?
__________________

__________________
mefly2 is offline   Reply With Quote
Old 08-24-2013, 02:20 AM   #31
Rivet Master
 
ROBERTSUNRUS's Avatar

 
2005 25' Safari
Salem , Oregon
Join Date: Mar 2006
Posts: 7,266
Images: 18
Blog Entries: 51
Quote:
Originally Posted by dbj216 View Post

I want to tow safely. I need to find a solution to all the stress I see on my shank pin. If I am the only guy in the world with bent shank pins, then I need to find the cause and correct it. I was hoping someone else had already solved this problem

David
Hi, I bought my new trailer in Oregon and towed it home to Southern California. On this one way trip home my Master-Lock shank lock was bent. I decided that the reason it was bent was because it was a dual purpose lock with a sleeve on a 1/2" shaft to make it fit a 5/8" hole. I replaced it with a one piece solid 5/8" lock and have been OK for almost nine years now. Not related to your story, but you aren't the only one with a bent hitch pin/lock.
__________________
Bob

2005 Safari 25-B
"Le Petit Chateau Argent"
[ Small Silver Castle ]
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
ROBERTSUNRUS is offline   Reply With Quote
Old 08-24-2013, 05:56 AM   #32
Rivet Master
 
Florida 55's Avatar

 
2008 27' Safari FB SE
Pfafftown , North Carolina
Join Date: Jul 2010
Posts: 821
Images: 38
Blog Entries: 4
Quote:
Originally Posted by dbj216 View Post
I'm hitching up for a 4 week trip out west. I noticed my shank pin was quite bent. I'm concerned.

I have a new F350 Super Duty and a new ProPride hitch. I have towed about 3000 miles with this set up and like it. I have the 1400 lbs weight distribution bars cranked up 7" measured from the base of the BAL jacks. My fender well measurements and weight scale readings are reasonable.

The direction of the bend is verticle based on the way I position my shank pin. It is as if there is a huge upward force on the shank pin causing it to bend.

The F350s come with a Cat V hitch receiver and a sleeve reducing it from 2.5 inches down to the 2 inch Cat IV. The sleeve has a 11/16 by 7/8 oval hole in it meaning the 9/16 diameter shank pin does not touch the sleeve. So the weight distribution force is supported by the outer holes in the hitch receiver.

I don't like the oval hole in the Ford sleeve reducer. It creates a 2.5 inch distance between support areas for the shank pin. I wonder if anyone else has discovered this unusual wear?

David
To reduce the slop using the Ford reducer with my factory class V hitch (2011 F-250) I wrapped a piece of black duct tape around the reducer. Since then it has fit snug with no slop.
__________________
Chuck
Airstream - 2008 Safari 27FB SE (Sweet Pea)
TV - 2011 Ford F250 Lariat, 6.7 Diesel, 4X4 (Brutus)
TAC FL-55 | WBCCI 3823 - Unit 12 | AIR 48265
Florida 55 is offline   Reply With Quote
Old 08-24-2013, 09:18 PM   #33
Rivet Master
 
dbj216's Avatar

 
1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,121
Missoula is a very nice city. The KOA there is awsome. The Lolo canyon wildfile is not so neat. We had to tow around the fire as hiway 12 was closed. All of our towing so far has been into a strong west headwind. My luck. Averaging 12 mpg.

Doing some checking I find 1020 low carbon steel yield stress is 50,000 lbs. Assuming the 5/8 (.625) diameter pin is supported only by the Ford receiver holes, it would take only a 2000 pound load applied to the center of it to deflect the pin spanning 2.5 inches. I believe the deflection is happening while the hitch assembly rotates, or twists when I go up an entrance ramp, say to a fuel station. The only thing stopping the rotation is the pin due to all the slop in the assembly (big holes = .050 slop, large clearances in the reducer sleeve = .140 slop.) I find the pin is bent upward according to how I install the pin in my hitch. The loaded spring bars keeps the pin from changing position after I hitch up.

Certainly angle rotation, and pulling from a stop, or pulling up a hill puts a big load on the shank pin. Low grade steel and lots of slop caused my pin to bend. The new Master stainless steel pin after 900 miles of towing is straight. I think straight is better than bent!

Cold rolled steel is 90,000 psi, and hardened steel is 200,000 psi yield stress. These are much stronger materials than 1020 hot rolled at 50,000 psi. Better steel makes a much stronger pin. When I get home I'm going to buy the strongest pin I can find, or I'm going to make one.

We are camped in the Columbia River Gorge. Cascade mountains are beautiful. Mayibe Mt. Hood tomorrow.

David
__________________
dbj216 is online now   Reply With Quote
Old 08-24-2013, 10:09 PM   #34
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 5,928
Images: 2
Sounds strange, but I would prefer a bent pin over apparent shear as "hardened" can be "brittle... A softer pin can take a few deflections. The harder pin, if brittle, may appear to have sheared.
__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is offline   Reply With Quote
Old 08-27-2013, 10:06 PM   #35
Rivet Master
 
dbj216's Avatar

 
1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,121
I examined the stainless steel shank pin tonight and it is starting to bend. I'll post a picture tomorrow.

The draw bar fits sloppy in the receiver. I can wiggle it in all directions, and the shank pin is what stops the wiggle. I pull with a no sway type hitch with 1400 pound bars. There is a bunch of lift through the receiver. The pin is bent in the upward direction based on how I install the pin in the receiver. The stainless steel pin is the 3rd one displaying deflection in abouit 7000 miles of towing.

Something bad is going on.

David
__________________
dbj216 is online now   Reply With Quote
Old 08-27-2013, 10:46 PM   #36
4 Rivet Member
 
eheffa's Avatar
 
2008 25' Safari FB SE
Victoria , BC
Join Date: Jun 2008
Posts: 333
Quote:
Originally Posted by dbj216 View Post
I examined the stainless steel shank pin tonight and it is starting to bend. I'll post a picture tomorrow.

The draw bar fits sloppy in the receiver. I can wiggle it in all directions, and the shank pin is what stops the wiggle. I pull with a no sway type hitch with 1400 pound bars. There is a bunch of lift through the receiver. The pin is bent in the upward direction based on how I install the pin in the receiver. The stainless steel pin is the 3rd one displaying deflection in abouit 7000 miles of towing.

Something bad is going on.

David
I had a lot of slop & movement in my receiver setup (2010 Ford F150).

I ordered one of these Hitch Rider clamps & things seem much more solid now:

http://www.hitchrider.com/nowobble.htm

I wasn't seeing the draw pin bend but the noise & banging over bumps etc was quite concerning. All that is history now.

- evan
__________________
eheffa is offline   Reply With Quote
Old 08-28-2013, 08:50 PM   #37
Rivet Master
 
dbj216's Avatar

 
1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,121
Well, after about 1000 miles of towing, my stainless steel shank pin has deflected some. I thought it may be stronger, but not enough.

I see some displaced metal on my reducer sleeve. One side had the wear on the upper part of the hole, and the other side has the wear on the bottom side of the hole. This indicates the forces are a torsional load somewhere. I know my hitch is sloppy in the receiver and when I twist, the pin stops the movement.

I'm going shopping for a grade 8 bolt. It will be about 3 times as strong as the low carbon steel pin. It will transfer these forces to some other weak spot in the hitch.

We are in Ft Stevens State Park on the northwest Oregon coast. Beautiful here. I'm the only Airstream out of 200 campsites.

David

Here is a picture of the stainless steel shank pin showing deflection.
Attached Thumbnails
Click image for larger version

Name:	1308 Bent Stainless Steel Pin.jpg
Views:	59
Size:	147.0 KB
ID:	194397  
__________________
dbj216 is online now   Reply With Quote
Old 08-29-2013, 05:56 AM   #38
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up

David,

Why not concentrate on the slop along with the pin?
I think if you "tighten-up", it will help with the pin deflection and the receiver hole elongation.
IMO... The sleeve should not have the oval hole.

The locking pin in post #28 has shown no deflection or ware in seven years of towing both the AS & boat trailer.

Bob
__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 08-29-2013, 08:36 AM   #39
Rivet Master
 
dbj216's Avatar

 
1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,121
Thanks for the reply Robert. I'm in a State Park and away from my garage. And I'm sure my garage is limited compared to yours. I don't weld. I will try to get some shim stock and a grade 8 bolt today. And I will continue to shop for higher quality, tighter fitting reducer sleeve.

David
__________________
dbj216 is online now   Reply With Quote
Old 08-29-2013, 08:52 AM   #40
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up

My garage is a mess....

Bob
Attached Thumbnails
Click image for larger version

Name:	DSC09069.jpg
Views:	59
Size:	281.0 KB
ID:	194444   Click image for larger version

Name:	DSC09070.jpg
Views:	56
Size:	265.0 KB
ID:	194445  

__________________
PFC.....

ďAfter all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.Ē
RLC

Sandra wanted to go to Cleveland on vacation,
but Iím the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 08-29-2013, 09:34 AM   #41
Rivet Master
 
dkottum's Avatar
 
2012 25' Flying Cloud
Battle Lake , Minnesota
Join Date: Jun 2009
Posts: 7,716
This is a shot in the dark, but could there be unusual drag pulling back on the trailer that your new F350 hardly notices, such as trailer brakes partially engaged, or wheel bearings too tight?

Or are you getting a "Hensley Bump", from he brake controller not high enough setting? Thereby banging into the pin at each stop.

Wondering if we're overlooking another factor, while looking only at the pin and receiver.

doug
__________________
dkottum is offline   Reply With Quote
Old 08-29-2013, 09:48 AM   #42
Rivet Master
 
dznf0g's Avatar

 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 9,401
Images: 5
Here is what I would check. But first, is it bending vertically or laterally in relation to your insertion? If vertically, here is my thought. Although I haven't examined a Ford receiver that closely.

I don't think the oval hole in the sleeve is the issue. GM's is oval as well. It should just "float" in there, taking up clearances.

I believe an upward bend indicates, when WD is applied, that the pin is being used as a load bearing "Fulcrum".
It has been my experience that the shank should bear the load of WD at the top of the mouth of the receiver AND at the bottom front (front orientation to front of TV) of the receiver. The pin should float (although there is always some forces applied to it) and not be bearing the WD load.

The causes might be:
1) So much slop between the receiver and sleeve and shank that the the front bottom of the shank can't bottom out on the front inner surface of the receiver until some deformation of the pin occurs.
2) I have seen some receivers that have a very short throat from the pin location to the front end of the receiver tube. Same effect on the pin.
3) the distance from the pin hole to the front of the shank itself is short and has the same effect on the pin load.
4) a combination of all or some of the above.

Hope that makes sense.
__________________

__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:48 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.