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Author Topic: Fifth wheel front leg pins  (Read 460 times)

TonyL

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Fifth wheel front leg pins
« on: May 20, 2020, 03:07:27 PM »
I don't want to tempt fate here, but considering how much weight they hold, has anyone ever had them fail or needed to replace them?

steveblonde

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Re: Fifth wheel front leg pins
« Reply #1 on: May 20, 2020, 03:34:20 PM »
My hydraulic front legs failed to retrack one time due to a burnt out relay does that count? Lol pain the butt retacting them maually let me tell you- wrong size relay from the factory the tech told me
2015 Voltage 3305 Toy Hauler - loaded
2019 F150 5l Super cab 8 ft box (company truck) daily driver
2017 Black on Black F350 Diesel Dually loaded  5167lbs cargo/weight capacity
Selling truck parts for 15 yrs plus
" If you're not living on the edge you're taking up too much space"
From Canada Eh

edjunior

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  • Roman Forest, TX
Re: Fifth wheel front leg pins
« Reply #2 on: May 20, 2020, 04:47:33 PM »
Nope.  Never had an issue with the pins in the 10 years I've had this 5th wheel.
Ed.....KF5INW
MSgt, USAF, Retired
2019 F-250 XLT, 6.7L PSD
2010 Forest River Wildcat 28RKBS
"I thought I was wrong once, but I was wrong!"

Gary RV_Wizard

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Re: Fifth wheel front leg pins
« Reply #3 on: May 20, 2020, 04:59:15 PM »
I've seen motors fail to raise/lower them and screw threads strip, but haven't seen or heard of any catastrophic failures. Haven't seen any hydraulic jacks just collapse either, though it has probably happened somewhere.  IMO it's one of those problems that is conceivable but such low probability that it isn't worth losing sleep over.
Gary
--------------
Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

8Muddypaws

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Re: Fifth wheel front leg pins
« Reply #4 on: May 21, 2020, 10:18:06 AM »
I had one of the pins shear.  It was easy to replace.

If you're really worried about it carry some spares.
Retired computer professional
Musician, songwriter,  mediocre guitar player.
2006 Bounder 34H, 2008 CR-V Toad

donn

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Re: Fifth wheel front leg pins
« Reply #5 on: May 21, 2020, 01:14:49 PM »
When I still had a single motor, one shear pin.  The single motor was simply not up to the task of raising the front of my fiver.  I converted to a dual motor setup and never looked back.

Rene T

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Re: Fifth wheel front leg pins
« Reply #6 on: May 21, 2020, 03:33:24 PM »
What shear pins are we talking about? Is it the one right off the motor? When the op started talking, I thought he was talking about the pins in the legs that you remove when you initially manually extend the legs then the pin gets put back in. Maybe I misunderstood the question.
Rene, Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

TonyL

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Re: Fifth wheel front leg pins
« Reply #7 on: May 21, 2020, 03:40:05 PM »
Yes Rene, I am talking about the pins actually on the legs that are used to extend them.

Rene T

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Re: Fifth wheel front leg pins
« Reply #8 on: May 21, 2020, 03:48:17 PM »
Yes Rene, I am talking about the pins actually on the legs that are used to extend them.
That’s what I thought. Thanks for clarifying that. We were going off another tangent and I was getting confused which doesn’t take much.  I have never heard of those pins shearing. Some engineer here should be able to figure out what forces it would take to shear a pin in two places at the same time.
Rene, Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

donn

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Re: Fifth wheel front leg pins
« Reply #9 on: May 21, 2020, 03:56:11 PM »
Actually a typical single motor landing gear setup has one shear pin.  It is the pin that connects the two halves of the cross over shaft.  Where the short srub shafts connect t the  gear box are not really shear pins, but drive pins

TonyL

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Re: Fifth wheel front leg pins
« Reply #10 on: May 21, 2020, 04:00:03 PM »
That's the trouble with staying in one place too long, you get to thinking stupid things. It was just that each pin is around 3/8" thick and the leg is actually supported in two places on the pin by about 1/8" thick steel (the boxing that holds the telescopic section. Refer bar cutters use a shearing action to cut the bar, so I was just pondering...……... ::)

Rene T

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Re: Fifth wheel front leg pins
« Reply #11 on: May 21, 2020, 04:34:10 PM »
so I was just pondering...……... ::)
So stop pondering. ;D :D ;)
Rene, Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

jackiemac

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Re: Fifth wheel front leg pins
« Reply #12 on: May 21, 2020, 06:26:31 PM »
Methinks you're bored Mr L!
Jackie n Steve - Happy Scottish Travellers

2017 Heartland Sundance 288rls
2016 Dodge Ram 2500 6.4L Hemi

Back in the UK til who knows....

TonyL

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Re: Fifth wheel front leg pins
« Reply #13 on: May 21, 2020, 06:41:55 PM »
No Jackie, just need more Rye and dry!!!!!!!!!

8Muddypaws

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Re: Fifth wheel front leg pins
« Reply #14 on: May 23, 2020, 09:53:25 PM »
If the pin gets cut into pieces it has become a shear pin regardless of what the engineer thought.   ;)
Retired computer professional
Musician, songwriter,  mediocre guitar player.
2006 Bounder 34H, 2008 CR-V Toad

redcaddy51

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Re: Fifth wheel front leg pins
« Reply #15 on: May 26, 2020, 05:12:50 PM »
When I brought this NTM trailer home the first time, I noticed that both spring pins were rusted solid. I left the trailer on the truck and went to my local Camping world in search of new ones. They wanted $78.95 for a pair. Later that night I ordered a pair of 3/8ths pin, clamp on units, (exactly like what I had on the trailer, without the rust) chrome plated fer $23.50, free shipping. Changed 'em out, Easy, no worries.

If it makes you feel any better, a 3/8ths mild steel pin, in shear, will support roughly 3 times the load you could generate, dropping the pinbox off the receiver. some, 5ers, 3 axles and upwards of 6 K pin weight use 7/16 pins, and that's overkill.

As has been said before, Chill, it's no big deal.
If it turns $$$$ into smoke and noise, I'm there. Keystone Cougar 27 EFS

Rene T

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Rene, Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

redcaddy51

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Re: Fifth wheel front leg pins
« Reply #17 on: May 27, 2020, 07:59:04 PM »
Say after me. I will not feed the troll, I will not feed the troll, I will not feed the troll...

Sorry, Paul in floriduh
If it turns $$$$ into smoke and noise, I'm there. Keystone Cougar 27 EFS