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Hook n ladder 1

5th wheel question/problem

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There's not really a category for fifth wheel questions so I picked suspension.

Anyway I have a Holland FW35.  It's about 12 years old.  I run local semi-dump around Chicago with a quarter frame trailer.  The problem im having all of a sudden is after i dump, there is a gap between the fifth wheel plate and the trailer.  So I'll pull the locking bar and slide the trailer back and get it to sit flat.  I don't have this problem loaded as I think the weight keeps it set.   

I haven't tried adjusting the jaws yet but when hooked up there's about 1/4 inch gap between the bushing on the adjusting rod and the plate.  My holland manual says tighten counter clockwise until the bushing can rotate.  But my bushing rotates already.  Also, the jaws have been adjusted maybe once in 12 years but I never had the trailer not sit flat on the plate.  So my questions are these 1) is adjusting the jaws the answer?  I't doesnt seem like it to me  but if it is do I adjust with the jaws locked or unlocked.

Thanks.

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24 minutes ago, Hook n ladder 1 said:

There's not really a category for fifth wheel questions so I picked suspension.

Anyway I have a Holland FW35.  It's about 12 years old.  I run local semi-dump around Chicago with a quarter frame trailer.  The problem im having all of a sudden is after i dump, there is a gap between the fifth wheel plate and the trailer.  So I'll pull the locking bar and slide the trailer back and get it to sit flat.  I don't have this problem loaded as I think the weight keeps it set.   

I haven't tried adjusting the jaws yet but when hooked up there's about 1/4 inch gap between the bushing on the adjusting rod and the plate.  My holland manual says tighten counter clockwise until the bushing can rotate.  But my bushing rotates already.  Also, the jaws have been adjusted maybe once in 12 years but I never had the trailer not sit flat on the plate.  So my questions are these 1) is adjusting the jaws the answer?  I't doesnt seem like it to me  but if it is do I adjust with the jaws locked or unlocked.

Thanks.

there should be a gap between upper coupler(trailer) and fifth wheel. adjusting the jaws will take up forward and backward slack. it would be wise to inspect king pin and upper coupler for wear and damage along with the fifth wheel and after 12 years it would be wise to remove the fifth wheel flip it over and inspect for wear on the underside also

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7 hours ago, Prowrench said:

there should be a gap between upper coupler(trailer) and fifth wheel. adjusting the jaws will take up forward and backward slack. it would be wise to inspect king pin and upper coupler for wear and damage along with the fifth wheel and after 12 years it would be wise to remove the fifth wheel flip it over and inspect for wear on the underside also

You mean shouldn't?

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in this day and age and for peace of mind and with them being so reasonable I wouldn't even take a chance. throw it away and out a new one on the legs. unless its vintage, fifth wheels are disposable . been a few incidents in recent years up here in Ny with all the scrap and garbage haulers,,, they use a big hoe to push the load down, ended up cracking the fifth wheel down the middle and trailer came unhooked and took out a family van and killed them.not worth it. 

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The gap you are talking about is when the box is all the way up.? If so thats normal.

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HnL,  lf you find it's the 5th wheel just replace it like Maddog said. The company l drive for deals with three different repair shops. lf there is a problem with a 5th wheel none of them will repair it. They just replace it due to liability and cost, so l was told.   .....Hippy

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Ive never had the gap before.  I think whats happening is during a dump cycle the trailer is pulling up on the fifth wheel and pulling the king pin up.  And the more i think about it the gap is more of about an inch and not 1/4 inch. 

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3 hours ago, JoeH said:

You mean shouldn't?

No I mean that it is necessary to have up and down movement between fifth wheel and upper coupler, you will see a gap if  you are not on flat level ground. More than likely with a quarter frame he does not have crank legs but with a trailer that has crank legs you should be able to raise the trailer as much as a half inch above the fifth wheel while coupled.

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An inch of daylight between 5th wheel and trailer ain't normal, and for the price of a new 5th wheel it ain't worth the risk of a bad repair causing a multi-million $$$ accident.

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I'd look at the kingpin too, make sure the disk on the underside of the pin isn't bent/failing.

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i could see daylight between the fifth wheel and the trailer king pin plate with the quarter frame hilbilt all the way up after dumping. i think it takes all the weight off the fifth wheel when its up. an inch? probably not. might be worn out on the plate or the fifth wheel, or both. trailer was a 97 or 98, tractor was an 01.  both were well used 

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At least you figured it out before you had a real problem, like it breaking out of the draft arm while you're dumping leaning that way!

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That's what i was afraid of.  Turns out there was no way to grease the section of pin that froze up.  

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Need Any Repair for your jaws locked or unlocked and want any truck repair shops in your near location then there is many websites and apps which help you to find nearest wheel repair service providers.

road side.jpg

Edited by breakdowninc

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