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Hitch Leveling Valve for TSLB


RandyA
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We've talked about this previously but I don't recall seeing any photos or specifics.  I was not happy with just pumping air in the bags and hitting the road.  I found a likely valve on eBay for about $30.  It had an advertised six-second delay but was not specific to any particular vehicle.

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I mounted the valve on the fixed part of the hitch by drilling two holes and then tapping them to accept 1/4" stainless bolts.  The reason for the taping was I did not have room for my fingers to attach a nut to the bolt on the inside.  The mounting position was determined by having the end of the valve handle directly under an existing 1/2" hole in the upper part of the hitch.

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The rubber end links were supplied.  It was important to allow easy rotation of the rubber end links to prevent shifting and binding as the upper part of the hitch moved.  The bottom was easy as the supplied 10mm shoulder bolt allowed movement.  To get free movement with the top rubber link I drilled a hole down the end of the 1/2" threaded rod and then tapped it for a 5/16" threaded stud using washers and a Nylock nut on the end.

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The airbag height adjustment was accomplished by backing off on the gear clamps and moving my link rod in or out.

1/4" nylon airline from the cab leveling valve supply was run to the back for the hitch leveling valve supply line.  There is a ball valve in this line at the tap point so it can be cut off if needed.  The same type of line comes out of the valve and runs to the airbag supply.

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This works extremely well-allowing air to fill or exhaust from the airbags keeping the hitch at a consistent level.  No more concern about a slow leak causing the bags to deflate while on the road.  The built-in delay in the valve keeps from having a basketball action.  It works just like the leveling valve on the truck suspension and the cab suspension.  I did allow for a manual air dump via a ball valve "T'ed" off the bag supply line (valve not shown).

 

Edited by RandyA
spelling error
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I did the same several years ago.  First trip out, I discovered that big bumps can cause more hitch travel than the valve can handle in that location. I ruined two valves before correcting it.

My rather cobby solution was to lengthen the valve arm by double it's stock length.

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Come on Al you are far from a rookie.  Adding a leveling valve to a TrailerSaver saves having to deflate the bags when dropping and inflating when hooked up.  Very convenient.  I don’t remember which hitch you have but Henry’s have this feature as standard equipment.

Nigel

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😉

15 hours ago, Scrap said:

That's a Haldex type CR, or Controlled Response, valve if you need to look up info on it.  Used the hell out of em in the 90's  I think they were branded Neway back then.

Thanks, Scrap.  It is always nice to have an older guy that "remembers when" willing to provide the needed additional information.

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8 hours ago, rickeieio said:

I did the same several years ago.  First trip out, I discovered that big bumps can cause more hitch travel than the valve can handle in that location. I ruined two valves before correcting it.

My rather cobby solution was to lengthen the valve arm by double it's stock length.

The six-second delayed response built into the valve will hopefully keep that from happening.

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5 hours ago, RandyA said:

The six-second delayed response built into the valve will hopefully keep that from happening.

Time wasn't a factor.  A big bump could initiate more travel (degrees of rotation) than the valve could handle, allowing the arm to go over center.  Making the arm longer reduced degrees of travel.  

I am on my iPad, thus can't pull up a picture of my valve, but it's been posted here a couple of times.

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14 hours ago, NeverEasy said:

Nice job.  I like the cutoff valve.  I don't want to loose manual control of the hitch height for hooking up and unhooking.  I just ordered the leveling valve.  Thanks for the inspiration.

Are you going to the ECR? 

 

I would love to hear more about this mod at the ECR. Sounds like a good subject to be discuss. Well at least for me.

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