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  1. Trailer Jack
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  3. Side Frame Mount Jack
  4. 4001 - 5000 lbs
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Pro Series Square Jack with Footplate - Drop Leg - Sidewind - 28-11/16" Lift - 5,000 lbs

Pro Series Square Jack with Footplate - Drop Leg - Sidewind - 28-11/16" Lift - 5,000 lbs

Item # PS1400850383
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Shipping Weight: 21 lbs
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Drop leg jack with integrated footplate welds directly onto your application, has 25-1/8" retracted height and offers superior side-load strength for your agricultural or industrial needs. Includes sidewind crank. Lowest Prices for the best trailer jack from Pro Series. Pro Series Square Jack with Footplate - Drop Leg - Sidewind - 28-11/16" Lift - 5,000 lbs part number PS1400850383 can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (412)
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  • Why etrailer?

Pro Series Trailer Jack - PS1400850383

  • Side Frame Mount Jack
  • 4001 - 5000 lbs
  • Sidewind Jack
  • Drop Leg
  • Weld-On
  • Fixed Mount Jack
  • 29 Inch Lift
  • With Foot
  • Pro Series

Drop leg jack with integrated footplate welds directly onto your application, has 25-1/8" retracted height and offers superior side-load strength for your agricultural or industrial needs. Includes sidewind crank.


  • Superior side-load capacity compared with round jacks
    • Square design provides additional support for side loading
  • Durable, long-lasting steel construction
  • Black powder coat finish resists rust and corrosion
  • Sidewind handle has smooth, ergonomic design for easy cranking
  • Drop leg increases overall extension for maximum adjustability
  • Direct-weld design
  • Integrated footplate base


  • Bracket height:
    • 25-1/8" Retracted
    • 53-11/16" Extended with the leg all of the way down
  • Total lift: 28-11/16"
    • Travel: 15"
    • Drop leg: 13-11/16"
  • Lift capacity: 5,000 lbs
  • Static capacity: 8,000 lbs
  • Handle radius: 7-1/8"
  • Footplate dimensions: 8" long x 6" wide
  • Limited 1-year warranty

1400850383 Pro Series Square Direct Weld Jack with Drop Leg - Sidewind - 15" Travel - 5,000 lbs

California residents: click here

Customer Reviews

Pro Series Square Jack with Footplate - Drop Leg - Sidewind - 28-11/16" Lift - 5,000 lbs - PS1400850383

Average Customer Rating:  4.8 out of 5 stars   (412 Customer Reviews)

Drop leg jack with integrated footplate welds directly onto your application, has 25-1/8" retracted height and offers superior side-load strength for your agricultural or industrial needs. Includes sidewind crank.


If etrailer didn't have such a detailed website, I may have shopped somewhere else. But it was because they have a section where you can ask questions and get detailed answers that I decided to buy the Pro Series jack above. My ATV trailer jack is 2-1/4 " square at the top and welded to the frame. The large nut inside that moves the jack up and down had stripped. Couldn't find another nut anywhere - not locally or on the internet, nor would a machine shop make one for less than $200! Only options were to cut the old jack free and weld on a new one - or - scab parts from a new one and hope they would fit. I took a chance on the latter. Michael Howell really went out of his way to disassemble another of these jacks and measure the o.d. of the main screw inside for me. It was exactly what I needed! The jack came on time and was immediately placed on the operating table. Had a devil of a time punching the pin from the side gear, but after that, and a little grinding on the screw top, I fitted the lower half of the new jack to the gears and handle of the old one. Chock another one up for good old American inginuity and elbow grease! $77 and 2 hours later I had a brand new bouncing baby jack. No cutting, No welding, No Problem!! Pictures of finished jack included. Thanks guys! This saved me well over $100, and now I can go 4-wheeling again!


A good quality jack, we have used lot’s of these on trailers and special use trucks. They hold up well and are easy to use.


Ordered two on Thursday at 7:30 pm and they arrived Monday before noon to central MN. The box was a little beat up but neither were damaged. Very well built product and very smooth cranking. Mounted on the back corners of a 3000 lb. fishhouse that was a travel trailer. We had to replace the bumper as it rusted out and the existing jacks only had a 7" lift with no drop leg. Now we won't have to jack and block, jack and block. The free shipping was the deal maker as they weigh 22 lb.s each. I would recommend this product.


I ordered this Jack the same time I ordered some from [online vendor]. [online vendor] limited my amount I could purchase. The etrailer Jack got here literally 5 days before the [online vendor] jacks


This jack is a MONSTER. Really now, this jack is great. I cleaned the paint off of the area that was to be welded. Welded it to the trailer, cleaned it a bit and repainted jack and tongue of the trailer. Added a bit of grease and not any problems EVER. I have installed over 50 of these and will not use any others if I have a choice.

etrailer has them in stock and the shipping is super fast. Great people to do business with.


Product is very well built and easy to weld to. I used it to create a lift on wheels for my boat's lower unit allowing easy removal.


product has performed well, if I need any additional trailer parts you will be the first I call.


the new jack will replace the original jack which could not hold weight that was on the trailer. with the drop foot provides a quicker lift to disconnect from the tow vehicle, and has a higher retraction height. with the handle on the side provides an easier method to lower and raise the jack. this jack has a grease fitting to maintain the mechanism for the life of the jack. the square tube body provides better attachment to the trailer tong to prevent twisting forward and back in the trailer tong that happened with the original jack with a heavy load.


When I ordered my trailer I had stabilizer jacks welded on the underside of the frame. I could not get to them without laying on the ground so we cut them off. I welded a short section of square tubing to the Pro Series jack and welded a receiver tube under each side of the trailer near the rear. I can now use the jacks one for each side as a stabilizer jack for when I unhook the trailer and still be able to load. When finished I remove the jacks and store them inside the trailer. They are very well made and I am pleased with the jacks


The jack stands were higher quality than I was expecting. I find them equal to or better than the Bull Dog version of the same jack. Great delivery and price. I recommend etrailer and I will use them in the further. BTW, I am using them as side load supports to heavy tractor.


I also ordered 2 of ps1400850383 which I am also very happy with. they to arrived on 2/1/17 also. the day they said they should arrive. very good looking quality jack. well build an heavy duty. will also be using it on farm equipment.

customer service excellent Thanks Leeza.

Excellent quality received them on time
Gary V - 02/01/2018


You guys are one of the best fast shipping great products great info and service also price thanks


etrailer is probably the best one stop trailer solution on the web. I just fabricated my own deck over dovetail tailed from scratch. I ordered just about everything I needed for the build. The sales staff are very knowledgeable and professional. I highly recommend etrialer to anyone weather your rebuilding your trailer or fabricating a new trailer, they pretty much have everything your looking for with very good pricing and they stand behind every product they sell.


Jack seems very solid. Looking forward to getting installed on fish house.


This was the first time ABM Mfg out of Brookings SD has ordered from etrailer.
I had placed an order and our customer changed his mind on the style so I contacted Gena D. and she was so good to work with. We got the first order cancelled and she got the second order ready for shipping. Today we got the three boxes and they were packed very nice and nothing was damaged.
Thanks again for the excellent service you gave us.
Char Thompson
Office Manager
ABM Mfg.-Brookings, SD


Great service,,,barely put my credit card back in my wallet and the FedEx truck was pullin' up,,,well maybe not that quick but it was dern quick service and for a jack I had been paying almost double this price at Tractor Supply......thanx to all at eTrailer,,,more business for you in the future from me. John S.


Already installed on my fish house. They work very well to raise and lower the house.


Extremely helpful and knowledgeable when taking order
Product arrived within 3 days quicker than expected
The Pro series jack with mounting bracket was better than expected
Both were of excellent quality and work perfect for my
Agriculture application. I will again order from Etrailer when I
Need addition items


I appreciate working with and the excellent customer support. Highly recommend!


etrailer actually upgraded my order to a 8000lb jack. I was thrilled when it arrived. I welded it into place and it works perfectly! Thanks, etrailer!!


Received the product very fast and to my door. Ready to weld it on and start using it. Very pleased with the product, quickness, and overall experience.

Product and experience was Great. Company did a follow up a year later, shows great customer service. Thanks
Steve C - 01/24/2015


Welded jack to the trailer. Has excellent lift height for my purpose


Great product delivered quickly and in good shape. Has a few scratches but it’s a trailer jack it will go through worse. Overall extremely satisfied with the product and the company. Will buy more products from them.


I have purchased these same jacks in the past.I find them to be an excellent product.they are very easy to install and holdup over the long haul.I couldn't believe we received it today after just ordering it yesterday.Thanks Rose at e-trailer.


Very happy with the functionality of these jacks!

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