Replaces the bottom housing kit for Husky Brute Series HB4500 and HB4500R electric trailer jacks (HT87641 and HT87247). Kit includes covers to protect both the gearbox and the motor assembly from Features: Replaces the bottom housing kit for Husky Brute Series HB4500 and HB4500R electric trailer jacks Fits HT87641 and HT87247 Included covers protect both the motor assembly and the gearbox

The Ultra-Fab Protective Cover for Electric A-Frame Jacks - Vinyl - 12" x 14-1/2" # UF38-944020 is the protective cover I recommend for your Husky Brute 4,500 lb Trailer Jack # HT87247. I've attached a photo of the dimensions when laid flat, but I've also attached a video to assist with the fit. It has a durable vinyl construction with integrated draw string closure.
There are literally dozens of manual trailer jacks available. This is a very simple device that doesn't cost a lot of money. There aren't huge differences between the different available options, so we picked a light duty and a heavy duty manual jack option to give you an idea of what is out there. The manual trailer jacks we chose get good reviews on Amazon and are great choices if you wish to go the manual route.
According to the information I was able to find, the Ultra-Fab Electric A-Frame Jack you referenced, part # UF38-944016 would be a good choice for the Keystone Outback Toy Hauler you mentioned. The jack has a 3500 lb lift capacity, which is plenty for the listed tongue weight of the toy hauler, plus anything stowed on it. Among the many features of this jack, I like the fact that is uses LED lamps for long life as well as the fact that a 9/16 inch socket wrench can be used in an emergency...
Jack Cover, (John Higson Cover, Jr.), American physicist and inventor (born April 6, 1920, New York, N.Y.—died Feb. 7, 2009, Mission Viejo, Calif.), spent most of his career in aerospace but became famous in the mid-1970s for inventing the TASER, a handheld weapon that fires darts attached to insulated wires to deliver debilitating electric shocks at ranges of up to several metres. Cover’s goal was to devise a nonlethal means of stopping violent acts, such as riots and hijackings. Though the TASER was initially classified as a firearm because the darts were propelled by gunpowder, in 1993 Cover used compressed nitrogen to activate the darts; the modification allowed the public to purchase his invention. The TASER name (a registered trademark) was a modified acronym from the title of one of Cover’s favourite childhood books: Tom Swift and His Electric Rifle.
Bought one to protect the head unit on boat trailer electric jack. Works great. Bought two more to protect our eBike (pedelec) computers on the handlebars of our bicycles. Fits nicely over the brake handles and the computers to protect them from inclement weather. Our bikes sit on an external bike rack when we travel. I had to take apart the computers and use a hairdryer on them after out last two thousand mile trip. Hope these eliminate having to do that and prevent future damage to the computers. 319085
The Ultra-Fab Electric A-Frame Jack # UF38-944017 is a great choice for your 2009 Sunnybrook Edgewater Travel Trailer. It has the industry standard mounting of 3 inches on center to mount to your coupler and has an 18 inch lift. The round footplate is a 6 inch diameter for great support and stability. It has a 9/16 inch bolt that will allow you to use a deep well socket to extend of retract if the battery fails. You may also be interested in the Ultra-Fab Protective Cover # UF38-944020...
It sounds like there may be a short in your Bulldog jack which could have been caused by excessive moisture from the rain. Also I recommend checking the wiring from the jack to the ground and power sources. The jack grounds through the mounting hardware so you may need to temporarily remove the jack (be sure to support the trailer another way) and sand away any corrosion. Also check for corrosion or damage to the power wire and where it connects to the battery. The light switch...
This electric A-frame jack offers 22" of total travel and features an LED courtesy light for simple nighttime operation. Crank included for manual override in case of power failure. Features: Tongue jack positions quickly and easily with integrated drop leg Powered drive provides quiet operation and efficient use of electrical power No more hand cranking Easy-to-access on/off
As soon as you place your order, you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

I went out to the warehouse to look at the Lippert Electric A-Frame Tongue Jack, # LC285318. In order to remove the screws that secure the cover you will need a long and thin phillips head screwdriver. If you don't already have one, you'll want to purchase a Protective Cover, # UF38-944020, to keep your jack dry when you are at the campsite. This will protect the head of the jack and keep the motor protected from the elements.

The Camco Electric Tongue Jack Cover helps protect your electric tongue jack when it is not in use and in storage. The durable, 3-layer spunbond polypropylene provides protection from harmful UV rays, excess moisture and dirt and debris. The Tongue Jack Cover accommodates most styles and brands of Electric Tongue Jacks, and measures 18 tall x 7- wide x 8- deep.
Designed for use with your heavy-duty Bulldog single-speed jack, this powered drive offers quieter operations and a more efficient use of electrical power than competitive units. Lifting has never Features: Makes lifting with your Bulldog jack faster and easier Fits Bulldog single-speed jacks with 12,000-lb static capacity Works great for horse, livestock and heavy-duty trailers Designed
This custom-fit mount lets you secure your Hi-Lift jack to the driver's side of your Jeep. The jack mount lock codes to your ignition key. Automotive-grade, weather-resistant black powder coated of keys - for your hitch lock and coupler lock, your pickup cover or trailer door, and all the various padlocks securing your equipment? Tired of fumbling for the right key or having to replace a lost key?
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