---
product_id: 177261742
title: "HappiJac Replacement Single 4220 Acme Screw Jack for Truck Camper System, 360-Degree Manual Override Cranking, Plated and Powder-Coated Tube, Precision CAD Design - 736514"
brand: "happijac"
price: "$1484.19"
currency: USD
in_stock: true
reviews_count: 12
category: "Happijac"
url: https://www.desertcart.us/products/177261742-happijac-replacement-single-4220-acme-screw-jack-for-truck-camper
store_origin: US
region: United States of America
---

# 360° manual override cranking 2,220 lb lift capacity Zinc-plated & powder-coated corrosion resistance HappiJac Replacement Single 4220 Acme Screw Jack for Truck Camper System, 360-Degree Manual Override Cranking, Plated and Powder-Coated Tube, Precision CAD Design - 736514

**Brand:** happijac
**Price:** $1484.19
**Availability:** ✅ In Stock

## Summary

> 🛻 Elevate your adventure with precision and power — don’t get left behind!

## Quick Answers

- **What is this?** HappiJac Replacement Single 4220 Acme Screw Jack for Truck Camper System, 360-Degree Manual Override Cranking, Plated and Powder-Coated Tube, Precision CAD Design - 736514 by happijac
- **How much does it cost?** $1484.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/177261742-happijac-replacement-single-4220-acme-screw-jack-for-truck-camper)

## Best For

- happijac enthusiasts

## Why This Product

- Trusted happijac brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable zinc-plated and powder-coated outer tube resists corrosion, keeping your jack reliable season after season.
- • **Seamless OEM Fit:** Exact-match replacement ensures hassle-free installation and perfect compatibility with your HappiJac system.
- • **Debris-Defying Design:** Integrated wiper at the base prevents dirt and grime from compromising jack performance.
- • **Powerful Lift Capacity:** Supports up to 2,220 lbs, giving your truck camper the strength it needs for stable, secure leveling.
- • **Future-Proof Upgradeable:** Easily switch to an electrical upgrade for smoother, more efficient operation when you’re ready to level up.

## Overview

The HappiJac Replacement Single 4220 Acme Screw Jack is a precision-engineered, corrosion-resistant jack leg designed specifically for HappiJac truck camper systems. Featuring a robust 2,220 lb lift capacity, 360-degree manual override cranking, and a protective wiper to keep debris out, this replacement part guarantees seamless installation and long-lasting performance. Backed by over 50 years of industry expertise, it’s the trusted choice for millennial professionals who demand durability and upgradeability in their RV gear.

## Description

The 4220 and 4280 screw jacks features square tubing. These replacement jack legs are designed for HappiJac truck camper jack systems, and include an outer tube that has been zinc-plated and then powder-coated for superior corrosion resistance. It also has a wiper at the bottom of the jack to help prevent debris from getting into the jack leg, and a zinc plated inner leg. All Happijac jacks have an electrical upgrade option.This kit comes with a single screw jack designed for HappiJac truck camper jack systems. This is a replacement jack leg. Please see manufacturer's guide before purchase to ensure compatibility.For more than 50 years, HappiJac has been producing high quality products for the RV industry. HappiJac conducts extensive research and testing to develop quality products backed by sound engineering. HappiJac leads the industry in fully upgradeable camper jacks, space-efficient room slides and the only camper tie down system that effectively controls camper movement in all directions. From bed lifts and slide-outs to tie downs, jacks and toolboxes, we have the solution for your RV needs.Whether you’re on the road or on the water, Lippert supplies a broad array of premium RV, towing, and marine products designed to enhance all of your recreational pursuits. Our team is committed to always thinking about your next journey — pushing the possibilities of our products and services, all to better your time spent outdoors, whenever, wherever, for years to come.

Review: Perfect fit - The replacement leg is just like the others. Easy to install.
Review: Replacement Jack - Bought this to replace a 2002 Hapijac 4150 that failed. It did the trick, though I did need to file one of the mounting pieces on my camper since the lower bolt hole seems to be ever-so-slightly further from the upper bolts than the original. The manufacturer was helpful in selecting this replacement and sending specs. I wish they had included a top cap and a bolt. Overall, a solid replacement.

## Features

- EXACT-MATCH - The replacement screw jacks are just like your original HappicJac equipment for a seamless installation
- DURABILITY - Outer tube has been zinc-plated and powder-coated for superior corrosion resistance
- STRENGTH - Available with either a 2,220 or 2,800 lb. lift capacity
- PROTECTIVE DESIGN - Wiper at the bottom of the jack helps prevent debris from getting into the jack leg
- EASY UPGRADE - All Happijac jacks have an electrical upgrade option for more efficient operation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07J2SHDW8 |
| Best Sellers Rank | #271,775 in Automotive ( See Top 100 in Automotive ) #591 in RV Jacks & Stabilizers |
| Brand | HAPPIJAC |
| Brand Name | HAPPIJAC |
| Color | White |
| Compatible with Vehicle Type | Truck Camper |
| Customer Reviews | 4.3 out of 5 stars 40 Reviews |
| Global Trade Identification Number | 00848150058843 |
| Included Components | Screw Jack (1) |
| Item Dimensions | 5.75 x 54 x 6.5 inches |
| Item Type Name | HappiJac Replacement Single 4220 Acme Screw Jack for Truck Camper |
| Item Weight | 9.8 Pounds |
| Load Capacity | 2800 pound |
| Manufacturer | HappiJac |
| Manufacturer Part Number | 736514 |
| Manufacturer Warranty Description | 1 Year |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Minimum Height | 7 Inches |
| Model Number | 736514 |
| Style Name | Screw |
| UPC | 848150058843 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Truck Camper |

## Product Details

- **Brand:** HAPPIJAC
- **Color:** White
- **Load Capacity:** 2800 pound
- **Material:** Alloy Steel
- **Vehicle Service Type:** Truck Camper

## Images

![HappiJac Replacement Single 4220 Acme Screw Jack for Truck Camper System, 360-Degree Manual Override Cranking, Plated and Powder-Coated Tube, Precision CAD Design - 736514 - Image 1](https://m.media-amazon.com/images/I/51H0B0NepSL.jpg)

## Questions & Answers

**Q: Does this replace happijac 6100?**
A: I replace a Happijac 4150 with a 4220. A perfect replacement, 15 minute total change out time. This was on a Eagle Cap 850 camper. If you are replacing legs on a camper, there is a list providing the direct replacements. If you are replacing a lift on a 5th wheel, I would be wary of this model number. I could only find that number applied to 5th wheel applications. 
The 4220 applies directly to the mounting bracket on my camper replacing the original 4150.hope this helps. I remember the confusion in using the references prior to my purchase.

**Q: Hello, do these jacks come with the brackets to mount to the camper frame? tia**
A: No they do not come with the brackets.

**Q: i have a 4160.  Would this replacement work with my existing remote?**
A: The 4220 will, its a LOT beefier than the 4160, should bolt in the same...I would recommend talking to Happijak, their customer service is amazing and right there when you call.

**Q: can these be easily removed for driving?**
A: If you mean removed from the camper I would say they are not easy to remove. They are heavy and not easy to line up. More work than I would want to do. I have replaced two of them myself. Was not easy.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect fit
*by T***R on November 17, 2024*

The replacement leg is just like the others. Easy to install.

### ⭐⭐⭐⭐ Replacement Jack
*by B***E on October 8, 2024*

Bought this to replace a 2002 Hapijac 4150 that failed. It did the trick, though I did need to file one of the mounting pieces on my camper since the lower bolt hole seems to be ever-so-slightly further from the upper bolts than the original. The manufacturer was helpful in selecting this replacement and sending specs. I wish they had included a top cap and a bolt. Overall, a solid replacement.

### ⭐⭐⭐⭐⭐ Perfect fit
*by A***R on May 24, 2023*

These jacks were a perfect fit to replace my older 4500 series they seem a little sturdier than the older ones they’re just a little pricey, but I’d rather spend the money and have confidence having a good product ,

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-17*