HappiJac 4820 Acme Screw Jack | 736515 | 2,800 lb | Single Leg

Replace a jack leg on your HappiJac truck camper system with the HappiJac 4820 Acme Heavy Duty Screw Jack #736515. Single-leg exact-match replacement — zinc-plated and powder-coated outer tube for corrosion resistance, 2,800 lb lift capacity, and upgradeable to electric operation.

⚠️ We Carry the 4820 Only

HappiJac makes two model sizes: 4220 and 4820. This listing is the 4820 variant. Verify your existing jack matches this size before ordering — the 4220 and 4820 are NOT interchangeable.

Single Jack Leg — One Per Package

This kit contains one screw jack (one leg). If replacing multiple jacks, order the corresponding quantity.

⚠️ Does NOT Include Turnbuckles or Stabilizing Bar

Kit includes the jack only — required HappiJac turnbuckles and stabilizing bar are sold separately.

Key Specs

• Lift Capacity: 2,800 lbs
• Manual override with 360-degree cranking access
• Upgradeable to electric operation
• Wiper at the bottom keeps debris out of the jack leg
• Precision CAD design for quiet operation

Cross-Reference

Supersedes HappiJac 313774.

Made in the USA

1-Year Warranty

Key Features

• Genuine HappiJac (Lippert) 4820 Acme heavy-duty screw jack
• Single leg replacement (one per package)
• 2,800 lb lift capacity
• Zinc-plated + powder-coated corrosion-resistant outer tube
• Manual crank with full 360° access
• Upgradeable to electric
• Debris wiper at the bottom
• 4820 model only — verify vs 4220 before ordering
• Turnbuckles and stabilizing bar NOT included
• Supersedes 313774
• UPC: 848150058850
• Made in USA
• Backed by 1-year warranty

Specifications

• Brand: HappiJac (Lippert)
• Part Number / SKU: 736515
• Supersedes: 313774
• UPC: 848150058850
• Type: Acme Heavy Duty Screw Jack (single leg)
• Model: 4820
• Lift Capacity: 2,800 lbs
• Construction: Zinc-plated + powder-coated outer tube
• Manual Override: 360-degree cranking access
• Electric Upgrade: Available
• Country of Origin: USA
• Quantity per Package: 1
• NOT Included: HappiJac turnbuckles and stabilizing bar
• Warranty: 1-year