Jammy TSAP780 Ramp Door Spring Assist Kit – 80 lb Torsion Spring

About This Product

The Jammy TSAP780 Ramp Door Spring Assist Kit is engineered for enclosed trailers with 7-foot-wide ramp doors. Designed to help offset door weight, it improves safety and ease of use by providing controlled assistance when opening and closing the ramp.

Product Features

• Includes one 5.5 × 50 × 700 mm (?28?) torsion spring rated at 80 lb, with clockwise (right) wind direction
• Two 12? capacity cable drums (left and right)
• Two 150? × 1/8? stainless steel winding cables
• Roof-mount bearing brackets, nylon rollers, and full hardware kit
• Bar for mounting not included — buyer must supply proper spring bar
• Rated to assist doors up to ~160 lb total load (or ~80 lb per hinge) per manufacturer spec

Important Clarifications

• Drum sizing: “12? cable drums” means capacity for 12 feet of cable travel, not physical drum diameter.
• Cable length: Each kit includes full 150? cables. If you receive shorter length, report immediately.
• Compatibility caution: Always match by door weight, not just width.

Specifications

• Spring: 5.5 × 50 × 700 mm (?28?), 80 lb torsion spring
• Wind direction: Clockwise / Right-Hand
• Cables: 150? × 1/8? stainless steel (pair)
• Drum capacity: 12? cable travel
• Mount: Roof mounting bearing bracket set
• Rollers: Nylon (pair included)
• Assist rating: up to 160 lb ramp load / 80 lb per hinged door
• Bar: Not included (must be supplied by buyer)

Note: Confirm wind direction, inspect cable length, and follow all safety instructions during installation. This kit comes without the spring bar — plan accordingly.

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