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| Part Number | Match the number stamped on the original bearing or seal. |
|---|---|
| Dimensions | Measure the mating surfaces when a number is unavailable. |
| Hub / Axle | Use capacity as context, not as the only fitment check. |
Jammy TSAP820 Ramp Door Spring Assist Kit – 120 lb Torsion Spring Part Number / SKU: TSAP820 Heavy-duty spring assist kit for 8-foot-wide trailer ramp doors – includes 120 lb right-hand torsion spring, 12" cable drums, 150" stainless cables, and full mounting hardware. Part Number Spring Rating Cable Length Drum Capacity TSAP820 120 lb (Right-Hand / Clockwise) 150" × 1/8" Stainless Steel 12" Cable Capacity About This Product
The Jammy TSAP820 Ramp Door Spring Assist Kit is designed for 8-foot-wide trailer ramp doors and heavy-duty cargo doors up to approximately 240 lb total weight. The torsion-spring lift system reduces the effort required to raise and lower the ramp while ensuring smooth, safe operation every time.
Product Features
Important Clarifications
Specifications
Note: Verify spring wind direction, cable length, and door weight before installation. Follow proper safety procedures when tensioning torsion springs. Mounting bar sold separately.
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Selected from R&P customer feedback for Bearing / Seal products and related trailer service.
“I've ordered lots of trailer repair parts from them, always fast service, well packed, and the right parts. I highly recommend.”
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