Rigging Safety Chains
- Configure safety chains to form a cradle that catches the trailer tongue in the event of coupler failure.
- Verify hitch components and safety chain installation comply with SAE J684 standards.
- Apply correct attachment methods using quick links and hitch chain brackets to ensure rigging integrity.
- Wrench or Socket set — Tighten the quick-link hex nuts to secure the chain ends.
- Inspection light — Examine hitch and ball components for damage or non-compliance with SAE J684.
- Safety Chain Kit — Provide the necessary chains and quick links for rigging as per Reese 63035 instructions.
Hitch components should comply with SAE J684. Replace any damaged hitch or ball.
How It Works
Compliance with SAE J684
The cited Reese kit instructions reference SAE J684 for the hitch components used with that installation. Verify the specific component's application, rating and instructions rather than treating this kit reference as a universal requirement for every hitch design. Replace damaged components through the applicable service process.
The Safety Cradle Concept
Crossing the two ends of the safety chain under the coupler is a critical rigging requirement. This configuration forms a cradle designed to catch the trailer tongue if it becomes disconnected from the hitch ball.
Mechanical Attachment Points
Chain ends are joined to the hitch chain bracket using quick links. The hex nuts on these links must be tightened to prevent accidental opening. Quick links must never be clipped directly to the bracket without proper looping and securing.
Step-by-Step Procedure
0/5 doneDiagnostic Chart
| Symptom | Check | Spec / Expected | Likely cause & fix |
|---|---|---|---|
| Trailer tongue could hit the ground during a disconnect. | Verify that the safety chains are crossed under the coupler. | Cross the two ends under the coupler (forms a cradle that catches the tongue). | Chains were run straight to the bracket rather than crossed to form a cradle. Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684) |
| Quick links are vibrating loose or opening. | Inspect the hex nuts on the quick links. | Tighten the quick-link hex nuts. | Hex nuts were left finger-tight or untightened during installation. Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684) |
| Trailer binding or restricted movement during vehicle maneuvers. | Evaluate the amount of slack in the safety chains. | Leave only enough slack to permit turning. | Chains are rigged too tight, preventing the necessary articulation for turns. Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684) |
| Potential failure of the attachment point at the hitch bracket. | Check if quick links are clipped directly to the bracket. | Loop through the hitch chain bracket and join the ends with the quick links — never clip quick links directly to the bracket. | Incorrect attachment method used by clipping the link to the bracket instead of looping the chain. Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684) |
| Hitch component shows visible cracks or deformation. | Inspect hitch and ball for compliance and physical condition. | Replace any damaged hitch or ball. | Use of damaged or non-compliant (non-SAE J684) components. Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684) |
At the Bay: Diagnose the Case
CASE 1 / 5
Trailer tongue could hit the ground during a disconnect.
- Test
- Compare
- Correct
Select the next check
Basis: Reese Safety Chain Kit 63035 Instructions (SAE J684). A likely cause is a hypothesis; confirm it with the applicable service procedure before repair.
Common Bay Mistakes
- ✕ Clipping quick links directly to the hitch bracket instead of looping the chain.
- ✕ Running safety chains straight instead of crossing them under the tongue.
- ✕ Leaving the quick-link hex nuts loose.
- ✕ Allowing excessive slack that lets the chain drag or insufficient slack that prevents turning.
- ✕ Using a hitch or ball that does not comply with SAE J684.
- ✕ Failing to replace a damaged hitch component.
Quick Check
Practice only — not scored.
Plan the Service Sequence
Planning practice only. Follow the applicable manufacturer's instructions, employer safety program and qualified supervision on real equipment.
Plan the first action. Compare the service steps with the bay mistakes.
Source: Reese Safety Chain Kit 63035 Instructions (SAE J684)